Mom's 'sex education' class begins with a hands-on demonstration of the art of deepthroating. She takes her step-son's length down her throat, gagging slightly as she teaches him how to fuck her mouth. Next, she shows his girlfriend how to properly lick a pussy, her tongue flicking and swirling around the girl's clit until she's squirming with pleasure. Finally, the step-son gets a turn, Mom guiding his hips as he thrusts into his girlfriend, teaching him how to hit her G-spot, until they're both crying out in orgasm, completing their lesson in mutual satisfaction.