Mary moved to Bozeman, Montana, in 1916 and married Earl Nolan. By 1918, they had two young children, and moved to St. Paul because of a family health emergency. They decided to stay permanently in the area. Their oldest child, Nellie Mae, died of diphtheria in 1920, and a year and a half later, Mary and Earl divorced. Mary continued to care for her son, James, and worked as a laundress. She died in 1948 from long-term complications from rheumatic fever that she experienced while working at Fort Yellowstone.