A mother and her 14-15 year old son are engaged in a sexual affair behind the father's back.. not exactly a love affair, a mother-with-benefits affair and somehow, all his classmates at school have come to know about it. They treat him like a hero and the mom, like...a mascot? maybe they crack sexual jokes at her expense or smirk or openly talk about it with her, and she just laugh and play along. She's cool, they're cool.. but she is still Mrs X... One day, the school organizes a trip for the class and who do they appoint as the chaperone? The mom of course. The fun starts as the bus leaves the school grounds.