Chapter Text
Stiles hadn’t been feeling right for months. At first, it was easy to write off; fatigue that clung to his limbs like wet cement, a constant dull ache in his legs and hips that he blamed on his terrible posture or the hard library chairs at school. He told himself it was stress. The leftover burn of the Nogitsune still lingered in the corners of his mind some days, like shadows that refused to die. And Derek had left, chasing ghosts in Mexico. That alone had been enough to make everything feel heavier.
So Stiles let it all slide. The exhaustion, the weight loss he barely noticed until his clothes hung looser. The bruises that bloomed too easily. The pain that settled into his bones like an old friend. He figured it was all connected to the recovery after the Nogitsune, or the way Derek had walked away without saying goodbye, just a curt phone call and a promise to “handle it.” As if handling things didn’t always come back to haunt them.
It was his dad who finally pushed. Not with a lecture, but with quiet concern that edged into fear. When he noticed the winces Stiles tried to hide, the half finished meals, the late mornings where getting out of bed looked more like a battle than a routine. One morning, Stiles tripped going down the stairs, his leg just gave out, and that was it. His dad drove him to the doctor without asking if he wanted to go.
Bloodwork. X-rays. More tests.
It was bone cancer. The word hit like the roar of a gunshot, followed by the hush of disbelief. Osteosarcoma, the doctor said. Malignant. Aggressive. Treatable, maybe, if they caught it early enough. If the chemo worked. If the surgery didn’t leave him broken in new ways.
The room had gone quiet after that. His dad’s hand was gripping his so tightly it hurt. Stiles just stared straight ahead, thinking about all the times he ignored the warning signs. All the times he convinced himself it was just grief. Just Derek. Just life.
But it wasn’t.
This was something else entirely. Something real. Something that wouldn’t go away no matter how clever he was or how hard he tried to pretend it didn’t scare the hell out of him.
~~~~
The hospital smell clung to him even after a shower. Sterile, sharp. It was in his skin, in his throat, like the truth of it had settled inside him and refused to let go.
Stiles sat in his Jeep for almost twenty minutes outside Scott’s house, the engine off, his hands shaking slightly on the steering wheel. The words wouldn’t come together. Not in a way that made sense. Not in a way that didn’t sound like begging.
But eventually, he climbed out, walked up the familiar path, and knocked. When Scott answered, his smile faltered the second he saw Stiles' face.
“Hey,” Scott said, concern already etched into his voice. “Are you okay?”
“No,” Stiles said. “Can we talk?”
They sat in the kitchen. The same table where they used to plan lacrosse strategies and battle supernatural threats with research and Red Vines. It felt smaller now. Quieter. The kind of quiet that waits to be broken.
Stiles didn’t dance around it. He laid it all out; what the doctor said, the prognosis, the treatment options, and the worst case scenario that was becoming more and more likely no matter how aggressive they got.
Scott’s face fell with every word. His jaw clenched. His eyes shimmered with tears he refused to let fall.
“I want you to bite me,” Stiles said finally, quietly. “If I turn, I heal. The cancer…maybe it goes away. It’s... a chance, Scott. And right now, I don’t have many of those.”
Scott shook his head before the words even registered fully. “No.”
Stiles blinked. “What?”
“I can’t,” Scott said. “Stiles, you know what it means if you reject the bite. If your body - if it can’t take it - it kills you. That would be my fault. That would be on me.”
“And what if I die anyway?” Stiles snapped, the edge of desperation cracking through his voice. “What if I wither away in some hospital bed, pumped full of poison until I’m too weak to stand? That’s not your fault, though, right? Because that’s natural? That’s better?”
Scott stood, pacing, running both hands through his hair. “I’m not a god, Stiles. I don’t get to decide who lives or dies.”
“You could,” Stiles said, rising from his chair. “You could give me a chance.”
“It’s not a chance,” Scott said sharply, turning to face him. “It’s a risk. A lethal one. And I won’t do that to you. I refuse to.”
The self righteousness in his tone stung like a slap. Scott, always the hero. Always so sure that mercy looked a certain way - soft and passive and bloodless.
“So that’s it?” Stiles asked, voice flat. “You get to sleep at night because you didn’t pull the trigger, even if you watched me bleed out?”
Scott flinched like he’d been hit. “You’re my best friend. I love you. But I can’t turn you into something you might not survive. I won’t gamble your life like that.”
Stiles stared at him, the hollow silence between them thickening like smoke.
“Okay,” he said finally, a bitter smile twisting his mouth. “Thanks for nothing.”
He turned and left without another word.
Scott didn’t follow.
~~~~
The grocery store was quiet, save for the low hum of fluorescent lights and the occasional beep of a scanner from the front. Derek moved through the aisles with the detachment of someone who hadn’t done something this mundane in a long time. A worn black hoodie, the hood pushed down, and a few days' stubble softened the sharpness of his face, but his eyes were the same - tired, wary, haunted.
He hadn’t expected to run into anyone, least of all the sheriff.
Noah Stilinski stood in front of the coffee shelf, one hand on his hip, the other holding a canister he was squinting at. He looked older. Wearier. There was a slump to his shoulders that hadn’t been there before.
Derek didn’t mean to approach. His instincts told him to slip past and vanish. But instead, he spoke.
“Sheriff.”
Noah turned. His eyes widened slightly in surprise, and for a long second, he just stared.
“Derek?” His voice was cautious but not cold. “I’ll be damned.”
Derek offered a small nod, his voice low and rough. “Hey.”
“I thought you were in Mexico. Looking for Kate.”
“I was,” Derek said. “I found her. Took care of it.”
There was something in his tone that was final, heavy, but he didn’t elaborate, and Noah didn’t ask.
“Well,” Noah said, adjusting the canister in his hand. “That’s... good. I’m glad to see you’re back.”
Derek nodded again, but the silence that followed was uncomfortable, almost strained. He started to move past, unsure what he’d been expecting. A handshake? Closure?
“I’m sure Stiles would love to see you,” Noah said suddenly, and Derek stilled.
“Yeah?” Derek asked, something like hope flickering behind his guarded expression.
Noah nodded, then added, “He’s in room 318.”
Derek’s brow furrowed. “Room 318? What do you mean?”
“At the hospital.”
The words hit like a punch. Derek’s breath stalled. “Wait… Stiles is in the hospital?”
