Lisa is invited to Addy Lancer's birthday party; Lisa bonded with her over a mutual love of books and
horses.
Bart makes fun of Lisa's love of horses, causing her to symbolically sever their sibling relationship. Addy turns out to be quite wealthy, with horses of her own. Her friends, however, are cruel and cliquish, and quickly begin to bully Lisa, but Addy refuses to join in. Addy excuses herself to the bathroom to talk to Lisa, and tearfully admits that she invited her so that the girls would have someone besides her to make fun of, like they have been doing for years. Lisa gives her a hug and says that if Addy's friends bully her all the time, then they were not her friends to begin with. Addy doesn't believe this and starts to behave erratically, saying that Lisa should bring a similar nerdy friend so the girls can bully her and Lisa can be like them. Lisa runs away as Addy asks to put strips on her teeth. Unable to contact her parents who are on a sunset cruise, Lisa calls Bart for help. Bart arrives, but insists that Lisa get revenge on the girls by mutilating their hair as they sleep. Caught in the act, Addy comes to Lisa's rescue by taking the blame, allowing her and Bart to escape. She symbolically severs her friendships with the girls, saying that she can be just as cruel as they are, which they respect. Meanwhile,
Homer takes
Marge on a booze cruise. After getting in a fight with the band's singer who he thinks is hitting on Marge, Homer nearly ruins the trip. He reminds the crowd that leaving the house is hardly a pleasure for middle-aged people, and the passengers are inclined to agree. ==Production==