Beloved wife of the late James Mastrodicasa; devoted mother of Frederick (Sherry) Costantino; dearest stepmother of John (Melissa) Mastrodicasa and Christopher Mastrodicasa; cherished grandmother of Cassandra Costantino, Jessica (Gary) Westburg, Frederick A. (Kayley Omlor) Costantino and Matthew (Miranda) Costantino; adored stepgrandmother of Johnny Mastrodicasa and Vincenzo Mastrodicasa; also survived by many loving great-grandchildren and her beloved cat, Cloey.
Mary Grace maintained her laughter and kindness, grace and compassion and love of family and friends until the very end. She was a beautiful soul to all that had the privilege of knowing her. Her journey was priceless and she will be forever in our hearts.
Relatives and friends may visit Dengler, Roberts, Perna Funeral Home, 3070 Delaware Ave., Kenmore, NY 14217 on Thursday (January 15, 2026) from 2-4:30pm, where a memorial service will immediately follow at 4:30pm.
In lieu of flowers, contributions in Mary Grace's memory may be made to the SPCA Serving Erie County, NY 300 Harlem Rd., West Seneca, NY 14224.
Mary's favorite words were "I love you more!"
Mom/Nana: "We love you most!"
