Beware My Cheating Bart

"Beware My Cheating Bart" is the eighteenth episode of season 23. It originally aired on April 15, 2012.

Plot
Homer takes Bart and Milhouse to the cinema in the Springfield Mall, and decides that they should see the Happy Little Elves II: The Sequelf while he visits the Food Court. After Homer finishes eating, he buys a Butt-Whisperer 9000 from Sport Palais. After the movie, Bart and Milhouse pass by Dolph, Jimbo, Kearney and Shauna. Jimbo and the guys are going to see Crawlspace while Shauna watches All the Wrong Reasons. Jimbo forces Bart to chaperone Shauna. Homer begins to train with his new apparatus, but becomes infatuated with the TV series Stranded, as he begins to look through the trainer's built-in TV. The next day, Jimbo forces Bart to go out with Shauna again. They go to Crème de la Creams where Bart takes the blame for shoplifting a bottle of perfume that Shauna stole. Bart and Shauna escape from the security guard, and they hide in an abandoned store where Shauna shows her breasts to him as a reward for taking the blame.

Bart can't stop thinking about Shauna's breasts, Homer continues watching Stranded instead of training, Marge finds out about this, and does not approve. Bart and Shauna continue to see each other, after they kiss in Springfield Swimming Pool, the guys see them, and they are not happy, so they start chasing them. Bart and Shauna hide in the Android's Dungeon & Baseball Card Shop where Comic Book Guy kicks them out after Shauna angers him, so they decide to hide in Bart's treehouse instead. Homer has now created a club for Stranded fans, but it turns out bad, because he has not watched the entire series yet. The meeting ends with Marge telling Homer the whole plot for him. Lisa comes up to Bart's treehouse and offers to help them, but before she can help, the bullies find them. Lisa helps Shauna realize that she doesn't want either of them, and she reveals she wants an older man. Homer is angry at Marge for revealing the plot, but when he sees that she decorated the bedroom to look like a desert island, he is happy again. Meanwhile, Jimbo tries to scare Bart from taking his girlfriend again by letting him hang upside down from the tree house. The pictures zoom out from Springfield into space and ends with sand grains in a cat litterbox.