Diane Mahlstadt, 64, of West Islip, NY, formerly of Valley Stream, NY, entered into Eternal Life on February 5, 2021. Beloved wife of Jerry Mahlstadt. Cherished mother of Jennifer Underwood (Matthew) and Janine Barbera (Jeremy). Adored grandmother of Ellie, Zachary and Juliana. Devoted daughter of Violet and the late Vito Scudiere. Dear sister of Doreen Morgese and Christine Laurita. Friends and family may visit Tuesday at the Claude R. Boyd-Spencer Funeral Home, 1:30-4:00 pm and 6:00-8:30pm. A funeral mass will be celebrated on Wednesday at 10:00am at St. Patrick RC Church, Bay Shore, NY. Interment to follow at St. Charles Cemetery, Farmingdale, NY