Gil and Helen's younger sister, Susan, is a middle school teacher married to scientist and researcher Nathan Huffner. They have a precocious daughter, Patty. Susan wants more children but Nathan is more interested in Patty's cognitive development. Susan lashes out by eating junk food and compromises her diaphragm as a plan to get pregnant against Nathan's wishes. She eventually gets so frustrated that she leaves Nathan, who eventually comes to one of her classes and serenades her to win her back promising her he will try to change. She agrees to move back home.