Noah blinked, startled. “You didn’t know?”
“No.” Derek’s voice was flat, stunned. “What happened? Is he - what’s wrong with him?”
Noah looked at him for a long moment, and the softness in his eyes shifted into something a little more guarded.
“I thought you two were close,” he said quietly. “I figured you knew.”
Derek swallowed hard. Guilt curled cold in his stomach. “I left on a mission. I didn’t…I wasn’t exactly getting updates.”
“Well,” Noah said, voice gruff but not unkind. “If you want answers, don’t get them from me. Go to the hospital. Ask him yourself.”
Room 318. The number echoed in Derek’s head as he nodded and turned to leave, his heart pounding now with something he hadn’t felt in months; dread.
He came back thinking the worst was over.
But it hadn’t even started yet.
~~~~
The antiseptic smell hit Derek the moment he stepped off the elevator on the third floor. Hospitals always smelled like that; like bleach and fear. The hall was too quiet, too still, and each step toward Room 318 felt like wading through concrete.
He hadn’t known what to expect. Maybe a broken arm, some supernatural injury, even something stupid like Stiles getting hurt in one of his schemes. But when he reached the doorway and looked inside, the breath left his lungs.
Stiles was curled on the bed, pale and far too thin. His hospital gown looked too big on him. There were dark circles under his eyes, and patches of his hair were missing, just enough to notice, enough to make it worse. An IV stand stood beside the bed, bags of fluid slowly dripping into a line that disappeared beneath the thin blanket pulled over his chest.
He looked up, eyes glassy and dull, and blinked in surprise. Then, despite everything, he smirked.
“Dude,” Stiles croaked, his voice raspy and dry. “Way to show up in the middle of my villain origin story. Your timing sucks.”
Derek stepped inside slowly, almost like he was afraid the whole room might disappear. “Stiles…”
“Yeah, yeah,” Stiles said, waving a hand weakly. “Shocking, right? This is not the aesthetic I was going for. I told them I wanted to be, like, cool-sick. Mysterious-sick. Not... ‘falling-apart-like-a-bad-sci-fi-prototype’ sick.”
Derek pulled the chair closer to the bed and sat down, eyes scanning every detail like he couldn’t decide what to focus on. “What’s going on?”
Stiles didn’t answer right away. He looked out the window for a second, his expression tightening, and when he turned back, his voice was quiet.
“Bone cancer,” he said. “Osteosarcoma, to be specific. I’m on my first round of chemo. They started it last week.”
Derek felt like the ground shifted beneath him.
“And it’s going great,” Stiles added with a wry grin that didn’t reach his eyes. “I’ve thrown up twice today, couldn’t keep breakfast down, and-” He gestured vaguely to his head. “This patchy mess is apparently the cool new side effect. But I’m being super stubborn about shaving it. I want it to fall out on its own, like a dramatic movie reveal.”
Derek didn’t speak. His hands clenched on his knees, jaw tight. Anger. Guilt. Grief. All of it stormed beneath the surface, sharp and silent.
“You didn’t know,” Stiles said after a beat, softer now. “It's okay, Sourwolf.”
“No one told me,” Derek said. His voice cracked on the edges, rough and low. “I would’ve come back sooner if I had.”
“Yeah,” Stiles said, leaning back against his pillows. “Well. That’s the thing about life. It doesn’t really wait for you to get your timing right.”
The room fell quiet again, but it wasn’t awkward. It was heavy.
“I’m glad you’re here,” Stiles said finally, his voice small. “Even if it’s too late to shave my head for me.”
Derek huffed a breath that might’ve been a laugh - or a sob.
“I’ll stay,” he said quietly.
“You don’t have to.”
“I know,” Derek said, eyes steady. “I’m staying anyway.”
~~~~
Derek sat by Stiles' hospital bed, absently watching the slow rise and fall of his chest. Stiles had finally drifted off after a rough hour of nausea and restless pain, and the room had fallen into a hushed, sterile stillness.
The phone in Derek’s pocket buzzed.
He glanced at the screen.
Peter.
He debated ignoring it, but the persistent vibration told him his uncle wouldn’t be deterred.
With a low sigh, Derek stepped out into the hallway and answered. “What?”
“Charming as ever,” Peter drawled. “Good to hear your voice too, nephew. I take it you’re back in town?”
“I am,” Derek said flatly.
“Good. We need to meet.”
Derek’s eyes flicked toward the door of Room 318. He could still see Stiles through the glass panel, curled tightly on his side like he was trying to disappear into the sheets.
“If you want to see me,” Derek said, his voice low, “you’ll have to come to the hospital.”
There was a pause. “Hospital?”
“Stiles is here.”
Peter’s tone shifted just slightly, interest sharpening. “What happened?”
“He’s sick.” Derek didn’t elaborate. He didn’t owe Peter details. “I’m not leaving him.”
Another pause. Longer this time.
“I’ll be there in twenty,” Peter said, voice clipped now. “I’ll bring coffee. I assume this is one of those ‘no sleeping, no eating, just brooding’ situations for you.”
Derek didn’t dignify that with a response. He ended the call and slid the phone back into his pocket.
He took one last breath of the stale hallway air and stepped back into the room, his gaze immediately returning to Stiles.
Peter could come to him.
Everything else could wait. Stiles couldn’t.
~~~~
Derek heard the elevator ding down the hall before he smelled him - familiar cologne layered over expensive wool and the always faint scent of scorched earth. Peter Hale walked with the kind of precision that demanded attention even in a quiet hospital corridor. A cup tray dangled from one hand, two coffees nestled inside like peace offerings that were already growing cold.
When he stepped into Room 318, Peter didn’t speak right away. His eyes landed on Stiles; still asleep, curled tightly on his side like a question mark, skin pale and lips cracked. The sight stole the smirk right off Peter’s face. He set the coffee down on the windowsill, silent for a moment too long.
“What happened?” he finally asked, voice low, deadly calm.
Derek didn’t look up. He was seated beside the bed, fingers absently toying with the hem of the blanket. “Bone cancer. Osteosarcoma. He started chemo last week.”
Peter’s expression darkened, brows furrowing in slow disbelief. “And no one told me?”
Derek gave a small shrug. “I didn’t know either until I got back.”
