 Deborah Jane Grassi "Debbie" Novotny (born Deborah Jane Grassi) is a supporting, loud heterosexual fictional character on the show.The mother (at 17) of main character Michael Novotny, Debbie plays a major role in her son's life, is a strong supporter of gay rights, and an active member of PFLAG.She is usually found either at her house or at the Liberty Diner, where she is a waitress.