Madam Amour wanted to dominate this guy, and she did it with her strapon. She did not want him to think that they were equals. She had to show him how dominant she was, and that is why she used her strapon fetish to do so. The mistress not only used the strapon on his ass, but she also used it in his mouth to deepthroat him and choke him.
Mistress Kitty thought that this guy would be careful but he ended up being careless with her stuff and he lost it. She was pissed and she did not want to let him get away with such carelessness. So she used her strapon to ass fuck him and by the time she was done with him, he had felt the kind of pain he had only read about but never experienced.