Okay, that is ... fair - but not fair at the same time. Stiles did not let him know. That's true. But, he can sense these things, literally smell them. And then he got kidnapped! And beaten up. He takes a few steps, closing the tape measure.

"I thought I was keeping you safe." And, how wrong had he been with that? And there back to Sheriff Stilinski. Or, Scott is, in his head. They do need to tell him. They have no choice, do they? But, they can't because they're here. Well, then.

Scott also knows what his mother means. She doesn't mean before. She means now. She means back home. She means even before the bite ever happened. It's what he does. Scott doesn't need help because he does the helping. He takes care of others. He saves others.

Or, he tries really hard.

"We should look at beds."