"That's not true," Derek protested. "I've believed you before." Granted, he was a werewolf and could hear when the boy was lying, but that was beside the point. "I want this to work, Stiles. I want us to work. But I won't keep fighting you. It's not...." he frowned, unsure of the right words to use. "It shouldn't be like this. I don't understand why you don't do what I say when there's no reason for you not to, unless it's to deliberately antagonize me."