As a storm rages outside, Marge Simpson's insatiable hunger for taboo pleasure leads her to her grandfather's bedroom. She finds him watching TV, and without a word, she mounts him in reverse cowgirl, her massive tits bouncing as she rides his throbbing cock. Grandpa grips her wide hips, thrusting deeply into her married pussy. Marge greedily sucks his dick and licks her juices from his shaft before taking him in her ass, moaning as he pounds her tight hole.