Peter’s hands curled into fists at his sides. “This should’ve been dealt with. Handled. Where the hell is Scott? Isn't this the kind of thing our shiny, all powerful True Alpha was supposed to prevent?”
“I don’t know if Stiles even asked him,” Derek muttered.
Peter’s voice dropped into something sharp and cold. “This is Stiles. He asked. And that good for nothing, sanctimonious, True fucking Alpha must’ve told him no.”
The words exploded out of him like a gunshot, loud and furious enough to rattle the IV stand.
Stiles stirred.
Then groaned.
“Jesus Christ, Peter,” he rasped, not even bothering to open his eyes yet. “Could you yell a little louder? I don't think the nurses on the next floor heard you.”
Peter froze. Stiles blinked slowly, eyes bleary and bloodshot as they focused on him. His mouth twisted into something caught between a smirk and a grimace.
“Well,” he said dryly, “I see you’ve been updated.”
Peter’s jaw clenched. “Why didn’t you tell me?”
“Because I already had one Hale abandoning me,” Stiles muttered, flicking a weak glance toward Derek. “Didn’t feel like doubling the disappointment.”
Peter’s fury faltered, replaced by something bitter and broken. He didn’t speak, so Stiles kept going.
“And he’s right,” Stiles said, voice quieter now but filled with the kind of flat acceptance that made Derek flinch. “I did ask Scott.”
The room went still.
Stiles licked his lips, his hands trembling slightly on top of the sheets. “Told him everything. The odds, the chemo, the pain. That I didn’t want to die like this. He looked me in the eye and said no. Said it was too risky. Said he couldn’t live with himself if I didn’t survive the bite.”
Peter’s face twisted, raw with anger and something dangerously close to heartbreak.
“So now,” Stiles whispered, “I get to die the slow, painful, human way. Because Scott McCall wants to sleep better at night.”
Derek swallowed hard. Peter said nothing, his entire body locked in place.
The silence that followed was suffocating.
Finally, Peter spoke, his voice low and deadly calm. “We’re not letting you die, Stiles.”
“Don’t make promises you can’t keep,” Stiles mumbled, closing his eyes again.
Peter glanced at Derek, eyes hard. “We’ll figure something out. But if McCall doesn’t want blood on his hands, he should’ve kept his head out of his own ass long enough to remember who this kid is.”
Derek didn’t argue.
He just reached out and placed a hand over Stiles’ trembling one, grounding him. Reminding him he wasn’t alone.
Even if it already felt like goodbye.
~~~~
Peter didn’t storm into Deaton’s clinic; he stalked in. Controlled. Composed. Which made it even worse.
Scott looked up from where he was organizing supplies, surprise flickering across his face. “Peter?”
Peter didn’t answer. He stepped inside, the door clicking shut behind him. The room dimmed under the weight of his presence.
Scott tensed. “Is everything okay?”
Peter’s smile was slow and sharp. “You tell me, True Alpha.”
Scott frowned. “What are you talking about?”
Peter took a single step closer. “Stiles Stilinski. Cancer. Chemo. Hospital bed. Room 318.”
Scott flinched. “You found out.”
Peter’s voice dropped. “You let him ask for the bite. And you said no. It shouldn't have been a question. He shouldn’t have had to ask. It should have been a given, a non issue.”
Scott squared his shoulders. “It’s not that simple-”
“No,” Peter cut him off. “It was that simple. He came to you, terrified and dying, and you turned him away because you didn’t want to feel guilty.”
Scott’s jaw clenched. “You weren’t there. You don’t know what he asked-”
“Oh, but I do.” Peter’s voice rose, filled with venom. “He asked to live. And you - the selfless protector, the hero - left him to rot because your precious moral compass might get a little scuffed.”
Scott’s eyes darkened. “If the bite killed him-”
“He's dying anyway!” Peter roared. “At least with the bite, he had a chance! But no. You get to play saint while he fades away in a hospital bed.”
Peter took a breath, voice trembling now with something dangerously close to grief. “He would’ve taken the risk. You didn’t.”
Scott said nothing. Couldn't.
Peter shook his head. “You're not a hero, Scott. You're just a coward in a crown you never earned.”
And with that, he turned and left, without slamming the door, without another word.
Because some truths hit louder in silence.
~~~~
Stiles let out a slow breath. “Do you hate me for asking Scott?”
“No,” Derek said immediately. “I hate him for saying no.”
Stiles finally turned his head. “Would you have done it? If you were an alpha?”
Derek didn’t hesitate. “Yes.”
Stiles blinked. “Even if I died?”
“I’d rather lose you trying to save you,” Derek said, voice rough, “than watch you fade away and do nothing.”
Stiles’ throat worked. “You always say the most messed up romantic things when I look like death warmed over.”
“You don’t look like death,” Derek muttered.
Stiles arched an eyebrow. “Derek. Half my hair is gone. My skin is nearly green. I smell like puke and despair.”
“You’re still Stiles,” Derek said simply. “Still you.”
The silence stretched between them, thick and aching. Finally, Stiles reached out weakly, fingers brushing against Derek’s.
“Stay,” he whispered.
Derek laced their fingers together. “I’m not going anywhere.”
~~~~
The hospital room was a fragile bubble of quiet pain and reluctant hope.
Peter sat in a stiff chair near the window, eyes sharp but tired, watching the slow drip of fluids into Stiles’ IV. Noah was near the bed, gently adjusting blankets or handing over water when Stiles’ trembling fingers reached for it. Derek stayed rooted at the edge of the bed, his presence a silent fortress.
The chemo rounds dragged on longer than any of them wanted to admit. Stiles was weaker after each session, his bright spark dimming like a candle flickering in a cold draft. Derek saw it in the way Stiles’ laughter faltered, the way his body grew too frail to push back against the exhaustion.
One night, after Stiles had finally slipped into a restless sleep, Derek quietly excused himself. He needed to breathe, to wrestle the weight tightening around his chest.
The nemeton was still and sacred under the pale moonlight. Its ancient roots twisted through the earth like fingers clutching memories, and the stump felt like the heart of the forest itself - silent but beating with hidden power.
Derek dropped to his knees before it, the rough bark digging into his palms. Tears blurred his vision, hot and unrelenting.
“I gave up my Alpha status to save my sister,” he whispered, voice breaking, “someone I loved more than anything.”
