The son-in-law helps his mother-in-law get pregnant; the mother-in-law, experiencing a resurgence of youth, has a very high sexual desire and seems to want to get pregnant again, but the father-in-law can no longer satisfy her. Seeing his mother-in-law unhappy, the son-in-law volunteered to help her get pregnant. Initially, he only intended to have a secret affair with her once or twice, but because his mother-in-law was so desirable, he found himself unable to stop having secret encounters with her.