Derek nearly hisses when Stiles' fingers wrap around him and he immediately presses into his fist. It's like he can feel every bump and callous on Stiles' fingers as they stroke him.

"Would you like that, Stiles? Would you want to fuck me? Have your cock buried in my ass?" he whispers before nibbling on Stiles' earlobe. "First I'm going to pound your ass into the mattress," he promises, his voice trembling slightly as his pleasure builds. "I'm going to make you mine, Stiles. Mine," he growls, biting Stiles none to gently on the shoulder, marking him despite all thoughts to the contrary. But right now, he doesn't care. Stiles is marked and writhing beneath him and it's suddenly all too much, too perfect.

"Stiles...fuck, tighter...just like that," he pleads, thrusting into Stiles' hand. There was a time Derek prided himself on his control, but today was not that day. He was going to lose it any second now, but he wanted to make sure Stiles came as well. His stroking tempo on Stiles' cock sped up to match his panting breaths. "Let me watch you," he pants, pulling his head back. "Let me see you come undone, Stiles."