Lady Scarlet was tired of this guy mistreating her and she had to punish him for it. She could not believe the kind of nonsense he did and that is why she had to stand up for herself. She chose to pee on him so that he would get scared of her and he would change for the better. She did not want him mistreating anyone else so she forced him to change.
Lady Scarlet's friend had difficulties dealing with her slave as she did not know how to punish him. She had to get him punished and that is why she reached out to lady Scarlet to help her do it. She agreed and for the issues which needed remedying, she recommended pee fetish and that is what they used to punish him. He was degraded but he learned a valuable lesson and changed.
Lady Scarlet wanted to settle a score with this loser and she knew that today was the day. So she went ahead and she turned the loser into a toilet slave. He had to drink her pee and do all the nasty shit she wanted him to do. And none of it was optional for him. It was a must for him to do what she wanted and she made sure of it.
Lady Scarlet loves to establish dominance over guys she allows into her life. This guy was one of them and he was into her charm and her beauty. But then she used her charm and beauty to turn him into her slave. She dominated him with her pee and got him to be her guineapig whenever she wanted to try something or when she was bored and wanted to have some fun.