Marge kicks Homer out of the house after she discovers that he revealed her personal secrets to an adult education class.
Homer feels dejected after his poker-playing friends refer to him as “slow.” He relays his feelings to Marge. She suggests that he take an adult education course so he can sharpen his intellect. When Homer realizes that his friends are teaching classes at the Adult Education Annex, he approaches the administrator for an instructing position. He is hired to teach a course on marriage. At first, Homer is enthusiastic about his new position. He comes to realize, however, that he has no idea how to run the class. His students draw the same conclusion and begin filing out of his classroom. When Homer begins revealing personal secrets about Marge, however, the students return and listen carefully to every word.
Marge learns what transpired and warns her husband not to breathe another word about her personal life. Try as he might, Homer cannot stop himself. Moe teases Homer about nibbling on his wife’s elbow—one of the personal secrets Homer promised not to reveal—right in front of Marge. She becomes enraged and kicks her husband out of the house.
Marge refuses to forgive Homer, telling him he betrayed her trust. Homer takes up temporary residence in Bart’s tree house, hoping Marge will change her mind. Reverend Lovejoy encourages Marge to seek a divorce. Lisa tells Homer that the only way to win Marge back is to give her the one thing no one else can. Moe takes advantage of the situation and makes a pass at Marge, but he becomes panic-stricken when he sees Homer and runs from the house. Homer pours out his heart to his wife. He promises never again to lose her trust. He tells her how much he loves her. Moved by Homer’s sincerity, Marge forgives him.
Source: 20th Century Fox