Mitsuko's daughter had gotten married and moved out, but since both she and her husband worked, they found household chores to be overwhelming. Therefore, Mitsuko decided to live with her daughter and son-in-law. Mitsuko had been single for a long time and couldn't stop self-pleasuring due to pent-up desires. One night, when Mitsuko went to the living room, she saw her son-in-law, who was supposed to be sleeping upstairs with her daughter, masturbating. Seeing this made both of them feel awkward. Upon hearing the story, it turned out that her daughter and son-in-law hadn't had intimate moments in a while. Mitsuko couldn't help but stare at her son-in-law's large erection and offered to help him…
