Shoko has been having an affair with her own son for about six months. The thrill of being found out by her husband makes her more excited than usual, and she can't stop. However, recently he has become even bolder, and even though her husband is there, her son continues to knead Shoko's buttocks and begs for more. Shoko is unable to strongly resist, and accepts her son's erect penis, letting pleasure take over. Mother and son are making love again today, in a tense situation where their family would fall apart if they were found out...