It's subtle, but he can sense that, while she was trying to determine the cause of the evil within the forest... that same evil has reached out, and taken root in her. Not much, yet, but enough, corrupting her along with the rest of the forest.<br/><br/>It'll be some time before anything other than a dark mood is the result of it, as long as they get out of the forest relatively soon. He could, of course, dispel the curse, as well as the curse over the entire forest, if he so chose... but such displays of power would likely not go unnoticed. Maybe she'd notice him cleansing her, maybe not.