"I don't know," Stiles ground out, his teeth clenched together. But he gives Derek another look. "Yet."

He folds his arms as well, looking at Derek again. "Look, I'm gonna make this clear. I don't want you around Scott or Lydia. You leave us alone, we leave you alone. Okay?"

Stiles knows that Derek isn't a bad guy, objectively. But he also remembers what Derek did to Jackson, and he doesn't want to deal with it. He wants to keep these problems away from his friends.