Bart is looking at some sexy pictures of his mother and complains that his father always has her every night but only complains about his job. That night Bart spies on them and seeing that Homer goes to bed tired without pleasing his mother goes to bed and fantasizes about her, but he wakes up feeling that the dream is more real than it seems, and in that he realizes that Marge is sucking his cock and when he realizes it does not take long and squirts inside his mother’s mouth.

She incredulously asks her mother what she was doing but realizes that she is asleep and sleepwalking, after that she leaves and falls asleep on the couch. The next day Bart still doesn’t believe what happened last night and when he sees his mother he can’t stop thinking about her, when Homer arrives and tells them that he has to go to Paris for work, Marge tries to ask him for an explanation but Homer leaves.
Bart calls Lisa to ask her how sleepwalking works and she explains to him while she and Maggie are in an orgy in Denver. When they finish talking Bart goes to comfort his mother to calm her down.

Later that night Bart is awakened by loud music, when he goes down to the living room he sees his sleepwalking mother exercising and he decides to take advantage of that moment, and starts touching her ass, spanking and stimulating her while he runs his huge cock across her buttocks.

Bart doesn’t hold back and starts sucking his mother’s pussy, he stimulates her vagina and asshole making her feel so much pleasure until she has a squirt and finishes. But Bart doesn’t stop there, now he takes her and penetrates her deep in the vagina until he reaches the deepest part of his mother, with each thrust he gets a deep moan from his mother who, sleepwalking, can’t hide all the pleasure she is feeling at that moment.

Bart takes his mother and changes positions, penetrating her harder and harder, deeper and deeper to satisfy the desire he has had for years until he finally can’t hold back and cums deep inside his mother’s vagina.

At that moment the phone rings and Marge wakes up, Bart hides and his mother does not discover him, she realizes that she is naked in the living room and confused looks for an explanation while Bart runs to his room.

Meanwhile in Denver a biker wants to overtake Maggie, but she and Lisa can’t do much against that man until someone arrives and saves them.