Lady Zoey had messed up and she knew this guy was pissed at him. She did not want to take chances with his forgiveness so she used her hypnosis fetish on him and she had him and she got him to forgive her. The mistress, being an expert at it, was able to control him and to make him forgive what she had done and even tell her it was nothing.
Lady Zoey knew she had hypnotic powers and she used them for her own fun. There was nothing she wanted from this guy. So she hypnotized him for the sake of it. The mistress had a great time doing her thing and she got the guy under her spell and ordered him around for her own amusement and he was like a robot and he carried out all her commands.