Reiko watched over her daughter and son-in-law as they dedicated themselves to trying for a baby. She was worried when she heard they were abstaining for a month to increase their chances of pregnancy. In front of her eyes stood a bulging erection, pent-up and swollen from the month-long abstinence. Reiko couldn’t hide her surprise and excitement. (It’s grown so big… What will happen to me if it goes inside?) Despite her desperate attempts to quell her uncontrollable excitement through masturbation, she could no longer resist and pounced on her son-in-law’s erect penis.