Princess Serena felt that this guy was becoming too much. He had to be controlled, and there was no one else other than her who was to do it. That is why she cruelly turned him into a human horse, and she rode him all over. She also did all manner of things to him so that he knew what kind of person she was and what she could do to him.
Mistress Sophie did not like how inappropriate her cousin was being and she had to punish him for it. She had to cruelly teach him to do things the way she wanted them to be done and that is why she used her pony play femdom to dominate and to torture him the way she wanted. He cried and begged her for mercy but she did not care about him. He had to change and he did.
Mistress Abbie knows how to make anyone do anything she wants and today she had no one to dominate and humiliate so she thought of her ex. Since he wanted her back and had been talking to her and trying to win her back, she felt that he was a good candidate for humiliation. So she baited him and she turned him into a human pony and enjoyed having fun at his expense.