Age 76, of Mt. Lebanon, on Monday, April 27, 2015. Beloved wife of Col. L. Peter Ache Ret.; dear mother of Stephen J. (Mary Ellen), Peter S. (Kimberly A.) and David C. (Kimberly K.) Ache; loving grandmother of Anna, Brooke, Jack, Kyle, Owen, Katie, William, and Stephen; sister of Joan, Patti, Peggy, William, Bobby, Billy, and John. Catherine was preceded in death by her parents, William L. and Katherine E. (Mooney) Pfister. She was a member of St. Bernard Church.