[She doesn't answer at first - it might look like she didn't even hear him, with the way she brings a hand to her temple, eyes flickering back and forth on the forest floor. But, eventually:]
Steve. I, I saw what he... [she was right there when he got frozen, and still she ran away from that. Stiles' speech about taking responsibility might not have been entirely misplaced, after all.
But as for the rest:] I thought it was just around the forest.