Lady Despina wanted to find out whether she could use chastity femdom on her man and whether it would be successful in being a foreplay sort of thing. So she teased him and got him to agree to have it on and then she teased him some more and enjoyed how he begged her to agree to remove it so that he could nail her because he was dying to.
When lady Despina found out that her man was cheating, she had to dominate him and she did so using her chastity humiliation fetish. She did not want to sit back and wait for him to do it again. So she had him wear a chastity device before she felt that it was enough punishment for him and that he would not repeat what he had done. She only left him space to pee.