Dame Judith Underdunk

Dame Judith Underdunk is the mother of Sideshow Bob and Cecil Terwilliger and the wife of Robert Terwilliger Sr.. She and her husband aided their son Bob with his latest scheme to kill Bart. She has a daughter-in-law named Francesca Terwilliger and a grandson named Gino Terwilliger. She is currently in prison along with the rest of the Terwilliger family.