While watering the garden, Sayuri, a mother, is suddenly hit by a strong urge to urinate. She rushes to the toilet, but her son is using it. She has no choice but to defecate in the garden, but she can't control herself from the happiness and embarrassment of being freed from the urge to urinate, and starts masturbating right there! The next day, her son, who had been watching her, forces Sayuri to urinate outdoors, saying, "Piss outside again like yesterday!"...