After suffering from erectile dysfunction due to post-illness complications, the husband, unresponsive even to his wife Yumi's blowjob, had fallen into a sexless life. Unsatisfied with her husband's devoted sensual massages, Yumi eventually turns to her stepson! With a passionate kiss, she stimulates his erection and frenziedly performs a high-speed blowjob, swallowing every last drop. As they continue to indulge in pleasure through sex, the husband appears before them... Seeing his wife taken by his son, his impotent penis becomes excited and erect! He then joins in a incestuous 3P with his family, thrusting vigorously into Yumi, leading all of them to a peak of pleasure!