“I don’t know what you’re talking about,” Stiles grinned, unable to even attempt feigning innocence. “If anything it’s because you’re so sexy, you get me so wet, what am I supposed to do?” He smirked, groaning happily as Derek continued to press inside him, stroking in and out-
“Yes you want that? You want me to get the one that inflated so I can knot you, so I can keep us locked together and make you come over and over-“ Stiles’s voice was a little wrecked, breathing heavier as their bodies moved and his orgasm built up slowly. “- until I think you’ve had enough? Or until you beg to have me come inside you, fill you up like you’re a needy omega-“
No one else would ever get away with saying that to him, but if Derek wanted to then stiles was pretty sure it would do nothing but turn him on. He’ll, he was convinced Derek could hold him down and call him a knot slut or a desperate omega needing to be bred and Stiles would moan his agreement. But only because he knew how sweet Derek sounded when he was being fucked, too.
“Wanna knot you, wanna-“ Stiles broke off with another moan. “Can feel you growing, Der- feel your knot getting bigger- so good, you’re so good-“ he let out a little cry when Derek could no longer pull out, feeling the tug at his rim that made his cock jump. Softer cries fell from his lips with every roll of Derek’s hips, getting louder as his own orgasm began to crest.
Derek’s lips against his neck sent a sharp spike of pleasure through him, and moments after he felt Derek stiffen behind him, Stiles’ own orgasm rushed through him, his cock spurting gently over the sofa. He sobbed, trying not to collapse under his wobbly limbs and Derek’s weight.
“Oh God, Oh my God. God, Derek-“ He panted, enjoying the gentle throb of Derek’s knot, enjoying that they were tied together once again.
They really hadn’t even meant to have sex out here. Stiles had thought they were more than done for the night, but this had been amazing sex. So even if they wanted to control themselves it seemed impossible.
He let out a little laugh, gently lowering himself down to lay on his belly, drawing Derek down with him.