She is confusing, not at all what he has been told. He knows that it can be a trick, a trap, but if she is lying to him she is the best liar that he has ever met. It doesn’t show in her movements, it is not in her eyes. Still, she has his wand and even if the vines are crumbling around him, he will not make a move against her. Even with what she is doing is stupid and risky.