The Weasley Twins and the Chamber of Secrets
Fred: George, it’s two in the morning
George: Yes, but I was just looking at the map
Fred: Is Ron sleeping with that Peter again?
George: Naturally, but I also noticed that Ginny has been visiting the girls bathroom quite frequently as well as that corridor where Mrs Norris was mysteriously petrified and that threatening message written in blood in her exact handwriting was found on the wall
*shrugs and goes back to sleep*