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Sirius was ecstatic to be out of that fucking house. Grimmauld encapsulated all the nightmares of his childhood and adulthood: guilt and antipathy and nauseating restlessness. Being stuck there left him nearly vibrating out of his skin with the need to move.

That Harry had reached out to him, all angst and worry and twisted neurosis desperately seeking comfort, and provided him a reason—any reason—to leave that behind…well. Of course he was worried about his godson.

But mostly he was glad to be out of that house.

Sneaking back into Hogwarts was coming home. Dangerous as all hell certainly, with the monitoring wards buzzing at the gates and detection charms hung like spiderwebs along the corridors, but less dangerous than scampering around the grounds while pursued by dementors. Besides, danger had never put Sirius off a bad plan before. Why start now? He was a Marauder for a reason and slinking through the castle as Padfoot put him in mind of better times.

He first went to the tower, but Harry's scent trail was from the morning; he had never returned to the Gryffindor commons after his classes. Luckily, Sirius was familiar enough to find Harry’s trail even when it waned with distance and time. During the summer, he hadn't really thought about why he stole an old shirt out of Harry's truck and charmed it to never lose its scent, but the familiarity was helpful enough now.

Harry's scent crisscrossed the entire castle. It took almost an hour of nerve-wracking and thrilling exploration before Sirius picked up on what had to be the most recent trail: just a couple of hours old, leading down into the dungeons.

He was harder to track in the depths of the castle, overpowering as it was with the smell of cold damp stone. But Sirius knew there were limited options of likely locales, and considering their last conversation, he had a pretty good idea of where he would find Harry.

When he had searched for Wormtail two years prior, there had been little reason to visit the dungeons. But once he had seen Snape, Sirius just wasn't able to resist. He had followed the man to the potions classroom and watched him disable the wards leading to his personal room. After Snape had left for dinner (or maybe lunch? Time was not the easiest thing to grasp, then) Sirius had gone right up to the doorway and pissed on the door before fleeing, half-terrified and riding the high of getting one over on the slimy creep.

At the time it had been just a funny little prank. But now, Sirius was thankful he knew the way and could at least get started on the ward scheme to Snape's rooms. Surely, if Harry was in the dungeons, he would be there: perhaps confronting Snape like Sirius would? Or maybe he was planning his own retaliatory prank like James might've? Or, if he continued to be just a little bit too tediously like Lily, he would be trying talk to Snape and understand his point of view. Regardless, observing the boy's purpose would help Sirius understand what Harry needed from him.

The potions door was closed. Underneath, Sirius caught an unmistakable whiff of Harry. Fresh. He sat back on his hind legs and stood, twisting the knob between his paws until the door swung open with a very quiet squeak.

Immediately, Sirius knew that something was wrong. The classroom stank of human sweat and bodies, alien to his canine nose. The torches on the wall still flooded the room with light despite the late hour.

But more importantly, there was the unmistakable sound of sex coming from Snape's quarters. Little "uh uh uh uh uh"s, the slap of skin against skin, low grunting, and the creak of furniture shaking with movement.

Oh no, thought Sirius. Oh, fuck this. The last thing that he wanted was to see what—or who—Snape got up into during his free time.

But it was Harry's scent permeating the classroom and it was Harry's voice—his lovely voice as Sirius had never heard it, tortured and rhythmic—and Sirius could not have walked out of the potions classroom for anything. Instead, he walked over to the familiar door to Snape's quarters, already knowing what he would find.

But fuck if the sight of it wasn't a revelation.

Harry: naked and skinny enough that his bones protruded against his golden-tan skin, bent over a desk. His chest was pressed against the wood, legs spread wide on the other side. Dark curls of hair bounced with every movement; a blindfold covered his eyes but not his twisted brow; his lovely pink mouth was open and gasping.

And behind him, driving all the movement, was Snape. Snape curled above Harry, holding the boy's arms at the small of his back for leverage even as he furiously thrust into him. Harry looked small at the best of times but underneath Snape, who was still wearing his dark professor's robes, he looked absolutely tiny. Something to be owned and used. Nothing more than a toy.

Sirius's hatred of Snape warred with the undeniable wave of lust he felt at the sight. But disgust only heightened his hunger: to see Harry—lovely, lonely, small, scared and sacred and angry Harry—writhing like a wanton slut underneath the vile mass of Sirius's enemy…oh, oh God, it was the most erotic thing Sirius had ever seen in his life.

"That's it," hissed Snape over the litany of Harry's punched out breaths, "That's it. Yes—that's what you're meant for."

A longer breath, too tired to be a moan but almost there.

Sirius couldn't help himself. He padded in through the doorway, aching to see Harry's pretty little ass split open on Snape's cock.

But as soon as he stepped through, Snape's head snapped up. A bright flash of golden light emanated from the doorway and Snape's hips jerked to a stop as he looked towards the entrance, then down, and made eye contact with Sirius.

Right. The wards.

There was a moment of near stillness where the only noise was Harry's panting. Snape stared at Sirius in frozen shock and Sirius looked back, mind utterly blank. Never had he felt as much like a prey animal as he did there, pinned under the gaze of his enemy.

The moment broke with an uncertain whine from Harry, confused by the pause. He wiggled his hips slightly and let out a gorgeously out-of-breath, “Wha..?”

Snape's stunned expression melted into a rictus of malevolent glee that sent Sirius almost flinching back. Without breaking eye contact, he snapped forward with enough force that Harry gave a rough shout. "Quiet, you little whore. You don't get to make demands—you can only take what you're given." Another harsh thrush, another cut-off scream.

Sirius tried staying still but couldn't help the way that he went taunt with want. Snape's smile twisted even farther. He grabbed at Harry's wrists and mumbled out a spell; when he withdrew his hands, rough rope encircled them behind the boy's back. Keeping one hand on the knots, Snape reached up and cruelly yanked Harry's head backward, making the boy give an exhausted yelp.

