KSBJ-429 On the seventh day after her husband's death, the mother-in-law, Kato Tsubaki, is sexually assaulted by her stepson and his friend, and becomes submissive in front of the portrait of her deceased husband. - Tsubaki Kato (Kaoru Natsuki)

Tsubaki, a refined widow, is observing the seventh day since her husband's death. Suddenly, her stepson returns home and pushes her down, saying, "I saw you not as a mother, but as a woman!" Overwhelmed by the long-awaited pleasure, the stepmother's carnal desires blossom, and she is caught masturbating before being forced into a blowjob, writhing in ecstasy. Then, her son calls a friend and says, "Let's show this to your father in heaven," leading to a wild threesome in front of his portrait, where they unleash their true natures!