He walks in on Fleur

Ron stays in his room, anxious for night and then morning to come, and the guests to leave. He plans to simply stay cooped in his room for the rest of the evening, but he soon realizes that this would be impossible - he has to go to the bathroom.

He opens his door with a low creak and tiptoes to the bathroom, intent on avoiding any female notice. He cautiously opens the door and quietly eases it shut, carefully latching the lock. Letting out a faint sigh of relief, he turns to the toilet only to see Fleur sitting on the seat, legs bare, calmly observing him.

Ron yelps and clasps a hand over his mouth, stumbling backwards into the locked bathroom door. Fleur cocks her silvery-haired head to the side, “Mon dieu! Ahr you ahlright, Ronald?”

“Fleur I-I-I’m so sorry, I didn’t know you were in here!” Ron blushes furiously, especially as blood rushes into his quickly erecting penis as well.

Fleur laughs casually, and Ron hears the subtle dropping of water and suddenly realizes that she is peeing, seemingly without caring that Ron is watching her. “Oh Ronald, zer is no need for distress, I’m nearly finished, you can use le toilette as well!”