"Mm. Yeah, I did notice that."

She absolutely was going to stay and ask him questions. There was nothing about this even approaching what one normally does on an evening; she was beyond curious.

"Must be a hell of a book to get you to abandon a party and search a deserted street at this hour of the night. What's it about?"

Not to mention: peppering him with questions gave him less of an opportunity to do any questioning of his own.