She shrugged when he asked her what changed her mind. "You didn't look like you were going to leave," she said, as if it were the most nonchalant thing in the world. "I'd much rather you wait at the convenience store down the street, but it would be rude to leave you out on the doorstep in the middle of February. People might ask questions if you died of hypothermia."
She gestured to the professor's sitting room. "You can sit there if you want," she said. "The Professor should be back in a couple of hours. Do you want some tea?"