Chapter Text
Stiles moans as he’s hauled up to his knees, sinking lower on Peter’s cock buried deep in his ass. The stretch is easy at this point; he’s already taken Derek’s father, Joseph, his brother and two cousins, as well as a strap-on from Talia while Cora rode his face. The only reason he hadn’t been fucked by Laura is she still has a few weeks before NYU gets out for the summer.
He hadn’t really realized what Derek meant when he said being mated to him would be like being mated to the whole family. He’d known most of them live together, but he hadn’t realized that the night after he’d received the mating bite, he’d be taken by the whole Hale family.
Derek had fucked him first, opening him up torturously slowly, wanting him as stretched as possible, leaving a load of come inside him. He’d been surrounded by Hales, getting fucked by each of them, sometimes more than once, until he’s a trembling mess, his hole puffy and loose.
“Derek picked well with you,” Peter hisses in his ear, fucking up into his ass, cum seeping out around his thick cock. “It’s like you were made for this. We could keep you like this, fucked out and full of our come and you’d be grateful, wouldn’t you?”
Stiles whines as Peter presses against his belly, rounded from the sheer volume of come they’ve left in him, then Derek is on his knees in front of him, tip of his hard cock pressing against his hole, where Peter’s already stretching him wide.
Derek doesn’t ask him if he’s sure or if he can take it, he knows the answer to both. He leans in, kissing him roughly, and slowly presses forward, cock moving against his uncle’s. Stiles whimpers as the tip gets past his rim with a pop, Peter hissing and tightening his hands on his hips at the press of Derek’s cock against his.
Stiles mewls, head falling forward to rest on Derek’s chest as he presses in farther, cock gliding in against Peter’s. He feels so full, so stretched open and god, he can’t wait to see how slack and puffy and messy his hole is when they’re done.
“Don’t worry, sweetheart,” Derek says when he bottoms out, Stiles stretched obscenely wide around them. “We’ll never let you be empty again.”
Peter pulls back then thrusts back into him, making Stiles shriek, his hard cock jerking between them. Derek grins, setting his teeth against the bite mark on Stiles’ throat, and fucking into him, finding a rhythm that matches Peter’s, groaning at the drag of his cock over his.
Stiles is trembling between them, his poor prostate almost bruised at this point from all the abuse it’s taken, his leaking cock rubbing between him and Derek on each thrust. It’s too much, too overwhelming from all he’s taken. It’s a few more thrusts in his squelching hole before Stiles is coming across his and Derek’s stomachs, whimpering as he shakes apart between them.
They don’t stop, don’t give him any relief, just keep fucking his pliant, oversensitive body until they’re coming inside him, adding to mess coating his insides. Peter pulls out first, fingers playing with his slack rim before backing away, letting Derek withdraw and lie down with Stiles. He’s exhausted, weak-limbed and tired, and lets Derek arrange him how he wants, two fingers playing with his puffy, aching rim.
“We’ll be sure to do this again,” Derek promises, feeding some of the come that’s seeped out back into Stiles’ gaping hole. “You’re part of the family now.”