After admitting he hooked up with his space camp buddy Lana,Brad begs for forgiveness from Lily until he learns of his infidelity. Sean learns something intresting about Claudia,which he doesn't tell her.
Eddie convinces Sean that he has Sympathetic Pregnancy Syndrome. Brad and Lily decide to be friends, but they find this difficult to do. Meanwhile, a girl named Taya moves in next door, and Jimmy tries to get her attention by pretending to be a jock. Eddie enters an interesting relationship with his ex-girlfriend, Faye.
Because Eddie now has a girlfriend he spends all his time with her. Sean being jealous finds every possible thing wrong with her. Lilly's plan to make Brad jealous doesn't work and Claudia gets mad because Sean tells everyone she is pregnant.
Eddie moves into the Finnerties basement, struggling to hide his activities from Claudia. Meanwhile, Claudia's more worried about performing all of her motherly duties while pregnant. Finally, Lily's jealousy of Brad's new girlfriend causes her to act out.
Claudia is upset with Sean when she finds out he gambled the money for the baby's crib and used the winnings to buy a new TV.
Brad and Lily engage in a fierce race for Student Body President. Eddie tries to understand his life by going to a shrink, and Sean promises Claudia not to reveal the sex of their new baby.
Sean's friend Dave comes to town and stays with the Finnertys. Now a children's performer by the name of "J.J. Bodybuddy", Dave is volunteered (by Sean) to perform at St. Finnian's. Before the day of the performance, however, he wants to have a fun night on the town with Eddie and Sean. Meanwhile, Lily is already jealous of the unborn baby and is willing to do anything to show her mother that.
Sean and Claudia worry that the bar isn't bringing in enough money. Claudia begins working at home, calling people up to demand payment on unpaid medical bills. Sean applies for a position at TJ Shenanigans, only to find that he'll be competing against his own brother to get the job. Meanwhile, having just broken up with Brad, Taya starts dating Jimmy.
Claudia feels unattractive being pregnant, so Sean pays one of her classmates to hit on her. Meanwhile, Eddie writes a comedy routine with some help from Lily, and Brad enrolls Jimmy in the Sciencenauts.
After an uninspiring meeting with the school guidance counseler, Lily wants to prove her intelligence. When Brad decides to apply at Yale, Lily does, too, but she realizes she must do something to make her application stand out. Meanwhile, Claudia pities Sean after he takes on an extra job as a limo driver, and Eddie helps Jimmy prepare for his role of Tom Sawyer.
Sean is infuriated after receiving several letters from the Home Owner's Association telling him to clean his yard. He's determined to put an end to these demands, despite Claudia's happiness about the changes in the neighborhood. Meanwhile, Brad wants to buy Lily lingerie for their anniversary, but receives a shock when he sees Sister Hellen at the store. Elsewhere, Jimmy worries about how the family will support his new lifestyle change.
Eddie's girlfriend Crazy Amy returns and starts selling nude photos she took of Eddie. Meanwhile, Sean tries to sell the Red Boot and Jimmy joins cheerleading to get close to girls.
In this episode, Claudia and Sean miss Lily's graduation. Which ruins the senior prank she had planned. Then Claudia goes into labor. Sean and Eddie find out that Walt's cleaning lady is his girlfriend.