"Oh, you're on, sweetheart," Stiles smirked at the challenge. He was very good at finding things, and if Derek was true to his word (and if he wasn't a werewolf) he'd be very sore by Sunday evening.
But then again Stiles knew they had other plans for this weekend, so maybe Derek would get away with it.
Those thoughts were once again cut off sharply by Derek's tongue sliding over him, over the stretched rim of his hole, breath warm against the sensitive skin. "Oh fuck, oh God-" Stiles breathed. "You're really, really fucking good with your tongue," he groaned. Derek eating him out would never be a problem.
"Feels amazing. I feel to tight, so full," he whimpered, before crying out when Derek tapped the base and it rubbed up against his prostate. "Oh my God, oh God," Stiles whimpered. "Oh God it's so good. I can't wait until it's you-"
His eyes had been squeezed shut, his free hand tangled in the sheets, but at Derek's words Stiles snapped right to attention. "Yeah," he panted. "Oh yeah. Yeah I do. Yeah, I really, really wanna watch. You're so nice to look at, Der. You have the nicest body; your belly and your thighs and your dick-" It was Stiles' turn to ramble, his gaze running up and down his mate. "Show me, show me everything, show me where you want me, your tight body-" Every part of Derek really was so sexy. Even staring between Derek's legs, he was beautiful.
"Stretch yourself out and then get here," he said lazily, his hand wrapping around his cock, stroking slowly up and down. "Make sure you do it properly, I'm gonna plug you up after. But only if you tell me you want my knot. Only if you say, really nicely, 'Stiles, please give me your knot,'" he smirked, sitting up properly so that he could watch Derek. "Show me."