


It turns out that Nelson's father has really gone to the Kwik-E-Mart (which Nelson has repeatedly stated previously in the series), where he gets a severe allergic reaction from eating a chocolate bar filled with peanuts. The Simpsons run in and find that the couch is missing (like in the couch gag for the season two episode Itchy & Scratchy & Marge), but this time, the couch falls from the sky and crushes the family. Late one night, Nelson is singing about his long lost father, while Lisa, unable to take any more starvation, is stuffing herself with an entire cake that Homer bought for Lenny. Lisa still hasn't found a conclusive solution to her weight problem.There is only one thing for it. Nelson is reunited with his father (and his mother who's returned from Hollywood with an acting job). When the pair returns to the Simpson home there is a surprise waiting for Nelson Bart has found his father. Lisa gets help from Nelson to get revenge on Sherri and Terri. Late one night Bart finds Nelson singing for the return of his father and Lisa overindulging in a cake (she'd previously been starving herself). Much to Bart's dismay Marge lets Nelson stay in his room. Nelson goes to the only place where he can find refuge, the Simpson home. Marge brings Nelson home to do some chores around their home, but Nelson's real mother returns that money that Marge paid her son and then she leaves for Hollywood, leaving her son in Springfield and homeless. Lisa tries diet and exercise to reduce her big bottom. She finds Nelson in the park and spends some quality time with him and when her kids continue to shun her, she adopts Nelson as a surrogate child. Marge is bummed that the kids don't appreciate her anymore. It's made worse when Lisa returns home only to be confronted by her mother wanting her to eat a big slice piece of cake, she runs out of the room crying. It's the worst party ever as far as Bart's concerned.

Lisa is trying to deal with her weight issue, meanwhile Bart gets his party with his relatives, Ralph, Martin and Milhouse via speakerphone. Bart comes home with 100 on his test, and now he wants to collect on the party that was promised. Homer explains to her about the Simpson butt, it is something she'll have to learn to live with. Lisa is trying to deal with her weight issue, Lisa has a big butt and her friends at school, Sherri, Terri and Janie let her know about it.

Summary: Lisa has a big butt and her friends at school, Sherri, Terri and Janie let her know about it.