His hands clenched the bark. “Please. Please give it back to me. So I can save him.”
His body trembled with the weight of his desperation.
“I swear, I’ll be better. I’ll do better. I’ll never take anything for granted again. I’ll build a pack around Stiles - around his good heart, his fierce loyalty.”
The forest seemed to hold its breath.
“Please,” Derek begged, voice raw and shaking. “Please don’t let him die. I can’t lose someone else. The world can’t just exist if Stiles doesn’t.”
He bowed his head against the stump, silent sobs wracking his frame as the night stretched endlessly around him.
The ancient magic of the nemeton pulsed softly beneath his hands, waiting…listening.
The forest around Derek seemed to pulse with a deep rhythm, like the slow heartbeat of the earth itself. His tears dripped onto the rough bark, his body still trembling, when suddenly the air shifted. A warm hum stirred through the roots beneath his palms, subtle but undeniable, as if the nemeton had heard his desperate plea.
A soft glow began to rise from the stump, pale red and silver light weaving through the knots of the wood. Derek felt a steady power surge through him, a familiar current coursing beneath his skin, stronger than anything he’d felt since he’d given up his Alpha status.
The weight inside his chest lifted slightly, replaced by a steady warmth that radiated from deep within. The forest whispered around him, content and knowing.
Derek’s hands rested on the stump, steady now, his breath slowing.
“Thank you,” he whispered reverently, his voice barely audible in the still night. “Thank you for this chance. I won’t waste it.”
He rose slowly, hands brushing over the glowing bark once more before stepping back into the shadows of the trees.
The nemeton’s light dimmed, returning to quiet darkness, but Derek carried the gift of its power with him; burning quietly, fiercely, like a promise.
With renewed strength and purpose, he turned back toward the hospital, ready to fight for Stiles with everything he had left.
~~~~
The hospital corridor was silent except for the steady beep of machines and the faint shuffle of late night nurses making their rounds. Derek’s footsteps echoed softly as he pushed open the door to Room 318.
Inside, Stiles lay curled beneath the thin hospital blanket, fragile and pale. his chest rising and falling in shallow, uneven breaths. Noah sat in the corner, exhaustion etched deep in his face. Peter stood near the window, arms crossed, eyes flicking between Stiles and Derek like a hawk.
“Don’t,” Noah said quietly but firmly. “He needs rest.”
Peter nodded, a hard edge to his voice. “He’s been through enough for one night.”
Derek’s gaze didn’t waver. He stepped closer to the bed, the air around him suddenly thick with a different kind of power, an undeniable, unyielding force that radiated from deep within.
Without hesitation, Derek leaned over and gently shook Stiles’ shoulder.
“Stiles,” he said softly.
Stiles stirred, eyes fluttering open, confusion and fatigue warring in their depths.
Noah’s voice rose, “Derek, please-”
But before anyone could say another word, Derek’s eyes flashed - a brilliant, fierce red that seemed to burn through the dim hospital light.
The room fell utterly still.
Peter’s jaw tightened. Noah’s breath hitched.
Even Stiles, despite his haze of exhaustion, blinked in sudden awareness.
That red glow wasn’t a warning.
It was a promise.
Things were about to change.
Derek’s voice lowered, steady and unshakable. “I’m here. And I’m not going anywhere.”
The glow of Derek’s eyes faded, but the air in the room didn’t return to normal. It stayed charged, like the moment before a storm breaks, when everything is holding its breath.
Peter was the first to speak. “Well,” he said, voice tight with emotion he couldn't fully conceal, “isn’t that a hell of a development.”
He crossed his arms, eyes raking over Derek with a sharp, appraising look; half awe, half something darker, more desperate. “You went to the nemeton, didn’t you?”
Derek nodded once.
Peter let out a slow breath, almost reverent. “You begged the earth for power.” He looked at Stiles, then back to Derek. “For him.”
There was no snark in his voice now. Only something raw and heavy.
Noah, still seated, ran a hand down his face, trying to process the shift. “You gave it up once to save someone you loved,” he murmured. “And now you’ve taken it back to save my son.”
Derek turned toward him. “I’ll protect him with everything I have. I swear it.”
Noah’s eyes glistened, but he didn’t speak right away. His gaze drifted to Stiles, his son, his whole world, looking so tired and small in that hospital bed. Then back to Derek, standing taller, stronger than he had in months, glowing with something old and powerful.
Finally, Noah nodded. “Then do it. Save him.”
Stiles blinked slowly, still trying to chase away the fog of sleep. “Wait…you’re an Alpha again?”
Derek’s lips tugged into the smallest, softest smile. “Yeah.”
Stiles stared at him for a long moment. “You’re such a dramatic bastard.”
But his voice cracked as he said it.
Derek reached for his hand.
Stiles didn’t let go.
Neither did Peter. Nor Noah.
And in that room, for the first time in weeks, it felt like hope wasn’t just a cruel trick. It felt like the fight wasn’t over.
It felt like pack.
~~~~
The days that followed weren’t easy - far from it. Stiles was still weak, still fragile, but something had changed. Derek’s presence didn’t just offer comfort; it felt like a balm, like a thread pulling him back from the edge every time the pain tried to drag him under.
Peter noticed it first. “His vitals stabilize faster when you’re here,” he murmured one night, watching as Derek sat beside Stiles, their hands loosely entwined.
It wasn’t just emotional, it was supernatural. Derek, now Alpha again, carried with him the steady hum of power, and Stiles, no matter how skeptical or sarcastic he acted, seemed to breathe easier when Derek was near.
The bond between them deepened quietly. It wasn’t about words. It was in the way Derek’s hand found the back of Stiles’s neck when the nausea hit, grounding him. In the way Stiles leaned into Derek without even thinking, his body instinctively recognizing safety. It was pack, unspoken but unmistakable.
By the second week, Peter pulled Derek aside. “You could anchor him. Through pain. Through the sickness. Through the bite.”
Derek didn’t argue.
That night, when it was just the two of them, Noah had gone home to shower, Peter had slipped out to “find decent coffee”, Derek sat on the edge of the bed. Stiles looked worse than he had since the treatments began, his face pale and thin, the dark circles under his eyes sunken deep.
Still, his mouth quirked at Derek’s worried frown. “You’re gonna make those eyebrows permanently stuck that way.”
