Real-life version: Mom is a woman too! 1 & 2 A sexually driven biological mother x son: Forbidden sweet incestuous relationship. Rei Kimura URE-136

Forbidden Sweetness: Mother-Son Incest! Rei Kimura's First Live-Action Work! Natsumi, a housewife, continues her sexless marriage, but as she gets older, she tries to convince herself otherwise. However… one day, her only son, Takuya, a test-taker, begs her, "Actually, I see Mom as a woman, and I can't concentrate on my exams! So please have sex with me!" Natsumi naturally refuses, but Takuya's persistent requests and her own surging lust force her to cross the line…