He’d dumped her when her little sister turned 18, but she begged him to let her still have access to his cock. He agreed, but told her she’d be his personal piss slave. She’d only get to suck his cock after drinking his piss. It was hard to swallow at first and she had to take the piss in over a trash can, but after a few weeks, she gulped down his piss as fast as his cock spat it out. He told her she had become a great little piss slave and that she’d be drinking her little sister’s piss from then on as well. She thanked him by kissing his balls while he fucked her little sister in the ass.