Lady Naomi is a hot girl and she loves to show off her hot body and to drive guys wild. But today she wanted to punish her boyfriend and she did it with her chastity key. The mistress got him to wear the device and then she teased him. His dick became hard and could not fit in the device and it hurt him. That was his punishment together with the fact that she hid the chastity key and let him wear the dick lock for days.
Lady Naomi wanted to torture this guy and she did it with her chastity key fetish. The mistress went ahead to force him to wear the chastity key and when he had done so, she had fun teasing him. He loved what he saw but as he got a hard-on, he realized his dick was caged and he could not move about freely or do anything with it and that was when his troubles started.
Lady Naomi caught her boyfriend flirting with other girls and she preferred the sort of punishment that would make sure he would never do it again. So she made him wear a chastity device and she hid the key. She let him get hurt as he got turned on seeing her almost naked. But she did not remove the device despite his repeated pleas to her to do it. He had to learn his lesson and he learned it well.