When Katie watches Alexander embarrass herself in a messy game show, Sara bets he she couldn't do better. The rules are set and four people walk into the room, but only two will come out with both their clothes and their dignity. When the chips have fallen, Sara starts pushing the boundaries with Alex and Ryan and ends making her own very messy choice.
Book 3 of the iSlime series explores the boundaries the girls and Ryan are willing to push together. As Katie says, they're young enough to misbehave, and old enough to know they are doing it.