Re: 15th
Derek let out a noise as Stiles slipped sideways, the razor just barely nicking his skin - but it was sensitive skin, no doubt smarting as Stiles started to thrash, his anger spiking once more. It wasn't a surprise, really - Derek had been shocked to get so much personal information from Stiles in the first place. He dropped the razor into his bowl of water and stood, immediately moving to catch Stiles.
This time he was ready for the attempted punches, stepping behind Stiles and bear hugging him, trapping his arms against his body. "Stop. You might've had enough, but you're not done." His voice was firm but not angry; it's not like Stiles could escape the room. Dragging Stiles across the floor, Derek had him up against a wall; Derek was getting better at confining Stiles without a single cuff or manacle. "Stop. Stop throwing away the good I'm offering you. You may hate everything about this situation, but that doesn't mean you're not allowed to feel good."
Thinking harder on something Stiles had said, Derek squeezed Stiles' torso again. "You think your dad wants you to suffer? Or if he knew you were owned, would he want you to have good things?" Derek knew there were far worse masters out there compared to him. Stiles had gotten off easy.