The mother-in-law's frustration is discovered by her son-in-law, the mother-in-law is seen masturbating by her son-in-law, and the mother-in-law is seen committing adultery by her son-in-law. For various reasons, the son-in-law demands her body, and she cannot refuse, as he does as he pleases, climaxing over and over again. "I'm not fit to be a mother," she murmurs, as she climaxes again and again from her daughter's husband's enormous cock, but she succumbs to the impossible pleasure. She begins to desire it herself. Episode 4 of an immoral erotic drama.