After her husband's death, Kyoko lived alone in the countryside, but concerned about her son and his wife, she suggested moving in with them. Kyoko relocated to the city and began living with her son and daughter-in-law. Both her son and his wife treated her with great kindness, and Kyoko enjoyed a peaceful daily life. However, watching the couple together stirred memories of her late husband, leaving her feeling lonely. Recalling the happy days she once shared with her husband, she began masturbating to fill the emptiness. One day, her son caught her in the act and suddenly attacked her. Shocked, Kyoko found herself drawn into a sexual relationship with her son. At first, she resisted, but gradually she opened her heart to the pleasure he gave her. One day, Kyoko realized her period had stopped. After checking, she confirmed that she was no longer menstruating. She told her son, "I'm no longer a woman since my period has ended," and expressed her desire to end their relationship. But her son took joy in her words and told her he would now creampie her. Until then, Kyoko had allowed their affair but had forbidden creampie. Torn by conflicting emotions, Kyoko opened her body to her son. The son finally released his semen deep inside his mother's long-desired womb. Kyoko reached orgasm during their act, but the creampie brought her an even deeper sense of satisfaction and happiness. In that moment, Kyoko was pulled once again into the quagmire of incest.