On June 28, 1952, Margaret married William George Kernan (1933-), the son of Delmar Clair Kernan (1908-1979) and Maxine Elizabeth Davis (1912-1992), at St. Peter Catholic Church in Portland, Oregon. Margaret and William had five children between 1953 and 1957: Patrick Joseph Kernan (1953-1992), Vicki Rae Kernan, Richard Allen Kernan (1955-1999), William Clare Kernan, and Terry Lee Kernan.
In about 1961, Margaret and her family moved to Huntington Beach, California. There, she attended some college courses and became a bookkeeper, later working for the Southwestern artist Jack Black. In about 1989, Margaret and William moved to Tucson, Arizona. Margaret was a talented drawer and painter. She passed away on March 3, 2004 from cancer in Tucson, Pima, Arizona. She was buried on March 8, 2004 at Evergreen Cemetery.