Age 86, of Penn Hills, PA, passed away peacefully on February 28, 2021, surrounded by her loving family. Wife of the late William T. Eisel; loving mother of Noel (Erik) Harrie and William (Kimberly Stevens) Eisel; stepmother of Keith Eisel, Gary (Lisa) Eisel and Dale (Sally) Eisel. Devoted grandmother of Megan and Jack Harrie; sister of Patricia Cole and sister-in-law of Donna Eisel; also survived by step-grandchildren, a niece, a nephew, other family and friends. Mary Lou was a graduate of Case Western University. She was an avid traveler and took several trips around the world, which filled her life with great joy. She was also very fond of vintage cinema and live theatre. Services private, memorial contributions may be made to Animal Friends, 562 Camp Horne Rd., Pittsburgh, PA 15237.