Work Text:
Raph lets out a soft whimper as Donatello forces the thick dildo into her soaked slit, the muscles spasming around the massive toy, her concealed cock throbbing in her slit as her back arches.
"Nnngh... M-Mommaaaa... s-so fullll..." She moans softly, her hips bucking involuntarily as Donnie just purrs and slowly grinds the toy deeper, leaning down to press a soft kiss to Raph's chubby tummy, delighting in the way the softened cartilage yielded beneath their lips. God they're so glad Mikey's been stuffing their sweet girl full with such rich, fatty foods...
"That's it, darling... You're taking this so well, baby doll..." Donatello purrs as they look up at their girl with hooded, lustful eyes. Raph just whines, her thick thighs trembling around Donnie's shoulders.
"Mmm... Momma... m-move... p-please..." Her voice is so soft and pleading, how could Donnie ever resist?
Donatello pulls the dildo out until just the tip remained in Raph's sloppy cunt, before shoving it back in hard, their grip on the base of the dildo tight as they plunge it quickly in and out as their sweet girl writhed beneath them.
"Like this, sweetheart? Do you like it when Momma fucks your pretty little cunt all rough~?"
Raph is out of her mind, mouth open, tongue lolled out as she drools and writhes and moans like a whore beneath Donnie, the soft swells of her breasts bouncing in her cute lacy pink bra, each thrust of the dildo ricocheting through her soft body.
"F-Fuck! Y-Yessss yes Momma! Feels- feels so good!"
Donnie smirks and pounds the toy in harder, their free hand reaching up to shove Raph's bra up, releasing her tits that had been forming over the months she'd been on estrogen, as well as the years Mikey had been feeding her and fattening her up.
"Good girl~ You're such a sweet little bimbo... Can you say that for me, sweetie? Can you tell Momma how much of a pretty slut you are?" Donnie grins, watching as Raph covers her face with her hands shyly even as the thick toy she begged her Momma for is pounding in and out of her perfect little cunt.
"Nnn... mm... R-Raphie's... M-Momma's p-pretty s-slut..."
Donatello spanks Raph's fat ass hard and shoves the toy deep inside of her, grinding it hard against the base of her concealed cock as Raph chokes.
"Uh-uh~ No need to be shy now, darling... You're the one that begged me for this~ I think it's only fair you said what you are~" Donnie's free hand gropes roughly at the bouncing mounds of Raph's tits, squeezing them and running a thumb over the apex where Raph's softened plastron is the most sensitive.
"H-Hah-! M-Momma! S-So d-deeppp!" Raph's whining, shaking, and Donnie lets out a dark chuckle, leaning up to teasingly bite Raph's cheek, grinding the dildo in harder, their other hand still squeezing and kneading at their big sister's tits.
"Oh I know it is, honey~ But remember, baby doll, you still have something to say to Momma~" They watch as Raph's cheeks somehow flush deeper, and when she whines and shakes her head, eyes squeezed shut and plump bottom lip caught between her teeth, Donatello growls. Their hand releases Raph's tit, instead moving to spank her ass again. Hard.
"Wrong answer. Are you going to be good, or do I have to punish you? Speak up, slut. I'm waiting." Donnie snarls, a dark thrill running through them as Raph yelps and lets out a little sob at the stinging slap to her plump ass. And she gives in.
"N-No! R-Raphie'll be good! B-be s-so good for Momma!"
Donnie grins darkly, their hand moving back up to Raph's face, gripping her jaw and forcing the snapper to look at them.
"Good girl~ Now speak, puppy. Before I lose my patience."
Raph whines, her back arching as Donnie grinds the toy right against the base of her hidden cock, feeling the hard length throbbing and aching to drop.
"R-Raphie's... Raphie's a good b-bimbo for Momma... p-pretty slut..."
Donnie purrs sweetly at Raph's submission, and their grip on their sweet girl's face softens, gently cupping her cheek and wiping away her tears with their thumb.
"There you go... Now that wasn't so hard was it, sweetie? You're such a good girl for me... Momma's going to take such good care of you~"
And with that, Donatello is thrusting the dildo hard inside Raph's cunt again, shoving it deep with each thrust as Raph whines and squirms and moans like the pretty bimbo she is beneath her Momma.
Then, something inside her shifts, and her cock drops partially, the tip peaking out from between her plump slit lips. Donnie looks down, eyes widening, and they churr deeply, reaching a hand down to rub their thumb over the reddened flesh, feeling it twitch and throb beneath their touch.
"Would you look at that... Raphie's pretty little clit has come out to play~ You're so cute, baby girl..~" They press their thumb against the tapered tip of their mate's cock, before rubbing it fast as they grind the dildo into their pet, rubbing her clit in much the same way they rub Leo's.
Raph moans whorishly, hips shifting into the touch, head tipped back as she takes everything her Momma gives her, feeling her orgasm rapidly approaching.
"Mmm! M-Momma! G-gonna-! Raphie's gonna c-cum!"
Donnie grins, rubbing their mate's clit faster, fucking the dildo deeper, licking a stripe from Raph's cute, pudgy tummy, to her fat tits.
"Yeah, sweetheart? You're gonna cum while Momma rubs your pretty little clit and fucks your sweet cunt~?" They know exactly the effect their words have on Raph, they know of the euphoria and affirmation warming her soft body.
"Y-yes! P-please, Momma, can I cum? I- I've been good Momma please!" Her voice is so sweet when she begs...
Donnie makes a show of thinking, humming softly, brow furrowed in contemplation, before they smile and nod, shoving the dildo in hard one last time and swiping their thumb over Raph's clit.
"Go ahead, honey~ You can cum, baby doll. You have permission~"
Barely a moment passes before Raph's eyes are rolling into the back of her skull, back arching, screaming as cum spurts from the tip of their cock, covering Donnie's hand and lower plastron in seed. Donatello groans at the sight, their long ignored cock throbbing in their shorts. But that can wait, right now they need to bring Raph down from her high and clean her up.
Donnie presses a sweet, chaste kiss to their soft girl's lips, churring happily, their tail wagging as Raph responds with her own hoarse chirp.
"Good girl, Raphie... You did so well for me, baby girl... Now let's get you ready for some rest... I'll even ask Mikey to make those cookies you like. You've earned them, sweetheart~"
Raph's only response is a tired, fucked out churr, and Donnie smiles, pressing one last soft kiss to Raph's cheek before slowly easing the dildo out of her. Donnie almost cums in their pants at just how much Raph is gaping. They snap a quick photo of their mate's messy slit, before tucking their phone away once more and setting about cleaning Raph up.
Their sweet girl deserves the best, deserves everything. And Donnie intends to give it to her.