Dorothy M. O'Reilly (née Cunningham), age 93, late of Orland Park. Beloved wife of the late George Arthur Petit and John Michael O'Reilly; devoted mother of Robert (Susan) Petit, Barbara (Edward) O'Connor, Timothy (Michele) O'Reilly, Christine (Dan) O'Reilly-Christine, and the late Tracey O'Reilly-Quinn; proud grandmother of 12 and stepgrandmother of 2; cherished great-grandmother of 13 and great-great-grandmother of 2; loving sister of the late Lois (late Elmer) Braun. A Memorial Visitation will be announced at a later date. Interment private. In lieu of flowers, memorials may be directed to St. Jude Children's Hospital , Shriners Hospital for Children , and Wounded Warriors .