Sirius had never felt envious of the greasy bastard before, but to have his hands buried in those damp curls…

Still with an eye on Sirius, Snape said, "You're not enough. You're a poor student, a stupid child, a failure in intelligence and charm and anything—anything—that could help against a threat like the Dark Lord. It is your fault that he returned and you don't even have the grace or acumen to be able to handle it."

Harry's gasping breaths had the edge of tears on them. He started to say, "Wa-Wait, that's not—" but Snape continued, "You failed, Potter. You failed poor Mr. Diggory and all your peers and your dead parents who would be ashamed to have died for such a waste. That's the real reason why your friends abandon you; why your dogfather ignores you; why no one will tell you anything. Because you, slut, are such a pathetic little failure." He yanked the ropes even tighter.

It could not be mistaken now; Harry was crying. Shaking his head in a futile gesture of rejection, little tremors running down his body. With his head pulled back, Sirius could see that narrow chest heaving, the little tits already encircled with bite marks.

That was too much. With the soundless flourish of long practice, Sirius turned back into a human and unzipped his trousers to pull out his already-straining cock. He spat into his hand and then ran the wetness along his length. He winced at the noise but Harry didn't seem to notice.

Snape laughed a little and leaned over Harry, while turning that wicked grin towards Sirius. "You're so pathetic, and such a failure that the only use you could ever have is at the end of a cock. That's your only utility. This hole," another violent, bone-shaking thrust, "is the only worthwhile thing about you. At everything else you’re a disappointment, but at this—being fucked, being a cocksleeve for me—you're almost adequate. This is your true purpose. You're a born whore, and it's just like you to be such a miserable fool that you need someone to come and tell you because you couldn't figure it out yourself."

Harry let out a sob and Sirius had to shove his fist into his mouth to keep from audibly moaning.

"This should be what you talked about in your career section; you couldn't last a month as anything other than a whore, taking it up the ass and in your mouth from men who are better than you in every way. Just a disposable little fuckdoll. A toy—that's all you are, a fucking fleshlight for me to find my own pleasure in."

Snape leaned in closer, yanked Harry's head again and bit, hard, into the juncture of neck and shoulder. It wasn't a hickey or a love nip; it was the vicious punctuation to Snape's words.

"And when I'm finished here, I won't have any more use of you. What should I do then? Throw you away, to be certain, but there's so many lovely possibilities. Perhaps I should take a picture of your gaping ass, your vacant drooling face, and send them to Ms. Skeeter so the whole wizarding world knows what you are? Just a little attention whore acting out because he needs a cock in him to keep complacent. You wouldn't be able to so much as go into Diagon Alley without being forced to your knees."

Oh God, Sirius thought. Oh God, that's it. He gripped the base of his dick so he wouldn't come yet, but the little fantasy Snape was weaving…oh God.

"Can you imagine? Sitting in the Great Hall when the morning papers come in and on the front page of every single one of them is a photo of you writhing for more, cum dripping out of that slutty little mouth and pouring from your wrecked hole. Dumbledore would be so disappointed in you—more than he already is. But you would barely have time to notice before the entire school started laughing at you, jeering at you. And as soon as you step outside, a group of students would strip you naked so everyone could compare your whore holes—your most identifiable features, now—to the newspaper."

Harry had never really stopped crying but at this, he let out a wrecked moan, and with more energy than Sirius thought he had left, started awkwardly rocking against the desk below him.

Snape looked incensed at this response. He slammed Harry's head down hard enough that Sirius winced and almost—maybe—stepped in. He let go of the mussed hair, only to grip Harry's tied wrists with one hand and hit Harry's ass with the other, loud enough that the sound echoed through the room.

"That's what gets you off? The thought of being stripped naked and humiliated in front of the entire school with no one to help you?"—Oh right, Sirius thought— "Fuck you, slut. You'd deserve that. But I doubt even that is enough for you. No, it couldn't be enough for such a pathetic cumrag."

"Maybe instead, I just leave your naked body laid out in the dungeons? Write a sign saying 'Free Use,' hang it above your head and leave you there for any of the Slytherins to find and fuck. Maybe I'd be kind and let you get off on their use but perhaps, after I'm done with you, I put a curse on that little cocklet of yours so it can't cum anymore. Maybe I petrify you, so all you can do is take and take and take without any input. None of this fucking crying"—another mean slap—"none of your spoiled whining—just you, a brainless toy, unable to move, unable to do anything but get fucked."

Harry's voice was getting back to where it was when Sirius first heard it—the endless litany of "uh uh uh"s, but so much more breathless and strained. For his part, Sirius could barely breathe through his overpowering lust. Despite wanting it to last, he couldn't help but speed up stroking his leaking cock.

"That's all you are! That's all you'll ever be! A cumslut, a fuckdoll, a mindless fleshlight worth nothing beyond your holes. And after I'm done, everyone will know. Seventh years will visit you as stress relief, sixth years to get over their blue balls. Fourth years will dare each other to get their dicks wet for the first time in the slut-who-lived, while younger ones will send photos home to their parents, and the staff will realize how useless it is to grade you on anything other than your tightness."

"But it's your classmates that will really do you in. They'll never let you be. There's nowhere you can be safe from them—not your classes or your dormroom or the halls. They'll always surround you. They'll fuck you until your ass is so loose it couldn't hold a vase, until your miniscule use as a cumbucket has worn out—and then, they'll Crucio you just to get you tight enough to finish, while what's left of your brain melts out of your ears. At that point, we might as well leave you out in Diagon Alley, next to the trash and waste"—a sudden, sharp grin—"for any dogs that wander by. Yes, that's it: next to the entrance: stick your bottom half through the brick wall so everyone can see the Boy Wonder's wrecked ass, and they can point and laugh at what an utter freak show it is."

