Of course, those boys would have taken up the tower. It was going to be interesting but she'd make it work. But she wanted to distract him altogether with her question. Change the topic to something lighter.
"If he does show up, I'm going to strangle him with my bare fucking hands - and don't try to stop me," she told Harry, a smile on her face but seriousness in her voice, "He was in my year and he really should've been in Slytherin." Now she was starting up the stairs which was easier than going down. Less chance of slipping and falling to her death.