The daughter of an automobile salesman and a homemaker, Mary Lou Blake was born and raised in Niagara Falls, N.Y., where she graduated in 1948 from La Salle High School.
She earned a bachelor's degree in 1952 in medical technology from the University of Buffalo, and the next year married Donald M. Scott, an electrical engineer.
The couple shortly thereafter moved to Severna Park, where they settled in the Ben Oaks community. During the 1950s, Mrs. Scott worked as a medical technician at St. Agnes Hospital.
After raising her children, she returned to work during the 1980s and served for the next decade as a medical technician at Anne Arundel General Hospital.
Mrs. Scott and her husband spent many years sailing on the Severn River, said a daughter, Carolyn Roberts of Kingsville.
"In addition to sailing and boating, she enjoyed snow skiing. She was an outdoors girl," said Ms. Roberts.
Mr. Scott, who worked at Westinghouse Electric Corp., died in 2000. In 2004, she married George Bone, who was also a Westinghouse electrical engineer and a Ben Oaks neighbor.
In 2008, the couple moved to the Charlestown Retirement Community in Catonsville, and after her husband's death in 2011, she moved to Oak Crest Village, the Parkville retirement community.
She was a communicant of St. John the Evangelist Roman Catholic Church in Severna Park.
Mrs. Scott, who was also an avid dancer, was a member of the Panhellenic Club of Annapolis and the Ben Oaks Garden Club.
A funeral Mass will be celebrated at 11 a.m. July 29 in the chapel at Oak Crest Village, 8800 Walther Blvd.
In addition to her daughter, Mrs. Scott is survived by two sons, Jeff Scott of Glen Burnie and Greg Scott of Santa Clara, Calif.; a stepson, Roger Bone of Hanover, Pa.; two stepdaughters, Nancy Alexander of Estes Park, Colo., and Diane Hornby of Firestone, Colo.; and 17 grandchildren. Another son, Mark Scott, died in 2011.