Harry came with a shout, legs curling up and head thrown back as if to show off the smooth line of his throat. A splash of white cum leaked across the desk, dripping down the sides.

"Did I say you could cum?" roared Snape, but it was no use: Harry had already gone completely limp. Though Sirius couldn't see those eyes underneath the blindfold, he was certain they were shut. He was just a ragdoll shaking with Snape's increasingly furious movements.

"Oh God," Sirius whispered, revenant. His hand was hurting with how fast he was stroking himself and he was riding so high—he was on the edge—he was so close—

Snape still had one hand on Harry's tied up arms but with the other, he grabbed his wand. With a jabbing motion above the boy's spine, he yelled, "Acerbum," and then Harry was jerking, screaming, thrashing in a sudden spike of pain—

And Snape was groaning as he shoved deep into that tightened ass, and just like that, Sirius was gone, cum splattering across his hand and dripping down to the stone floor. His head was ringing with the sudden let-down. He continued rubbing his cock through the after-shocks but that quickly became uncomfortable.

After a few moments were the only sound was panting, Snape withdrew. Cum started dribbling out of Harry's now relaxed and winking hole. Even though he just came, Sirius felt his prick twitch a little as he thought about Snape’s words, about seeing that hole wrecked and gaping.

But those thoughts stalled as Snape cleared his throat. Sirius met eyes with the bastard, whose head was tilted slightly to the side and whose expression was inscrutable. After a long moment, Snape snorted a little, then said, “Well, have at it.”

“What?”

Another mean grin. Now that he was no longer leaning over Harry, Sirius found himself able to snidely notice the yellowed teeth. “What else are you waiting for? A welcome sign?” Snape gave a mocking bow of his head and flourished his wand at Harry. Black words swirled into existence right above the boy’s ass, and when Sirius tilted his head to read them, he saw “Free Use” emblazoned on sweaty skin. That sent another swoop through Sirius’ stomach.

But he wasn’t going to abandon 25 years of suspicion on a whim. Glaring at Snape, he said, “What’s in it for you? Why do you want me here? Why the fuck were you performing for me?” Then, getting on a roll, “How long had this been going on, you bastard? In fact, what the fuck is this? Harry despises you! You must have done something to him—if you hurt my godson—”

Snape laughed, “You seemed to like it when I hurt him earlier, Black.”

That—that—well, “But that wasn’t—that’s—that’s different, I was just…No, you don’t twist this! What the fuck was Harry doing here?”

“Does it matter?”

“Does it—of course it matters!”

Snape took a step towards Harry and put one hand on the boy’s ass, patting it a little, then dragging his hand higher to trace the tramp stamp that he had put there. Despite himself, Sirius couldn’t help tracking the movement. Snape said, “I don’t think it does matter. And would you like to know why, Black?”

Sirius meant to sound—strong, or mocking, or anything but desperately curious way that he sounded when he asked, “Why?”

“Because Potter is here now, already wide and wet and waiting. Why is he here? Because this is where he is meant to be: in this position, ready for you to take your pleasure. He doesn’t have to know. He only exists right now to take cock.”

Snape’s melodious voice, the sight of that hand rubbing the reddened skin of that fabulous ass, the steady rise of his own prick…Sirius could feel any resistance slipping away. But he had to say: “But you hate me. Whatever problems you and Harry have with each other—that’s nothing in comparison to how much you despise me. So why are you offering me this?”

Sirius could have lived without seeing Snape grin like that. “You’re right, Black. I abhor both of you fucking ingrates. But that’s why I want you to fuck him. I want to see you, you self-righteous hypocrite, take your godson, the precious pure idiotic Golden Boy, without his knowledge or consent. I want to see you break him open like he deserves and I want to see you acknowledge how depraved you really are. In other life, you would have raised the boy, but now, right now, you want nothing more than to have him on your cock.”

Sirius gasped an involuntary, “Fuck,” as Snape spoke. And he wanted to fight back against Snape’s words, but—but Harry was right there and he wouldn’t ever have to know—and hell, at this point, what was the harm? He had already gotten off on Harry’s violation. It wasn’t like indulging just a little bit more would really be all that worse.

Like there were strings controlling his movement, Sirius stepped forwards. Once, twice. Snape kept Harry in between them as he stepped to the side but did not move away entirely. Sirius tried to ignore the intense stare aimed at him as he himself focused on the boy laid out in front of him.

With a hesitant hand, Sirius caressed the sweaty skin of Harry’s thighs. They were lightly furred and muscled from Quidditch but still too thin for a growing boy. Taking inspiration from that thought, Sirius reached down and pulled Harry further off the edge so he could take a look at the cock hanging between those soft legs. Decent size for a teenager, and—fondling the prick in his hand then weighing the balls—decent heft as well.

Still. With Harry flaccid and Sirius starting to get randy again, his dick stood nearly twice as big. The sight of his own reddening cock so close to Harry’s golden thighs and limp dick was unspeakably erotic. Sirius choked on his inhale, overcome.

Next, he trailed his hand over the words written above the boy’s ass, and by God was that the second hottest thing he had ever seen. Free Use. It looked just like a tattoo, plastered as it was underneath the sweat and the first layer of skin. Situated under Harry’s still-tied hands, it only looked more obscene. And the words themselves…Sirius bit his lips thinking about Harry—Harry being used by his dorm mates, Harry held down in the Gryffindor common rooms, Harry being fucked in the Great Hall, Harry being strung up naked next to the lake for the entire school to see…

Sirius thought about how Harry had cried earlier, how he had sobbed and moaned and eventually gotten into it anyway; he imagined that reaction stretched out over hours of being used, hours of dozens of different people all fucking him until he could do nothing more than drool.

Harry, reduced to nothing more than a toy for the public which loved and reviled him at once.

