Haha to musume: Mejiri kosuriai (1995)

Sonomi has had some worries recently. Her only daughter Yui is dating a man named Nobuyuki, who is after her fortune. When she consults her lesbian partner Hikaru, she is also after his money. Sonomi asks Hikaru to seduce her daughter, saying that once she gets to know women, she won't care about men anymore. When they are introduced, Yui berates her mother for her promiscuity, but her words fall flat on Sonomi. Angered by the sabotage, Nobuyuki forces himself on Sonomi.