Misako and Etsumiko are sisters who have been turned into sex sluts by Kazuhiko. Misako is torn between her husband, Yosuke, and her son-in-law, Kazuhiko, but when she sees Etsumiko moaning under Kazuhiko's caresses, she feels a fierce jealousy in her female instincts. As if to taunt Misako, Etsumiko takes Kazuhiko away and devours him. And Misako... The final chapter of the popular "Iroko-mother" series!