A father-in-law who is suffering from impotence sees his wife's body and gets fully erect for the first time in six years, saying, ``This may be the last time I get erect, so please let me penetrate you just once...'' Having no choice but to allow their pussies to join, they can't forget the taste of the incestuous penis, and steal from their husband's eyes and spend all their time in raw sex.

The reason why my mother-in-law, who was living with me, left home was because of my father-in-law's impotence... The two try to console the grieving father-in-law and try exercises to promote erections, but it doesn't work and the father-in-law becomes desperate. Unable to watch anymore, Serina tries a groin massage, and no matter what she does, her father-in-law's cock, which would not get erect, quickly grows and becomes fully erect for the first time in six years! In response to her father-in-law's desperate plea for penetration, saying, ``This may be the last erection of my life...let me remember the pleasure of being a man just once for the last time!'', Rina secretly allows sex without telling her husband...