Wetting In Class

I come into class a little bit late and really need to pee, but the teacher says no. I sit and squirm while talking to my friends. Eventually, the teacher begins to wet her pants. I can't hold it anymore and her wetting makes it worse. I begin to dribble pee out into my panties so I beg to be excused. The teacher agrees but asks me to get the janitor. I rush to the bathroom where I sit down and let out the rest of my pee.