In 1990, Rupp returned to New York City to perform in a Broadway stage production of "Cat on a Hot Tin Roof" with Kathleen Turner at the Eugene O'Neill Theatre. In it, Rupp portrayed Mae (Sister Woman). Her television work during the early 1990s included recurring roles as Ms. Higgins on the television "Davis Rules" with Randy Quaid, and as Sister Mary Incarnata on "Phenom" with Judith Light, as well as guest roles on "Blossom", "Family Matters", "L.A. Law", and "ER".