Mary Martha Warner, formerly of Penn Hills, PA., age 97, passed away peacefully on Friday, October 2, 2020 - The Feast Day of Guardian Angels. The daughter of James & Elizabeth (Mooney) Riley, Mary was born in Pittsburgh and grew up on Liberty Avenue in Lawrenceville during the Great Depression. She married her husband, John Andrew Warner, on November 28, 1941 and they spent 54 wonderful years together before his passing in 1995. Mary was the devoted mother of John D. Warner and his wife of 53 years, Agnes. Loving Grandmother of Christopher J. Warner (Anne), Amy L. Volpe (Joseph) and Great Grandmother of Brayden, Harrison and Grayson Warner; Isabel and Sofia Volpe. She was proceeded in death by her siblings: Virginia DiBiase, John Riley, Jerome Riley and Elizabeth “Libby” Meiers. Also survived by nieces and nephews. Working at the Joseph Hornes Company in the East Hills Plaza for 20 years, Mary enjoyed assisting customers with their interior decorating needs. After Hornes closed, she joined the PA State Unemployment Office in New Kensington, administering benefits to that community for over 10 years. Mary was a devout Catholic and active member of the St. Susanna Parish and the Ladies of Charity, where she spent much of her time and energy on various fundraising projects as well as supporting families grieving after the loss of a loved one. In 2008 Mary moved to Carnegie, PA and continued her charity work at St. Luke’s Parish. Driven by a passion for cooking and entertaining, Mary enjoyed hosting gatherings of friends and family her entire life. She never showed up to a celebration without an oversized basket of fresh baked cookies or pies, crafted with love and garnished generously with penny candy. The Holiday Season was always her favorite time of the year when things really kicked into high gear. From decorating the tree and wrapping piles of presents to displaying her prized Santa collection, Grandma Warner stopped at nothing to ensure everyone she knew was remembered in her own special way. A Christian Mass & reception to celebrate Mary will be scheduled at a later date due to the pandemic. In lieu of flowers, the family requests donations be made to: Western PA School for the Deaf, 300 E. Swissvale Avenue, Pittsburgh PA 15218 or to Western PA School for the Blind, 201 N. Bellefield Avenue, Pittsburgh PA 15213.