Mistress Nica does not trust her husband and she wanted him to wear a chastity device. She felt that he had the chance to cheat on her and she did not want that to happen. So the next best thing was to make him wear a chastity device which he had no choice but to wear. She then tested him by teasing him and as he got a hard-on, the chastity device hurt him. That way, he would only have sex with her as she had the key to the device.