Derek huffed a laugh, but didn’t smile. He reached for Stiles’s hand and held it gently.
“I can feel it,” Derek said softly. “You slipping. And I can’t - I won’t just watch that happen.”
Stiles blinked up at him, confused and tired. “What do you mean?”
“I’m an Alpha again. I can give you the bite. I'm sorry it took so long for me to suggest it. I was hoping you'd gain a bit of strength back. But I don't want to wait anymore.”
Stiles froze, eyes widening. “You’d… you’d do that?”
Derek met his gaze, voice unwavering.
“I’m only an Alpha because I begged the powers that be to let me save you. I told them I’d build my pack around you. Around your heart. Your mind. You.”
The silence stretched between them, thick with meaning and a hundred unsaid things.
Stiles swallowed hard. “And if I reject it?”
“Then I’ll be with you until your last breath,” Derek said quietly. “But I don’t think you will. I think your body’s fighting this because you’re not done yet. Not even close.”
Stiles blinked fast, tears slipping silently down his cheeks.
“Okay,” he whispered. “Okay.”
Derek squeezed his hand. “So… when?”
Stiles gave a watery laugh. “You’re really gonna let me pick the moment I get fangs and possibly puke my guts out?”
Derek smirked. “You’d do the same.”
“Yeah,” Stiles whispered, smiling through the tears. “I would.”
~~~~
The decision wasn’t made lightly.
They took a day, just one. A quiet twenty four hours where the gravity of what they were about to do settled in each of them like dust in sunlight: slowly, inescapably, undeniably.
The hospital room had become more than a sterile box of wires and machines. It was a war room now. A sanctuary. A den.
Peter brought in fresh clothes for Stiles, sweats that didn’t reek of antiseptic and something resembling real food. “Not your last meal,” he said dryly, setting down a container of chicken and rice. “But something less pathetic than pudding cups if it is.”
Stiles chuckled weakly. “Thanks, Uncle Sass.”
Peter rolled his eyes but didn’t argue. He couldn’t. Not when he kept catching glimpses of the boy too pale, too quiet, too thin, and knowing he should’ve been there sooner.
Noah stayed close. He didn’t talk much, but his hand rarely left Stiles’s shoulder. He watched everything. Every wince, every tremor, every lingering glance between his son and Derek.
“You’re sure about this?” he asked quietly one evening as Derek stood with him by the window.
“I am,” Derek said, staring out into the city lights. “But it’s not my call.”
Noah followed his gaze for a moment. “He’s been through more than any kid should. And I don’t like the idea of him going through even more. But…” His voice cracked. “But I can’t lose him either.”
“You won’t,” Derek promised, low and firm. “Not if I can help it.”
Stiles sat up that night on his own, his body shaking but his eyes steady. “I want to do it tomorrow.”
Peter blinked. “You’re sure?”
Stiles nodded. “I want one last night with all of you. And then I want to fight.”
Derek didn’t sleep. Neither did Peter or Noah. They took turns sitting at Stiles’s side. Derek never left the room. His hand stayed near Stiles’s, just close enough to touch, if needed.
That night, they talked. About stupid things. Favorite Star Wars movies. The time Peter accidentally scared a Girl Scout troop off the Hale property. The time Noah caught Stiles sneaking a stray puppy into the station for warmth during a snowstorm. They laughed until Stiles wheezed.
Then it was quiet again.
At some point, Noah put a hand on Derek’s shoulder. “He believes in you,” he said. “So do I.”
Peter, of all people, leaned down and pressed a kiss to Stiles’s temple. “You come back, you little gremlin.”
“I will,” Stiles whispered, trying to believe it.
Derek stayed with him until the first blush of morning filtered through the blinds.
They would do it at sunrise.
Just four of them. A mismatched, bruised, stubborn family.
~~~~
It was still dark when Peter slipped through the hospital corridors, moving like smoke, like something half feral and entirely out of place in the sterile, fluorescent quiet. The nurses’ station was quiet, night shift dulled by routine. No one noticed him pass.
Room 318’s door opened with a soft click.
Stiles was already sitting up, sweatpants on, hoodie half zipped, face pale but determined. His IV had been removed earlier in the evening with Noah’s help, and Peter had timed everything down to the minute. The car was already parked in the alley behind the building, engine running, heat on low.
“You ready?” Peter asked, voice low.
Stiles nodded, clutching a backpack full of essentials: medications, water bottle, a blanket. One of Derek’s shirts was tucked at the bottom, though he hadn’t told Peter that.
“I feel like we’re breaking the law,” Stiles whispered as Peter eased him up, careful with the way Stiles leaned into him.
“We are,” Peter muttered, slipping his arm around Stiles’s waist with practiced ease. “But who cares? The law’s never been particularly good at saving people like us.”
The elevator was too risky, so they took the stairs slowly, one painful step at a time. Peter moved like a shadow, steady and silent, letting Stiles rest against him during each pause to catch his breath. Stiles didn’t complain. He didn’t need to. Peter could feel the tremble in his muscles, the heat behind his skin. He was still sick. Still slipping.
But not for long.
When they reached the parking lot, Peter guided him into the passenger seat of the black SUV with gentle hands. He buckled him in like it was second nature, then slid into the driver’s seat and peeled away from the curb, headlights off until they were out of sight.
The silence was companionable. Stiles stared out the window, watching the town he grew up in pass by in a blur. He looked tired, but more alive than Peter had seen him in weeks. Hope did that. Derek did that.
After a while, Stiles broke the quiet.
“Thanks for this.”
Peter glanced over at him, one brow raised. “You’re thanking me for kidnapping you from the oncology ward?”
Stiles snorted. “Yeah. Kind of.”
Peter looked back to the road, his smirk softening into something smaller, more honest.
“I’d do anything for you, kid.”
Stiles blinked, caught off guard by the rare sincerity.
Peter kept his eyes forward, but his voice was quieter now. “You’re not just the Sheriff’s son. You’re not just the loudmouth who survived the Nogitsune. You’re pack. Mine. Derek’s. And you matter.”
Stiles didn’t reply. He couldn’t, not with the lump forming in his throat. Instead, he leaned his head against the cool glass of the window and whispered, “I know.”
