Age 58, of Scott Twp., on Wednesday, July 13, 2022. Beloved wife of 35 years to David W. Seybert; loving mother of Bryan Seybert (Holly), Justin Seybert, and Marissa Paioletti (Caleb); grandmother of Annalisa and August; and sister of Joseph Benacquista (Lorraine). Also survived by many nieces, nephews, and other extended family and friends. Diane was predeceased by her parents, Frank and Yolanda Benacquista and her brother, Frank Benacquista. Diane had a lifelong devotion to Our Lady of Grace Church and School, where she served as Director of Advancement, Administrative Assistant, and part-time teacher. She also played piano as a mass accompanist and volunteered countless hours to school and church events. As a final chapter in her career, she served as Development Assistant at Baptist Homes. Family and friends are welcome on Sunday, July 17 from 2-4 and 6-8 PM and Monday, July 18 from 6-8 PM at WILLIAM SLATER II FUNERAL SERVICE, 1650 Greentree Rd., Scott Twp., 15220, 412-563-2800. Mass of Christian Burial, Tuesday, July 19, 10:00 a.m. in Our Lady of Grace Church, St. Michael the Archangel Parish, 310 Kane Blvd., Pittsburgh. Interment private. In lieu of flowers, memorial donations may be sent to the American Cancer Society.