Sirius was fully hard, now, caught up in the nexus of Harry-Harry-Harry, but it wasn’t enough. Even fucking him wouldn’t be enough, not without some aspect of those fantasies…

With barely a thought, Sirius swooped down and picked Harry up. The boy was far too light. Even with the weakness of Azkaban clinging to his muscles, Sirius had no trouble hefting Harry into his arms, then turning around to the door, and carrying him into the classroom.

Snape was quick to follow. “Black, what in Merlin’s name are you doing! Do you want to be caught?”

He didn’t want to pull himself from the fantasy, so he just said, “I’m only going into the classroom, Snape, don’t get your panties in a twist.” Then, speaking over the furious inhale, “Just want to fuck Harry in a place where he normally spends time. Think about it: every time you have to teach him in the future, you can imagine him getting stuffed full in front of the class.”

Sirius was pleased to note that Snape groaned a little at that. Payback and all.

“Fine. But I will be putting up some wards because I will certainly not be found in this position.”

“Yes, yes, alright.” He didn’t care to watch as Snape pulled out his wand and started casting at the door, too concerned with where to put the boy. There was the desk in the front of the classroom, of course, which had quite a bit of appeal. But it was off to the side and angled in an unfortunate way. Besides, it seemed too staged. The student workbenches however… “Hey Snape, where does Harry normally sit?”

A pause, and then a mean little laugh, “Second table from the back, left side.”

Sirius rushed over to that station. A bit taller than the table had been, covered by a black tabletop whose surface was decorated with a multitude of faint stains and graffiti from the generations of students who had worked there. Laying Harry down on top and seeing him surrounded by the proof of other people’s presence was a massive turn-on.

But he quickly missed the sight of those words on the boy’s back. Sirius turned him over, and yes, that was perfect. He looked breakable. With the tattoo and the tied hands and the legs not even long enough to touch the ground.

Sirius caressed the words and then Harry’s ass. There was the faint heat of bruises rising to the surface from where Snape had hit him. Pulling those cheeks apart, he finally got the ideal view of that hole. The rim was reddened and slightly puffy from friction, still twitching after the intense fucking. A bit of crusted cum glistened at the edges and along his crack—and while Sirius hated the man that put it there, seeing evidence of Harry having been used…Sirius traced that rim, watched it twitch more, and then opened up the hole with two of his fingers.

He immediately felt Snape’s cum coating the inside. Groaning in desire, Sirius forced in another finger. This one fit in the loosened hole, but actually moving was uncomfortably grating, even with the drying cum and lube. He quickly pulled out his wand and stuck the tip in to cast a lubrication charm. While he wasn’t overly concerned with Harry’s well-being, he’d always preferred a messy fuck. Plus, going in that dry would have hurt him. He certainly wasn’t a masochist.

Sirius noticed when Snape approached and instinctually flinched back. But Snape merely stood on the other end of the table. He yanked Harry’s head back and re-adjusted the blindfold so it fit snugly.

And that…using Harry while he was so helpless…yeah, Sirius was ready to go.

Sirius held onto the boy’s waist with one hand and guided his cock towards Harry’s hole. He rubbed the head along the crack and let it get caught on the rim. Then slowly, inexorably, he pushed forward.

God…feeling his dick enveloped by that pulsating heat was transcendent. Harry wasn’t the tightest that Sirius had ever had, but the knowledge of why he was loose and what was slicking his ass other than lube made Sirius love it even more.

His concentration was caught when Harry groaned at the stretch. The boy’s legs involuntarily kicked forward, but they only rammed into the table. That jolt of pain was enough for his ass to clench, so tight that Sirius had to hiss. Nevertheless, he managed to push through it in his quest to bottom out.

And that was enough. Harry jerked forward, whimpered, clenched and loosened, then in a scratchy voice, “What…?”

Sirius kept working his way in.

“That—Snape?” And then all at once the boy seemed to catch up. He tried to recoil away from Sirius but couldn’t manage with his hands tied back and his legs hanging uselessly. He yelled as best he could through his weakened voice, “You—you—how could you? That wasn’t—let the fuck go of me!”

Sirius paused a second. He had never fucked someone who was completely unwilling before—if they were reluctant, then he could generally loosen them up with a drink and talk them around. It was—he wasn’t a—

Sirius was already opening his mouth to say something to the boy. But Snape quickly shook his head and said, “Now, now, Potter. I think we already had the talk about how to speak to your superiors.”

Sirius’s hips jerked.

Harry yelped, which made Snape laugh. “And it certainly doesn’t include lying. You want this, boy.”

“No, no I don’t! I just wanted to apologize, not—”

“You knew what you were asking for—”

“It wasn’t this!” Harry yelled as he started really struggling. His top half writhed on the table, his hands strained against the rope, and his legs kicked backwards. Though he couldn’t gain much momentum from his position, the blow managed to dislodge Sirius from his place inside the boy’s hole.

Snape spoke over Sirius’s instinctual growl at the loss of heat, and continued speaking as Sirius forced those legs apart then shoved himself back in with one hard thrust. When Harry howled at the sudden fullness, and then started panting with Sirius’s thrusts, well, Snape spoke over that too. “But you were made for this, you little whore. It doesn’t matter what you thought because you can barely think! Perhaps you didn’t know that you were being a tease, but only because what you do know could fit in those pathetic little balls of yours.”

Struck by that lovely inspiration and still smarting from Harry’s kick, Sirius harshly grabbed the boy’s balls. He squeezed and delighted as the hole around him tightened in response.

Snape impatiently waved his hand. What else does the git want? Sirius thought irritably, before the lightbulb went off. He grinned as he lightly slapped the balls. Then, gaining confidence, he hit them against the side of the workbench.

