Lady Despina wanted to dominate this guy and she did it primarily because he was inconsistent. She did not want that to continue and that is why she used her femdom fetish to deal with him. She had him lick dirty feet and when he was done, he had to suck her toes until she was satisfied that he had done it. The mistress even recorded what she did to him.
Lady Despina wanted this loser to know that she did not tolerate anyone messing up. When he did, he had to be punished and she did this with her ass. He was facesat on and forced to endure the pain and humiliation of it all as she made sure that her hot ass was stinky and smelly. The poor guy had no choice but to do what she ordered him to do.
Lady Despina was desperate to control her boyfriend because she did not want to lose him to other bitches. So she used every means at her disposal to control him so that she could have him to herself. That is how today she chose to try chastity femdom. She had him wear a device and when he had, she hid the chastity key knowing she controlled his sexuality and so he would not cheat on her.