The son, who has found his stepmother's weakness, offers her cunnilingus as a condition for exchange. Unable to refuse, he opens her legs and licks her pussy hungrily. He then asks her to "sit on my face" and sits on her face! Her tongue sucks her crotch desperately, and her hips start moving on their own, making her cum with shame! Unable to resist, the stepmother takes the dick in her mouth and inserts it herself... leading to forbidden incest!