A widowed mother becomes obsessed with masturbating while secretly watching her son and daughter-in-law having intense sex. Lost in the pleasure, she can't stop herself. One day, her daughter-in-law catches her touching herself. Feeling sympathy, the daughter-in-law thinks, "Poor mother-in-law..." and decides to arrange for her own father to be with the widowed mother. The two seniors reignite their passion through sex after a long time, gradually forming a new relationship together!