Mary Lou M. Quint, 88 of Arlington Heights was born March 29, 1931 in Milwaukee, WI to Thomas and Genevieve (Brown) Flaherty and passed away peacefully March 14, 2020. Mary Lou was the beloved wife of 65 years of Jack O. Quint; loving mother of Eileen (late Brian) Renk, Brian (Constance) Quint and Kathleen (Lee) DePrey; cherished grandmother of Jamie (Derek) Simon, Jake DePrey, Jonathan De Prey and Joseph De Prey; great-grandmother of William Simon: dear sister of Thomas (Mary) Flaherty, Jean (John) Smerlinski, Margaret (late Carl) Mace and the late Eileen (late Carl) Lunowa and the late James Flaherty and fond aunt of many nieces and nephews.