Re: 15th
It was impressive that Stiles fought as long as he did, and Derek also appreciated the fact that Stiles was exhausting himself; it would make Derek's life easier for the rest of the night. That didn't mean Derek was going to let go of him though. He held Stiles tight, as if he could fight back at any second, for another few minutes until he could feel Stiles' pulse slow down.
"You're right," Derek said in a low, even voice. "I don't know anything about your life before I bought you. But it seems pretty obvious to me that you shouldn't suffer when you don't have to."