He smells like a werewolf, and he doesn't - she has the Gift, she should be able to tell easily, and she can't and that sets her on edge. At least she has encountered Black Spiral Dancers before and can tell that that isn't it.

Then he speaks, and - right, that was an option. I didn't realize there were more. She mirrors the movements of the other werewolf, still trying and failing to get more of an idea of what's up with him. I didn't mean to trespass on anyone's territory. That doesn't seem to be what this is about, but there are a couple of things where it's definitely better to be safe than sorry.