The pressure in her bladder is intense, a challenge she can't ignore. She's been holding it in for hours, her belly now a bulging balloon of need. She's dressed to impress, her pumps clicking on the floor, but now they're just a hindrance. She needs to let go, and she needs to do it now. She hikes up her skirt, her fingers finding their way to her slippery folds. As she masturbates, the pressure builds, her pussy clenching around nothing, hungry for something to fill it. And then, with a moan, she releases, her piss gushing out, drenching her shoes and making a mess on the floor. It's a messy, satisfying relief.