Divorced twice, Yuko Matsui has an insatiable libido that drove her previous husbands away. Now remarried and living a peaceful life with her husband and two sons, her desires grow uncontrollably, transforming her into a lustful mother who shamelessly seduces her own children. The eldest son, caught masturbating, is overwhelmed by a titfuck and handjob that make him cum helplessly. The younger son is drawn into incestuous acts including tit-grinding, 69, and cowgirl-position sex with intense hip movements. Though the sons eventually flee when she demands their sperm, she turns to her husband, coercing him into creampie sex twice in a row. Yet, Yuko's abnormal lust is far from satisfied!