maybe I'm misunderstanding, but doesn't she recognize him when he faces her without the mask?
She suddenly goes from chatting him up to full-blown panic departure on seeing his face, and I don't think that would happen just because she thinks he's hot or something. More so I'd reckon she gets shocked on it being him after she thought he was hot, as well as not wanting him to see her without makeup due to their "relationship" in that regard
but I could be wrong