This role-play is performed by adults. Is it some kind of cause or effect or is it just luck? A son who decided to watch his favorite porn with his mother. My son gets an erection whether he likes it or not. My mother can't calm down while watching this and the porn screen. Motherhood trumps reason, and a mother crosses the line, telling herself, ``You want to have sex right now, right?'' It's for the sake of her son. "My mother is now a woman."