Harry moaned. Both Sirius and Snape froze for a second. They made shocked eye contact that was quickly broken when Snape grinned and Sirius turned down to focus on the boy. Harry was saying, “Th-That’s not true, I’m—”

But Snape interrupted, “You like this. You know—with whatever miniscule brain you happen to possess—that you like this. You crave it. You like it when I slap your tiny balls,” and Sirius obligingly did so, “when I hit your ass,” Sirius loved adding to that reddened skin, “when I speak down to you. And you love it because you’re a born whore who has fucked up at every single fucking opportunity awarded to you—not only are you made for this, but you deserve it!”

Sirius held onto the boy’s waist with one hand, fingers framing the fucking sign that meant this wasn’t a person, wasn’t a kid who he should care about—it was just a toy, just a cocksleeve. A free use slut that he could use however he wanted. And he wanted—

Harry broke that thought when he yelled, “You’re lying! You’re always lying! You’ve hated me since before I ever met you based on nothing more than your own pathetic obsession with a man that I can’t even remember! I don’t deserve any of the shit that you heap on me. You’re nothing more than a self-obsessed perverted motherfucker—let me go!”

Snape looked wild. He leaned over the boy and grabbed his head from the back before slamming it down. Sirius kept thrusting even as the boy went limp for a second, then shook his head a little. Snape was already moving back. His voice was too calm for the rage in his eyes when he asked, “You think that I’m the only one who sees you this way?”

“No one else would do this to me—”

“Of course they would. The fact that they haven’t yet is nothing more than a fluke. You‘ve been teasing them all for years now. Every single one of your so-called friends, every one of your teachers, and classmates, the werewolf, your godfather—every single one of them would fuck you if given the slightest opportunity.”

“Shut up!” Harry cried out.

“No, I don’t think I will. This willful ignorance of yours—it’s tedious. If, for example, Black could, he would’ve fucked you years ago. He looks at you and sees a toy—some fun little diversion and nothing more. He would’ve held you down, just like you’re being held down right now,” — and oh God, oh God, Sirius started going faster, rougher; he slapped Harry’s ass as hard as he could when he leaned over the boy, grabbing the roped arms with his other hand and yanking it back so the boy was tugged even farther down Sirius’s aching cock— “and he would’ve fucked you like an animal, rutted against you until you were completely insensate.”

“Sirius wouldn’t do that to me!” And Harry was bucking under Sirius’s grip, “He wouldn’t! This is just you projecting your own—”

“Are you certain? Certain that Black doesn’t desire to fuck you—”

“Yes! I trust him; not like you’d understand anything about that you fucking—"

Sirius couldn’t pretend he didn’t know where Snape was going with this. But it was still a shock when he finally touched Harry; when he grabbed the boy’s chin then reached behind his shaking head and tore off the blindfold.

Sirius couldn’t see what Harry’s face looked like. But he could tell the moment that Harry-- despite not having his glasses on—registered that it was Snape who was in front of him. The boy went completely stiff, tenser than he had been yet. Because if it was Snape who was there…

The boy whipped his head around, trying to get a glimpse at whoever was at his ass. Sirius saw that his eyes were puffy and red—which only extenuated the gorgeous green. When he saw Sirius, those eyes went wide; the bitten-red mouth hung open in shock. Sirius could barely hear a soft, “No…” over the sound of his continued fucking.  

Seeing the miasma of—God—despair and betrayal on the boy’s face, Sirius couldn’t help but groaning, “Fuck…” and grabbing at the boy’s ballsack just for good measure.

He yelped and tightened. But then he turned that tortured face away from Sirius to yell at Snape, “You—what did you do to him? You fucker—what did it take— was it the Imperius—”

Snape had barely said, “You’d like it if—” but Sirius finally had the opportunity to talk so he spoke over the both of them, “No he didn’t. This is all me. Snape may be a bastard but he was right; he was right about all of it. You’re such a goddamn slut…skipping around the house…always asking for more…looking at me with those fucking eyes like you’re begging for it…you’ve done this to me. He’s right: you’re made for this, and it’s time that you realize it.”

The boy whispered, “No, no, no,” but that only made Sirius angry. Acting like he was the victim? All of Sirius’s never-articulated and long-simmering resentments were simmering to his mind. “You don’t get to back out of this now! You took James away from me; it’s your fault I lost more than a decade of my life. And for what? Some idiot who can’t take direction, who isn’t smart enough to do half of the shit that we did in school, who asks for help and then screams when he gets it? Who acts like he’s so much better, more righteous than us? When he’s nothing more than a whore who spreads his legs for Snape of all fucking people? Who’s next? Will you be riding some Death Eater cock? Or going after the big man himself—maybe this is all just a warm-up, huh? Will you let Voldemort himself fuck you next? Find him in some dream and start teasing him like you’ve been teasing me?”

Here, Snape broke in. “That presumes that the slut could even manage to separate himself from his visions which seems more unlikely by the day. He is such an utter failure at the mental arts that it boggles the mind. Which means that the only way out of this is to play to his strengths: fucking him until he’s so incoherent that the Dark Lord wouldn’t be able to glimpse anything from his mind, until the little fucktoy is so focused on serving the next cock that it won’t reveal any secrets…”

And Sirius laughed, breathless and still on the edge of rage, as Harry went limp except for his shaking sobs, “Doing our part for the war effort then!”

Snape snorted and slapped the boy on his cheek. “Not that it’ll take much effort to get it to that state—it’s practically brainless already.” He gripped the boy by the chin and turned his face to the side as though examining an animal. “Let’s turn it over.”

Sirius didn’t want to lose sight of the tramp stamp but he did want to see the boy’s little cock. He decided that even knowing the tattoo was there would be enough.

With a grunt, he withdrew from the ass just long enough to grab the boy’s legs and twist them around. The new position was horrible for the boy: legs awkwardly bunched at the edge of the table in a way that strained the thighs; body bent over still-tied hands. But Sirius ignored any struggles in favor of sinking right back into that sinfully hot hole.

