Most of the students were in bed or headed that way, which, Essery decided, was good enough. She left the prefects in charge and told them again what a good night she hoped they'd had, but then she was waiting outside the portrait - assuming he'd come to find her there. When she did see him coming down the hall, she was almost embarrassed to realize how fast her heart was beating, how flushed she felt.
It wasn't like he'd do anything more than have dinner, right?