A lot of things hurt that Derek had just said but the one thing that stuck with Stiles, that hurt the most was being called a mistake. He wasn't even wanted and it had just been made clear. He was a screw up in the camps, driving his dad to drink, and he was a complete mistake here.
"Why are you even here still?" Stiles asked his voice hard, his eyes hard, and his body completely tense. His jaw was clenched as he moved to get up from the bed, refusing to stay on his back when Derek was around. The werewolf had made him feel like a big enough loser as it was.
Using an arm Stiles pushed himself up onto his feet from the bed, winced slightly at his hip throbbed, before he glared at Derek. "Don't you have something else to do besides torment the mistake?"