"I know you're a human being," Derek answered. And he hoped Stiles knew that if he was anyone else Stiles would have been backhanded yet again. Stiles' cheek was already bruised, he didn't want to make it worse. But he knew that if this conversation went farther then he'd probably have to get forceful to get Stiles to watch his tongue. "And I know more than most Masters what it's like for you."

Maybe Derek would explain it one day but he didn't think now would be the best time.