Madam Tulpan peed into a glass. She had this slave watch what she did and then she had him drink the pee. But before he drank it, she spat into the glass as he watched. She had a warning for him that he was not allowed to puke as he drank the pee mixed with saliva. He struggled to do it her way and it was hard but he did it.
Madam Tulpan needed to be paid back the money she had loaned this guy. He was not able to pay it and she did not want to make it a longstanding debt and she did not want to write it off. She wanted to consider it paid and she did so by peeing on the guy and using him to try her new pee fetish. He had no choice but to be her guinea pig.
Madam Tulpan had to find a way to deal with this loser. She felt that it was up to her to change him and as she interacted with him, she felt that piss femdom was the best punishment for him. So she made him watch as she pee into a glass and she gave it to him to drink. Besides that, she also peed directly into his mouth and he drank it.
This guy was used to dismissing other people and madam Tulpan did not like it. She felt that it was important for the guy to learn that he had to change and stop dismissing others all the time. And since he was not able to change by himself, she forced him to change when she made him drink her pee. The degradation and humiliation he felt forced him to change.