Madame Marissa was asked by her friend to help her deal with a cheating boyfriend. She asked her friend to dump the cheater but she did not want to. So she asked her to use a chastity key to control him and she was interested. So she gave him a chastity device which she had to put on him after which she would hide the chastity key until she decided it could come off most of the time being when they were together.