Des：Emi used to live with her son and wife and grandchildren, but now she lives alone. Sometimes her son or grandson comes home, but she usually lives alone and lonely. What she enjoys is watching TV and masturbating as a daily routine. Part of the fun is thinking about what to masturbate with today. One day, while she was masturbating using a vibrator, her son Hiroshi came home. Hiroshi witnesses his mother masturbating and becomes erect. Just like that, the two of them...