Yuri, a stepmother in her prime, is repeatedly made to orgasm by her husband's stepson's virile sexual intercourse, and her body and sexual desire are out of control. When her stepson demands her body for an unreasonable reason, Yuri refuses, but eventually accepts. She receives unimaginable pleasure from the intense hip movements of his enormous penis. An incestuous erotic drama between a stepmother in her prime and her stepson with a huge penis and extraordinary stamina.