Auri had never had to piss so badly in her entire life. She thought she could hold it until she got back from the store (Mistress hated it so when she was late!) but a long line and a full parking lot had turned a ten minute process into almost an hour. She clenched her bladder muscles for all they were worth, but time was running out. She finally got home, and neglecting to take the groceries out of the car, she dashed into her Mistress' house as fast as she could to empty her straining bladder.