When his career-focused wife leaves on a business trip, her mother comes over to help him with the housework. He has always dreamed of getting his hands on his busty mother-in-law, so he spies on her in the bathroom and waits for an opening. She notices his stare, responds with an aggressive invitation, and they plunge straight into steamy bath sex. The mother-in-law who came to cook and do laundry begins tending to him in the tub as well, launching his fantasy life of sex and creampies with her.