It's wrong to cheat on your girlfriend.
Bill and Jessica are in a loving, but sexually boring relationship.
Bill wants to try BDSM.
Bill asks Jessica if they can try some mild BDSM to see if they both enjoy it.
Bill starts going to BDSM orgies without telling Jessica.
Jessica ends up having an enjoyable experience, learning something new about herself in the process.
Jessica eventually discovers Bill’s activities which puts a strain on their relationship.