It's been three years since Nanami began to treat her son sexually. She felt a sense of danger when her son shut himself up in his room and continued to masturbate, so he helped her act. She naturally knew that it was wrong for her, but she convinced herself that it was a temporary measure until her son could reintegrate into society. Her husband seems to be skeptical of their relationship, though he doesn't get to the heart of her. She tells herself that she must cut off this relationship as soon as possible, but her son does not listen to Nanami's persuasion and just asks for a body. That's how the sloppy relationship continued...