Snape pointed his wand directly at the boy’s face mouth and incanted, “Patulum.” His mouth immediately opened wide. Sirius could see the boy’s chest heaving as he tried and failed to close his lips, but they were stuck open in a gorgeous O.

Snape ran his thumb over the boy’s lips, then stuck two fingers down his mouth until he choked. “Don’t worry,” he crooned, “Soon enough we’ll train that gag reflex out of you, until you’ll be able to take a wand-length without a problem.”

With one hand on the boy’s throat to keep his head back, Snape guided his cock into the boy’s mouth. At first, he thrust shallowly, getting into a rhythm with Sirius as he rocked the boy’s body forward. But soon, Snape was nudging up against the boy’s throat and saying, “That’s perfect. It’s so good like this, just a cocksleeve for me, a warm wet hole to sink into whenever I want. So much better when it’s just here for me to fuck than when it’s talking back or spewing its worthless drivel.”

Sirius moaned slightly, then panted out, “It’s so good like this…such a perfect cumbucket when it’s quiet…not yelling about any of its useless worries…”

“Yes—this is what it was made for. Not being behind the desk of a student, because any instruction goes in one ear and out the other. Certainly, a Hogwarts education is wasted—it will be dropping out here now that no one is enamored by fame.” Then, adopting a faux-sympathetic voice, “Though that doesn’t have to mean the end of its time in Hogwarts. It will be so good here as a toy for all the students…all the staff.”

Snape thrust deep enough that the boy gagged, held it for a moment, then withdrew to the shallow cavern of his mouth. “I could have in my classroom as a decoration hung up next to my ingredient shelves, keeping it plugged in all holes so it doesn’t distract the students that belong to be in a classroom. It’d have more utility as a prize that I could give to students who performed well than a pupil. The best brewer in every period could stuff it full before going to their next class, all the while it stays here. By the end of the day, it would be round with cum, hard, desperate, and leaking. That’s when I would open office hours and every student who was denied earlier that day could come take their frustrations out on the Hogwarts Sex Toy.”

He reached out and rubbed the boy’s nipples, already peaked into hard nubs. After a moment of fiddling with them, Snape grabbed one and cruelly twisted it, digging his nail into the reddened flesh. The boy let out a shriek that was muffled by the cock in his mouth. More importantly, he jolted in a way that squeezed Sirius’s dick just right. That reminded Sirius of why he had acquiesced to the new position, so he slowed down his thrusts, let go of the thighs he had been digging into, and reached for the boy’s half-hard cock.

Now that he was no longer asleep and limp, the size difference wasn’t as clear. But that didn’t mean he couldn’t have fun with it anyway.

Sirius thumbed at the head of the boy’s dick, watching as it twitched and filled a little more. He fondled the balls briefly, liking way the boy’s muscles quivered. Then, without warning, he pulled back his hand and slapped them. There was another aborted scream that Sirius just adored, so he hit them again, then again. Not wanting the boy to get complacent, he took a break and pinched the loose skin of the scrotum.

As Sirius alternated hitting and pinching the boy’s cock and balls, Snape continued to speak: “And what toy wouldn’t like it when its owners use it, even if they’re rough? I’m sure that this isn’t enough for you, greedy little thing. I eagerly await when you’re taking three at once, a couple more surrounding you, making use of your hands and your tits—” another viscous tug— “with two cocks in your ass.”

“Will even that be enough for you? You’ve always needed to be the center of attention. As you get looser and looser and your precious fans get bored of you, what would you do to keep them interested? To keep yourself filled?”

“Will you let them hurt you?” Sirius hit the boy’s balls hard, “Will you beg them to hurt you? Maybe we won’t only chain you to keep you in place. Maybe we’ll chain these lovely tits together. How does that sound? Nipple clamps that bite—“ Snape reached down and pinched both at the same time, “—hard enough that your chest is never unbruised. Did you know that there are potions which increase sensitivity there? I can apply some to your tits before I leave you out, let everyone know to not only bite and pinch, but grab and scratch and clip and add weights until you are out of your mind, sobbing from the sensations.”

“And that’s to say nothing of your little cocklet. The potions are far more versatile for that particular instrument: I could permanently shrink it to a nub no longer than your thumb, I could make it burn every time you came, I could widen your urethra to the point it could take a cock, I could make you cum every single time someone degraded you, or conversely, I could prevent you from ever cumming again.” Sirius dug his nail into the weeping slit of the boy’s full-hard dick and groaned at both the imagery and the tightened hole around him.

“A toy doesn’t need its own pleasure, after all. It exists only to bring pleasure to those that deign to play with it. And if the thing that those people desire is the toy’s pain—well, then it will put forth its very best effort into suffering what it is fucking due.” At this moment, Snape twisted both the nipples between his nails and Sirius yanked the boy’s balls away from his body. There was another gargled scream. But neither Snape nor Sirius failed to notice the boy’s cock twitching and releasing a small spurt of precum.

Sirius let out a laugh that had the boy flinching more than he did for any of the physical pain. “But a little pain doesn’t mean that the toy can’t enjoy itself, eh? Especially if it’s nothing but a cock-hungry little slut.”

“True enough, I suppose.” Snape leaned back a little and held one hand on the boy’s throat. “Is that what you want? To be hurt like you deserve?”

Slowly, Snape started applying pressure to the boy’s throat, even as he jammed his cock further into his mouth. The boy started thrashing in Snape’s grip.

Sirius looked on, entranced, as tears spilled from panicking eyes and the throat bulged with the indent of dick. With one hand on the boy’s waist and the other wrapped tightly as the base of the boy’s cock as a convenient handhold, he started thrusting quick and hard.

Snape suddenly let go and withdrew his dick fully. The boy sputtered then choked on his own drool when he tried to cough with his mouth still held open. Sirius laughed again at the pathetic display. Honestly, even Snivellus as a kid had kept his composure.

