"Ahhh!" When her son's hand touched her nipple as he was massaging her shoulders, Yuko reflexively writhed and let out a seductive cry. The mother was a single parent. She had put the woman's happiness on the back burner and devoted herself to raising her child. But now that her son was about to become a man, Yuko realized that the instinct to desire a man within her was awakening. Seeing the woman in Yuko, her son approached her in an excited manner. Having awakened to the pleasures of her nipples, Yuko was unable to refuse...