They turned onto the quiet street where the Stilinski house sat, porch light glowing. The curtains in the living room were drawn back, and through the window, Stiles could just make out Derek moving inside, clearing the coffee table, laying out blankets, placing a basin of water and clean towels beside a small cot near the fireplace.
Getting ready to save him.
Peter parked, cut the engine, and turned to him. “Come on. Time to go home.”
And for the first time in what felt like forever, Stiles believed it.
The house was warm when Peter guided Stiles inside, the scent of pinewood and clean linen wrapping around him like a memory. The fireplace crackled low, casting golden light across the living room where Derek had prepared everything with quiet precision. A thick blanket had been laid out on the couch, pillows fluffed just right. A basin of water sat nearby, along with towels and a spare shirt. A cot by the fireplace in case Stiles chose to lay there.
Derek was crouched by the hearth, adjusting the flames when he heard them come in. He turned, eyes catching on Stiles; and for a moment, he just breathed.
Stiles looked tired. Fragile. But he was here. He had chosen to be here. And somehow, that steadied Derek more than anything else could.
Peter gave them one last glance before disappearing upstairs with a muttered, “I’ll be nearby if you need anything.”
The room fell into stillness.
Stiles shifted his weight, trying not to look as nervous as he felt. Derek moved to him and guided him gently to the couch, helping him sit, then knelt in front of him.
For a moment, they just looked at each other.
“I should be scared,” Stiles said, voice quiet. “But I’m not.”
Derek searched his face. “Why not?”
Stiles smiled a little. “Because it’s you.”
Derek swallowed hard. “You don’t have to do this if-”
“I want to live,” Stiles interrupted, the smile fading but the fire in his eyes sparking again. “I want more. I want to wake up tomorrow and not feel like I’m on borrowed time. I want to figure out what it means to be part of something again. I want to know what comes after this.”
His voice broke a little.
“And I want you to be part of it.”
Derek looked down, blinking against the sudden wetness in his eyes.
“I’m not good at promises,” he murmured, “but I’ll protect you. I’ll teach you. I’ll be there for every part of this. Even the hard ones.”
Stiles nodded, voice soft. “I know.”
Derek took his hand. “It’s going to hurt.”
“I know that too.” Stiles squeezed his fingers. “But it’s the kind of pain that means something.”
They sat in silence for a long moment, the fire popping softly beside them, shadows flickering along the walls.
Then Stiles leaned forward, pressing his forehead to Derek’s.
“I’m ready.”
Derek pulled back just enough to meet his eyes. “Then I’m with you. Every step.”
The house had quieted. Peter lingered upstairs, giving them space. Derek waited by the fireplace, respectful and patient, though his whole body hummed with tension.
Stiles sat in the corner of the couch, shirtless but wrapped in a blanket, the firelight painting soft lines across his gaunt face. His breath came slow, deliberate, the exhaustion of chemo still clinging to him, but his eyes were clearer than they’d been in weeks.
Noah sat beside him, one hand loosely curled on his knee. He didn’t speak. He didn’t need to. His presence alone was grounding.
“I need to tell you something,” Stiles said after a long silence, his voice hoarse but steady.
Noah turned to look at him, already feeling the heaviness of what was coming. “Okay.”
Stiles swallowed and turned toward his father fully. “I don’t think I ever told you enough… just how much I love you. Like, really love you. Not just the kind of love that comes standard because you’re my dad. I mean... you. The person.”
Noah’s eyes softened, his throat working as he tried to keep his expression steady.
“You’ve always been there,” Stiles continued. “Even when you didn’t understand everything I was doing or why I was doing it. Even when things got really dark after Mom died. You just kept showing up. You never gave up on me.”
Noah reached over, wrapping his hand gently around Stiles’s wrist. “It’s my job to be there, kid.”
“I know,” Stiles whispered. “But you did it even when it hurt. Even when I didn’t make it easy. And… I just need you to know…whatever happens next, I’ve never taken you for granted. Not for one second.”
Noah’s eyes shone, and his grip tightened slightly. “You don’t get to talk like you’re saying goodbye.”
Stiles gave him a small, sad smile. “I’m not. I’m just… making sure you know. Before everything changes. Before I’m not just your kid anymore, but someone new. I don’t want there to be a single doubt in your heart about how much I love you.”
Noah leaned forward and pulled Stiles into a gentle hug, careful not to press too hard against the fragile frame he still held onto.
“I know,” he said, voice rough with emotion. “And you’ve got nothing to prove, Stiles. You’ve always been more than enough. I’m proud of you. I’m so damn proud of you.”
Stiles closed his eyes, breathing in the familiar scent of his father’s aftershave and the faint trace of old coffee that always clung to his clothes. Safe. Steady. Home.
“I love you, Dad.”
“I love you too, kiddo. Always.”
They held on just a little longer before finally letting go, the fire still crackling beside them, the weight of the moment sinking deep into their bones.
Soon, everything would change.
But this, them, was unshakable.
Derek moved with deliberate care, laying out the last of the clean towels, the gauze, the bowl of water. It felt like a ritual. Sacred. A quiet preparation for something that was going to change both of them forever.
His hands didn’t shake, but the pressure in his chest tightened with every breath.
This wasn’t just a bite. It wasn’t just about turning Stiles to save his life. It was about trust - raw, terrifying trust. Stiles was giving him everything, handing over his fragile, broken body and saying, I believe you can carry me through this.
And Derek had to be strong enough to do it.
Please, he thought, not to the Nemeton this time, but to something deeper. Let this work. Let him survive. Let me deserve him.
He looked up when he felt the shift in the room. Stiles had moved, pushing himself up to sit straighter, the blanket slipping from one shoulder. His skin was pale and clammy, but his eyes, those bright, stubborn eyes, were fixed on Derek with unwavering clarity.
“I want it on my shoulder,” Stiles said quietly.
Derek froze.
His heart stuttered. Slowly, he straightened from where he’d been kneeling. “Do you know what that means?”
His voice was rough, low, almost reluctant to speak the truth out loud.
Stiles didn’t hesitate. “Yes.”
For a moment, Derek couldn’t breathe. He could feel the gravity of it pulling at his ribs, the weight of what Stiles was asking. A shoulder bite wasn’t just about turning someone. It wasn’t about survival. It was about claiming. It was about choosing. It was a bond forged in intention, something rare and rooted in something far deeper than instinct.
