Madame Svea had beef with her man and she could not let it slide. She had to win the argument and she had to make sure he never took her down that road again. So she used chastity humiliation to do it. The mistress forced her boyfriend to wear a chastity device after which she teased him and let the device do the punishment for him as his dick expanded.
Madame Svea did not like how tiny this guy's dick was. He wanted to fuck her and since she was horny and he was a smooth operator, she was convinced. But when she saw his dick, she knew she could not fuck him as she could not get satisfied. Instead of fucking him, she humiliated him by making fun of his small dick as well as crushing it with her feet.