A couple who had been together for a long time. Chisato hadn't had sex with her husband in a while. However, her husband's sexual prowess had been waning year by year, and she couldn't find satisfaction. She had resigned herself to this as an inevitable part of aging. One morning, Chisato went to wake up her son, who was sleeping in. Her eyes were glued to his morning erection. 'Getting aroused by my own son,' she chastised herself, but her body ached. Another day, when Chisato went to wake her son, she became excited at the sight of his erect penis and couldn't help but start stroking it...