It was a mate bite.
Before Derek could speak again, Peter’s voice echoed from the top of the stairs.
“This is Stiles,” Peter said dryly, coming down with his usual smooth confidence. “Of course he knows.”
Stiles rolled his eyes affectionately, then looked back at Derek with quiet seriousness.
“Will you do it?” he asked.
And there it was.
No drama. No theatrics. Just a question from someone who had lost almost everything, and was still choosing him.
Derek stepped forward, his chest tight with emotion. He stared down into Stiles’s face, seeing the fading shadows of pain and illness, and the blazing core of the person he had come to love more than he thought he was capable of.
“Yes,” Derek said, his voice rough with reverence. “I will.”
Peter said nothing. He just moved to the other side of the room and watched, silent and still, like a sentinel.
Noah didn’t interrupt. He sat on the edge of the couch, hands clenched together, lips pressed tight, but he nodded, just once.
Stiles turned, baring his neck.
And Derek knew: nothing would ever be the same after this.
Derek’s hands hovered just above Stiles’s skin, the firelight casting his red eyes in molten shadow. The house was quiet, breathlessly so, like even the walls knew this was something changing.
He could feel the warmth of Stiles’s skin, could smell the faded traces of chemo, the tang of exhaustion, and beneath it all… that thread of familiar scent that had always been Stiles; salt, earth, adrenaline, and defiance.
Stiles’s bare shoulder and neck was exposed. He didn’t flinch under the touch of Derek’s hands. He didn’t look away.
“Last chance,” Derek said, voice rough and low. “You can still say no.”
Stiles smirked - tired, crooked, but still him. “Bite me, Derek.”
A breath escaped Derek’s chest; part laugh, part heartbreak, and then he leaned in.
He pressed his lips to Stiles’s skin first, reverent, grounding himself. Then his fangs slid down, slow and sure, and he sunk them into the curve of Stiles’s shoulder, where neck met muscle, where bonds were made and sealed in blood and power.
Stiles gasped, sharp and sudden. His body arched off the couch with the shock of it. The pain was instant, burning like wildfire under his skin, flooding through his veins. It was too much and not enough, foreign and familiar all at once.
Derek held him steady, arms wrapped around him, fangs buried deep, whispering silently through the contact, Come back. Come through. Stay with me.
The taste of blood was bitter and wrong at first, cancer-tainted, laced with the lingering tang of chemo, but underneath it was Stiles. His essence. His fire. And Derek poured every ounce of his power into the bite, sending the Alpha spark flooding into him, commanding his body to change, to heal, to survive.
Stiles trembled, convulsed once, and let out a cracked, agonized scream.
Peter moved fast, catching his legs as they kicked out. Noah was at Stiles’s head in seconds, holding his face, whispering his name like a prayer.
“It’s okay. it’s okay, I’ve got you,” Noah said, eyes full of tears.
The magic took hold slowly.
There was no blinding light. No scream of shifting bones. Just the sound of Stiles’s heartbeat, fluttering fast and wild - then steadying, slowly. His skin flushed with a rush of heat. His breath hitched, then evened out.
The wound bled but didn’t clot immediately. Derek licked it once, the way instinct told him to, sealing the bond even if the transformation hadn’t yet finished.
Peter stepped back and watched from the shadows, not speaking. Noah’s hands were clenched into fists, eyes wet and locked on his son.
Stiles slumped back, breath ragged, skin damp with sweat. But he didn’t pass out. He didn’t seize again. He was still there, eyes wide, blinking up at Derek with shock, awe, and something that might’ve been wonder.
“I… I don’t feel dead,” he said hoarsely.
“You’re not,” Derek said, crouching beside him. “You didn’t reject it.”
“It’s not done though, is it?”
“No. It’s starting.”
Stiles nodded slowly, then leaned into Derek’s shoulder, too weak to stay upright. “Good. Because dying was getting boring.”
Derek let out a quiet breath, pressing his forehead to Stiles’s hair.
“You’re not going anywhere,” he whispered. “Not anymore.”
Behind them, Noah exhaled a sob. Peter looked away, jaw tight.
Hope had entered the room.
And it wasn’t leaving.
~~~~
The first twelve hours were agony.
Stiles drifted in and out of sleep, drenched in sweat, his skin burning from the inside out. His body trembled with a fever that no blanket could soothe, muscles spasming under the strain of something primal taking root. It was like being rebuilt from the marrow out. Every nerve lit up, every bone screamed.
But Derek never left his side.
Peter paced at the edges of the room like a caged animal, occasionally checking Stiles’s pulse, his temperature, the steadiness of his breathing. Noah barely slept, sitting in the old armchair with his head bowed and hands clasped, eyes constantly flicking to his son with a father’s desperate helplessness.
Then, sometime just after sunrise, Stiles stirred.
Not the weak twitch of someone coming out of fever, but a conscious shift. He blinked, then slowly sat up, shoulders stiff, breath shallow.
Derek was there instantly, hand at his back. “Easy. Don’t push it.”
Stiles exhaled shakily. “I… I’m starving. Like, murder-a-cow hungry.”
Peter let out a short, relieved laugh, but it was Noah who moved first, grabbing a granola bar from the kitchen counter. He practically threw it at Derek, who tore it open and handed it to Stiles.
Stiles took one bite and groaned like it was the best thing he'd ever tasted. “Okay, that’s definitely a good sign.”
“You’re stabilizing,” Derek said, voice low, intense. “It’s working.”
Stiles nodded slowly, eyes clearer than they’d been in weeks. His skin had a flush now; faint, but real. His hands, while still trembling, had a strength in them he hadn’t felt since the diagnosis.
“I don’t feel like a werewolf,” he murmured. “Shouldn’t I want to run through the woods and howl at the moon or something?”
“That’ll come later,” Peter said dryly from the couch. “Right now, your body’s still adjusting. It’ll take time.”
Stiles flexed his fingers, then looked down at his legs. “I want to stand up.”
“Stiles-” Derek started, but Stiles was already moving, slow and clumsy, but determined.
He swung his legs off the couch, gripping Derek’s arm like a lifeline. His knees buckled, and for a split second, it looked like he’d collapse, but Derek caught him, both hands steady around his waist.
