KELLY, Margaret C. (Desmond), of Arlington, formerly of South Boston and Cambridge. Passed peacefully at the age of 102 in her home on January 21, 2020. Beloved wife of the late Patrick J. Kelly, Sr. Loving mother of Joseph P. Kelly and his wife Sarah of Arlington, Colin T. Kelly of Cambridge, Margaret E. Crowe of South Boston, Evelyn M. Dore of SC, William F. Kelly of FL, and the late Patrick J. Kelly, Jr. She is also survived by many loving grandchildren, great grandchildren, and great great grandchildren. A Memorial Service will be held in May.