This trans sissy's panties become a makeshift toilet, their bladder emptying into the flimsy material. The warmth and wetness ignite their desire, and they can't help but reach down, feeling the dampness against their skin. They pull out their cock, hard and ready, and begin to jerk off. The wet panties, now filled with their piss, add a new sensation to their masturbation. They grunt, their body tensing as they cum, their load joining the fluids already in their underwear.