Stiles looked up at him, lips twitching. “You gonna hold me the whole way, or let me fall dramatically?”
Derek stared at him. “You fall, I’m catching you.”
“Fair.”
He took one shaky step forward. Then another.
Every movement was stiff and awkward, like he was wearing a body not quite his own, but he was moving. He wasn’t curled up in a hospital bed. He wasn’t too weak to lift his own head. He was walking.
Noah watched with tears in his eyes. Peter crossed his arms but didn’t hide the relief in his face.
Stiles made it halfway to the fireplace before he stumbled.
Derek caught him immediately, holding him against his chest, strong and warm and safe.
“I got you,” Derek whispered.
Stiles didn’t pull away.
“I know.”
~~~~
The first time Stiles felt the world differently, it hit him like a wave.
It was three days after the bite. He was sitting on the back porch of the Stilinski house, bundled in one of his dad’s old hoodies, holding a cup of tea that he swore still tasted faintly like cardboard. But then the breeze shifted.
And suddenly he smelled everything.
Wet pine, old leaves, the sharp metallic tang of the nails in the porch wood. The warm comfort of Derek, sitting silently beside him. The burn of cinnamon from Peter’s cologne inside the house. The grounding scent of Noah - coffee, laundry detergent, and worry - still lingering in the doorway.
Stiles blinked. “Is this what it’s always like?” he asked, voice barely a whisper.
Derek nodded. “It fades into the background, eventually. But at first, it’s a lot.”
“It’s everything,” Stiles said, awestruck.
He felt the shift coming before it actually happened, like the air had thickened around him. His pulse kicked up. His vision sharpened. His skin crawled with some strange, electric pressure, just under the surface.
He gripped the porch rail. “Derek… something’s happening.”
Derek turned to him immediately, eyes flashing red for a heartbeat as he assessed him. “Breathe. You’re not shifting, not fully. But your senses are waking up. Your body’s adjusting.”
Stiles turned wide, wild eyes on him. “I can hear your heartbeat.”
“Good.”
“No, like actually hear it. It’s steady and deep and a little bit smug.”
Derek blinked. “What?”
“You’re smug,” Stiles said, a grin forming. “Smug heartbeat. It’s weirdly comforting.”
Peter appeared in the doorway, leaning against the frame with a slow, impressed smirk. “First his sarcasm, then his senses. He really is healing.”
“Don’t act so surprised,” Stiles shot back, still gripping the railing like it he float away.
Peter’s expression softened just a touch. “Not surprised. Just relieved.”
Noah came up behind him, holding a Tupperware container. “He’s been eating like a starving raccoon. I’m running out of leftovers.”
Stiles turned toward his dad, eyes bright. “You love me.”
“I feed you,” Noah said. “It’s the same thing.”
Everyone chuckled, even Peter.
And just like that, the weight in the air lightened.
They were still afraid. Stiles wasn’t fully out of the woods, he had to ride out the transformation, let the wolf settle, find his balance between man and beast. But every day, he was stronger. Sharper. More himself.
That night, the pack, small as it was, gathered around the fireplace. Derek sat beside Stiles on the couch. Peter leaned on the armrest with his usual sardonic detachment, but his eyes never strayed far from his nephew or his favorite not-so-human Stiles. Noah brought blankets and warm cider and pretended not to hover.
And when Stiles yawned, stretching like a cat and curling into Derek’s side without thinking, Derek pulled him close and rested his chin on his head.
“I’m not afraid anymore,” Stiles mumbled, voice already half asleep.
Derek tightened his arms around him. “Good.”
“I’m still snarky though.”
Peter chuckled. “We wouldn’t survive if you weren’t.”
~~~~
It was exactly one week later.
Stiles woke up before dawn, feeling light, whole - alive in a way he hadn’t known was possible just days before. The ache in his bones was gone. The fog that had clung to his mind lifted. His senses hummed in harmony, no longer overwhelming but vibrant and clear.
He sat up in bed and stretched, the cool morning air brushing against his skin through the cracked window. The world was sharp, vivid, and his.
He found Derek in the living room, sitting on the couch with his shirt half unbuttoned, eyes closed, breathing steady.
Stiles crossed the room without hesitation.
Without thinking.
He pressed a soft kiss to Derek’s lips. a simple, slow touch, but loaded with everything he couldn’t say.
Derek’s eyes flew open, a slow smile curling on his lips.
Stiles’s voice was quiet but sure. “I want to bite you.”
Derek blinked, breath catching like he’d been punched in the chest.
“Why?” Derek asked, breathless.
Stiles shrugged, a small, shy smile breaking through. “I’m not sure. It’s… something I want. Something my wolf wants.”
Derek’s pulse thundered in his throat. His hands shook slightly as he peeled off his shirt, muscles taut and exposed to the cool air.
He reached for Stiles’s face, cradling it gently but with an urgent need. He pulled Stiles’s mouth down to the soft hollow of his neck, voice almost a whisper, trembling with hope and desperation.
“Then bite me,” Derek begged. “Complete it. Let me be yours, as you are mine.”
Stiles hesitated, breath warm against Derek’s skin.
Then, without fear, without doubt, Stiles sank his teeth in.
The bite was different this time.
It wasn’t desperate or uncertain like the first. It was purposeful. Slow, sure, a promise spoken in blood.
Derek’s breath hitched, the warmth of Stiles’s teeth pressing into his skin igniting something fierce and raw inside him. His hands tightened on Stiles’s waist, grounding them both, holding on as if letting go would unravel everything.
A low, vibrating hum thrummed beneath their skin, deep and powerful. The air around them seemed to shift, charged with something primal, electric.
Stiles pulled back slightly, eyes bright and searching. Derek’s red gaze met his, blazing with a fierce tenderness.
“You did it,” Derek whispered, voice thick with awe. “You accepted me.”
Stiles smiled, breath shaky but steady. “I don’t think I ever had a choice.”
Their breaths mingled, hearts pounding in sync, the world narrowing until it was only the two of them.
Derek pressed a soft kiss to Stiles’s temple, then down the curve of his neck.
“We’re mates,” Derek said, voice low and certain.
Stiles nodded, a laugh breaking free; a shaky, happy sound. “Yeah, we are.”
For the first time in months, fear and pain felt miles away.
There was only this. Connection, hope, and the fierce promise of never letting go.