Since her landlord had a thing for her, this mistress knew that the best thing to do to him was to humiliate him which she did by teasing him, making him pay for her rent and then making him wear a dick lock. He had no choice but to wear the chastity device and he was shocked that it did not help with sex. He complied with all she wanted though.
This married man likes to hit on people and mistress Gaia felt uncomfortable. She did not like what he was doing to his wife and she had to make him change his bad habits. He wanted to sleep with her so she pretended to agree and got him to wear a chastity device then dominated him with a vibrator. She had him feel pain and humiliation then warned him against cheating on his wife and trying to hit on other girls.
When this guy angered mistress Gaia, she knew that she needed to cruelly get back at him. And her choice was chastity femdom. That is why the mistress opted to use her chastity femdom to deal with him. He was forced to wear a cock cage and he had no control over his own dick for a few days as the mistress punished him. He never pissed her off again.