You can hold no longer

You try the door. "Please, I'm sorry," you cry. You hear her cackle. You turn to try the next door restroom. You mewl pitifully as your bladder bursts with your piss, anchoring you in place as your legs buckle. You feel the spray from the torrent splatter your high-heeled feet as you widen your stance to keep it off your legs.

"Piss your panties, little girl?" the woman crows as she passes you as you gingerly ease the soaked lace down your long legs. You wash your pussy with a wet paper towel at the sink, the undies now in the trash.