After a moment, Snape plunged back in, rougher now as he choked the boy by both cock and hand. With both hands wrapped around the boy’s neck as though Snape were holding a fleshlight, Sirius couldn’t see the boy’s face. What he could see was the notable bump straining against the boy’s skin from the dick taking up all open space in his airway. Each thrust had the boy convulsing, tightening up in a delicious way. Sirius matched the rhythm with abandon.

Snape went to the hilt again and again and again. He groaned as the boy swallowed around him. “You can take so much. Soon it will be both my cock and my balls in that gaping mouth of yours. You can warm me while I’m teaching class. You’ll be cramped in a cage underneath my desk which will be so small, you can’t move your head. Just a hole—nearly part of my furniture—for me to fill however I please. The food you get, the amount you’re used, the very air in your lungs—” Snape squeezed harder around the boy’s throat for a second—“all of it—all of you—under my complete control, at least until I get bored and hand you off to the masses.”

The boy’s struggles were weaker this time. His feet kicked out, but Sirius kept them at such an angle that they couldn’t dislodge him, and the arms still trapped underneath his shaking form could not hit either of them.

Despite the boy’s obvious panic, his cock was stiff beneath Sirius’ punishing grip. Precum drooled from the head, dripping down the hard length to pool around Sirius’ hand, which was slightly gross but mostly hot. It was proof that the boy—the slut, the toy, the fleshlight—was enjoying everything being done to him, even as he struggled against it.

It was as those movements grew faint —and Sirius sped up proportionately, panting now with the desire to fill the fucking slut beneath him—that the boy went lax. A muffled scream came from where the boy’s mouth was still occupied with Snape’s cock, as the rock-hard dick in Sirius’ hand started to cum.

Stripes of white shot across the boy’s chest, covering the bruises which Snape had left splayed there.

He looked utterly debauched. Head still held back so Snape could continue plundering that throat, drool covering his reddening face, hands hidden under a heaving torso, dark nipples hard, cock and balls and ass all red from being hit, legs spread wide to show off a gaping hole stretched around Sirius’ cock, and now, white streaks shoot across tan skin. He looked beautiful.

He looked like a whore. 

Sirius stroked the softening cock and was rewarded with the boy bucking to get away, but between the position and his decreasing oxygen, he couldn’t get the momentum.

Snape withdrew again, leaving the boy to cough and gasp desperately. Before he could get enough air, Snape was back in that shallow cavern. “Ah, but we don’t want you getting too loose now that you’ve come. Just because you found pleasure in your debasement doesn’t mean that it should detract from ours.” He cruelly thrust forward until his balls covered the boys nose and his entire dick was sheathed in the boy’s throat. There he stayed for a beat—two, three—as the boy gagged. Back out again. “Unless I keep my hand on your throat, it’s just too lax for me. I’m sure it’s even worse for your dear godfather who was stuck with that careless ass of yours.”

Sirius grunted in agreement, then slowed so he could say, “It’s so loose back here, so wrecked. I can barely get off like this,” he was going to blow any second, “with a hole this sloppy and used…I can hardly feel it. It could take two dicks before getting tight again…yeah, that’s it: fucking this hole full of cock, until it’s worth something again…”

Snape interrupted, “Well then, Black, since you’re so eager to take initiative, would you like to do the honors of tightening it back up?”

Sirius had the brief, horrifying image of sharing the boy’s hole with Snape. Then he realized what the other man was implying.

Sirius withdrew his wand. Part of him wanted to stick with something like the Stinging Hex or maybe a Burning Jinx but thinking back to the fantasies Snape had woven of pain and use, he knew that he couldn’t stop there. Pointing the tip straight at the boy’s limp cock, Sirius let his boiling resentment and disgusted lust and fierce disappointment roll over him. He said through gritted teeth, “Crucio.”

The boy screamed. Every muscle in his exhausted body went tense. Within that exquisite tightness, Sirius couldn’t resist any longer. He cut off the spell as he came, white behind his eyes, a moan erupting from his chest, fingers digging into the boy’s thighs, shaking apart.

When he had regained enough sense to open his eyes, he saw that Snape had also come. He was withdrawing his spent cock from the boy’s still-gaped mouth and rubbing the cum over the boy’s cheeks. That sent another interested twitch to Sirius’s belly, but he knew he couldn’t get it up again unless potions were involved.

All three of them were breathing heavily, but now that the boy’s mouth was open if not freed, Sirius could hear muffled words that the boy might have been mumbling the entire time, “…’irius, irus, no…no…’lease, ‘lease Siri…”

Snape ran his hand over the boy’s messy face. A thumb rubbed underneath those beautiful verdant eyes. “Yes…this is how everyone should get to see you. Weak, covered in cum, so used…you’re gorgeous like this.” His touch and his voice were very nearly gentle by the end.

With a near inaudible sigh, Snape took a couple of steps back, pulled out his wand and stunned the boy. The flash of red caused Sirius to stumble back. “What are you doing now?”

“I’m going to obliviate the boy—”

“What! Why? We—”

“If you want to rape the slut on your own time and reap the consequences, be my guest, but I refuse to be party to your usual brand of foolishness and sentimentality which would get us both caught by dawn. I will be obliviating him of this memory and you will not stop me. Unless you want to face up to Dumbledore?”

Sirius grumbled, but he could see the other man’s point. He just hadn’t really been thinking about that sort of thing while enjoying the fuck. Still. He had rather liked the idea of Harry thinking about being laughed at in the Great Hall, being chained in the hallways, being used in Diagon, and most of all, being fucked like a toy in the dungeons. It felt like a waste to have that taken away.

Not a complete bust though. Sirius stepped closer once again, drawn by the sight of Harry. He looked utterly wrecked—covered in cum and bruises, passed out and still tied up.

