Mistress Barbie did not want to be associated with her ex but he did not want to let her go. He wanted to get her back and she did not want anything to do with him. So she had to teach him a lesson she wished he had been taught and that is why she used her pissing fetish to do it. He was made to drink her urine and do what she wanted. He never bothered her again.
Mistress Barbie was known for her high taste. She was known to love the finer things in life and that reputation came in handy when she wanted this loser she secretly despised to drink her urine. She pretended that she wanted him to drink some expensive wine but she mixed it with her urine and she gave it to him. He loved it and told her that he wanted more.