The babysitter is on the couch as the father comes home. After their last adventure both have no hesitations, and start kissing right away. Both get nude, and at the same moment the wife comes home after being at a BDSM party with her slave. She is shocked, and she gets very angry, but soon sees an opportunity to satisfy her desires to humiliate her cuckold slave.
So she tell them to go on with what they was doing, and rather stimulate to a good fucking scene. When her husband is about to cum, she calls the slave over, and he must take his load in the mouth.