Sirius rubbed his hand over the reddened skin of the boy’s ass, feeling the warmth of soon-to-be bruises radiating off it. From there, he stroked upwards to the boy’s dick and wanked that for a moment, for old times sake. He twisted a nipple, then both of them, and then thinking, why the hell not, he leaned over and took the right one in his mouth, nipping at the peak and biting around it.

Leisurely playing with the boy’s body, it took Sirius a moment to realize that Snape was grinning at him.

“What?” He barked, but Snape just continued to look pleased.

“Don’t I get a thank you?” Snape asked, “Without me, you not only wouldn’t have gotten this moment, but you would’ve been caught the first time you had the boy.”

A thank— “I’m not going to suck your cock!” Sirius growled.

“As if I would ever want your manky mouth. No—merely an assurance that when the boy is back under your power during break, I can make use of him again, outside of Hogwarts where there are less, hm, restrictions.”

“Listen, just have him in for detention or whatever—that’s your problem. You have more access to him that I do!”

Snape waved a hand in a sarcastically magnanimous gesture. “Then surely you can see why I wouldn’t want to give up such a toy.”

“Why the fuck would I let you cut into my time with him?”

Snape smiled almost proudly. “I am glad you asked, Black.”

A shiver of dread ran down Sirius’s spine as Snape summoned—a stack of papers? No, he saw as Snape moved to the other side of Harry’s limp body, not pictures. Photographs.

Moving pictures of Sirius carrying Harry’s limp body, setting him down on the workbench, playing with his hole, fucking him and fucking him and fucking him. Pictures angled to catch Sirius’s hand hitting the boy’s balls, Harry’s face twisted as he yelled, but not Snape standing in front of him. Just Sirius and Harry, Sirius and Harry, Sirius and Harry.

And-holy hell, it was incredible, but Sirius had just let himself be convinced of the need for secrecy and here was Snape threatening that, acting like the bastard that he always was, and Sirius knew—he had known—that it was too good to be true, of course, of-fucking-course Snape had been betraying him even as they fucked Harry together—

“How did you get these?” Sirius asked with a blank voice, as his mind raced to try and find some way out of being blackmailed by the filthy little creep in front of him.

“Monitoring charm when I set up the wards in the classroom.” Of course. Never let a bad opportunity slip by, those Slytherins. “So, Black, what do you say?”

What could he say? He was—so fucking angry; angrier than he had ever been at someone who wasn’t Lily or Peter or Harry.

But.

But, he was also looking at those photographs of Harry squirming and crying and being used and fucked and looking like nothing more than a little toy.

And he wanted that, Sirius realized. He wanted that as more than just an idle fantasy. The thought was consuming him. It was filling something in the hollow center of Sirius Orion Black that had been empty since before twelve years in Azkaban, something that preceded James dying, and the war, and even the mounting hostilities in school—no, that chasm had been there since he was a child fighting with the intent to hurt.  

And while he knew that most of their earlier ideas weren’t exactly feasible—under Dumbledore at least—there were a couple…

“Snape,” Sirius’s voice was slow, pondering. “What do you think about releasing photos of Harry?”

Snape looked shocked, and he clutched the pictures in his hand. “You want me to publicize these—”

“No, no, no!” Sirius interrupted. “Not those photos! None with either of us in them. But we could—I mean—it wouldn’t be too difficult to get some pictures of just Harry: either him naked like this, or sucking cock, or getting a cock up his ass—without the face or body of the person fucking him—and, well…You mentioned Skeeter…morning newspapers…”

Snape still looked a little stunned. “You want to make pornography of your grandson for the express purpose of publishing it in the national newspaper to add to the on-going harassment campaign against him.”

“You were the one who brought it up!”

“Merlin, Black, as dirty talk!”

“No, no—just listen! You hate Harry. He’s insolent, right? Arrogant, always whining about his problems, brash, loud, angry—and he violated your privacy, didn’t he?” Seeing Snape’s face darken and remembering the other part of that story, Sirius quickly rushed on. “He’s like that because he’s always the center of attention. And right now, the papers are just making him feel like a martyr. But if we changed the direction of attack—if he was humiliated instead of angry…God, Snape think about it. Like you said: opening up the newspaper and there it is, articles calling him a whore and a slut…hell, I wouldn’t be surprised if some of the Death Eaters start targeting him for another reason…If all the students upped the ante…”

Snape looked pensive. “You realize that this will impact the war effort?”

Sirius waved a hand. “Sooner or later, the Dark Lord will do something that no one could miss. This is just fun in the meantime. Besides, if anyone’s going to be defeating the Death Eaters, it’ll be people like Dumbledore or me: soldiers, adults, whatever. I can’t say that I think Harry would be able to stand against the Dark Lord.” Here, Sirius swatted Harry’s ass. Both men watched as a glob of cum slid out of the winking hole.

Snape was quiet for another long moment, before saying, “If we do this, I will be in charge. I will not have you recklessly endangering me for the sake of your lust—”

Sirius could have whooped. “Yeah, absolutely, sure.”

“And I will be making use of the boy outside of term.”

“Yeah, sure.”

“And you will not obstruct any of my plans.”

“Okay.”

“And you will never endanger the boy’s life.”

“Yeah, fine.”

“And you will not hurt the boy in any way without my permission.”

“…Fine.”

“Do you vow to all the listed conditions?”

A part of Sirius was reminding him that Snape was a back-stabbing piece of shit. But the majority of him was in a whirlwind of fantasy and memory: the Free Use tattoo, Harry’s twisted face, a gaping hole, the sound of laughter at a boy naked before his peers, chains and clamps and cock rings, reddened skin and green eyes…

And Sirius said, “Yes, I agree.”

Snape extended his hand, and after only a moment of hesitation, Sirius took it. They shook over Harry’s limp, cum-covered form.

And already, new ideas were blooming.