ENORMOUS dilemma: kids walks in on....help?

In the same neighborhood I live in, one of the guys I know has a younger brother (10 years old). Me and this kid (let's call him Johnny) know each other. I know the entire family, actually, and very well. Johnny had a sleepover at his house one weekend (about a couple of weeks ago). The invitees were mostly from the same neighborhood and his cousin. For the sleep over (6 kids total, including John), 4 kids slept in one room and the other two in a smaller room nearby because the room doesn't fit them all. They've had this kind of sleepover for a long time now, it's sort of a custom. They have fun and stuff. Here's the problem: almost halfway between the two rooms there's a restroom. When they all had their fun that night and slept, my friend's little brother (Johnny) was unable to sleep (presumably too much caffeine) for quite some time. He woke up to use the restroom and he heard some noises from the other room, something that made him happy since there's someone else awake.(see below)