Kourtney's resentment towards her mom rises to the surface again after Kris releases a memoir detailing the affair that destroyed her first marriage. Unable to keep her attitude (and pregnancy hormones) in check, Kourt's nasty digs and comments toward Kris reach a whole new level, forcing her sisters, and even Scott, to confront her behavior. Will she get to the root of her anger and forgive her mom? Meanwhile, Kendall and Kylie start their gig at "Seventeen" magazine, but the job causes a rift between the usually close sisters.