JAV Tokyo

Yumiko is still good friends with her husband. She and her husband still get along well. Recently, however, her husband has been having sex less and less often, and she feels frustrated. To relieve her frustration, Yumiko starts exercising on a balance ball that her son gave her. A week later, Yumiko gets a cramp in her leg while exercising. Her son rushes in and stretches it out to heal her leg. The son becomes horny while touching Yumiko's sweaty body. Yumiko begins to feel strange when her son touches her. The two pretend to be calm, but they start to become aware of each other...