The Fallen Wife: Forbidden Mother‑Daughter Desires (2000)

Yoshino, content with her life as a wife and mother, finds her carefully constructed world shaken when her daughter introduces her to Haruo, a handsome young man. Yoshino is unexpectedly drawn to him, seeing echoes of her husband's youthfulness in his charm. A chance encounter in the house leads to a moment of intense intimacy. As they are about to kiss, a sudden sound interrupts them, threatening to reveal their forbidden desires.