She'll lead the way, but she'll also not just buy this. "You look like you're sick and probably running a fever. Even if you can normally run and climb, you might not be able to do so right now." She knows this from bitter experience. Being sick totally sucks, there's no beating around the bush there, but it also can't really be ignored safely. Because you will fall out of the window when normally you could pull yourself up onto the roof, no problem.