It's not allowed for a father and son to have sex. She knows it in her head. But even so, Mio couldn't refuse her son Koji, who tried to comfort her in place of her husband. They had been sexless for a long time. Her body hadn't been touched sexually for a long time, and she was yearning for a hard penis. Mio's body was aroused by the persistent caresses and ferocious thrusts. Before she could even enjoy the afterglow, she pushed past the limits of orgasm, seeking further pleasure...