Ryoko and her husband, who hadn't been intimate in a while, finally got together after seeing her voluptuous ass. However, her husband, exhausted, fell asleep on his own. While she thought it was fine as long as he was satisfied, it was hard to end things without climaxing. To relieve her frustration, Ryoko started doing yoga and using a balance ball. One day, while exercising, Ryoko twisted her ankle. Her son helped her stretch it out and gave her a massage. Unable to help herself, Ryoko's pussy got wet, so she tried to masturbate in secret, but her son caught her in the act...