It wasn't so much being kept on her toes, but she had no idea what it was, so it was best not to think on it overly much. She closes and locks the door behind him, resealing her wards into place. He could leave as he liked of course, but no others could enter.
It would not occur to her to ask him to put out the cigarette either, he may smoke if he likes, the scent reminds her of torches, it's familiar and she finds it soothing, strangely.
Silence lingers as she moves from foyer to living area, her hands folded neatly in front of her, entirely uncertain.