I Can't Tell My Husband, Even If I Could, That I Was Impregnated By My Father-in-law.... I Was Impregnated By My Father-in-law.... - Kokoro Ayase

Kokoro's daughter-in-law is under pressure to have a grandchild. One day, her mother-in-law suggests a family hot spring trip. However, to make a baby, the mother-in-law orders them to abstain for the month leading up to the trip. On the day of the trip, Kokoro's husband refuses to have sex with her. Meanwhile, her father-in-law also tries to sleep with his wife but is rejected. The two, pent up with sexual desire, head to the hot spring to calm their restless bodies. And then, her father-in-law accidentally catches a glimpse of Kokoro bathing...