Lady Stefanie's husband had worked his off and his hard work had paid off. He was now in the rich zone and she knew women would circle him like vultures. So she had to protect him from them and that is why she made him wear a chastity device. The mistress ensured that the only to it was with her and that it was hidden. She also had him get scared of cheating on her.
Lady Stefanie had a husband who was always horny. She felt that that was not a good thing as it increased his chances of cheating. She did not want that so she made him wear a chastity device to ensure that however horny he was, he went home to get his satisfaction. He was shocked at what she did to him but he had no choice other than to cooperate with her.
Lady Stefanie wanted to get this guy to wear a chastity device and she did not care how he felt about it. The mistress used threats to make him do what she wanted and since he had no choice, he did what she asked. He did not feel anything as he wore it but she turned him on and that is when he was shocked at how painful it was when she had an erect penis.
Lady Stefanie used her seductive skills to get her slave to wear a chastity device. He thought it was something naughty she wanted to make him do but it turned out she was having fun at his expense and at the same time punishing him for something he had done a few days prior to that. The mistress got him to wear it, hid the keys and turned him on for it to hurt him. She let him stay with it for a few days.