[Big-breasted mother and daughter's beastly slut battle! They fight over the adopted son's insatiable cock until their sexual desires run dry] Sayaka, the daughter, married a husband who is usually kind but has a very intense sexual relationship. By chance, Yumi, the mother, peeked on them. Seeing his cock, her pent-up sexual desire explodes and she awakens to her lust. She seduces her adopted son in lewd underwear and eats his insatiable cock, and not to be outdone, the daughter also wears erotic costumes and gives him a full course of tit-fucks. In the end, she pincers the adopted son and the lustful intercourse escalates!