JUL-031 Tsubaki Amano is invited by her mother-in-law who wants her son-in-law's big dick all the time.

Tsubaki started living with her daughter and her husband when her husband moved away from home. - One night, she witnesses her son-in-law, Takeshi, masturbating because his dick is too big for him. - Tsubaki, who was sexless, is captivated by the power of the towering big dick... - Tsubaki continues to seduce him day and night, telling him that her daughter's mismanagement is her fault. - Eventually, Takeshi can't stand it anymore, and even though he knows she's his stepmother, he obsess over her bewitching delinquency...