Katie lands the perfect pawn to play on the insecurities of the Westport housewives when she convinces a hot young trophy wife named Harper to volunteer as room mom for Anna-Kat's class, but she quickly shifts gears when Harper rejects Anna-Kat's idea for movie night. Meanwhile, Greg enlists the help of the kids to get Katie's mom, Kathryn, to take an interest in someone other than herself.
Katie Otto, a confident, unapologetic wife and mother of three, raises her flawed family in the wealthy town of Westport, Connecticut, filled with "perfect" mommies and their "perfect" offspring. Katie's perfectly imperfect world is upended when her neighbor's decision to move notches her up from her ideal social standing and sets her on a path to ensure that doesn't happen, regardless of the consequences. She lets us in on her deepest, most unfiltered thoughts through voiceover as the she lives her life as the second fattest housewife in Westport.