He fucks his own mother while the father sleeps in the same bed

This guy has a problem of masturbation addiction and the doctor has told him that he has to cut him fucking with women. So what he does is go in the middle of the night to go to his parents' room and start to put his hand on the mother until he cheers up and sticks his cock in her pussy. The mother is scared, but in the end she lets him fuck her even knowing that her husband, the father, is sleeping next door. The son fucks his own mother and enjoys every second in which he has his cock in his pussy.