De Boef was born in 1951 in
Jasper County, Iowa. Her parents were George and Anna Den Besten. She grew up on a farm outside of
Prairie City. She graduated from
Pella Christian High School and
Dordt College. She was a member of the Oskaloosa Christian Women's Club and the Mahaska County Republican Central Committee. She runs a family farm and wood grinding business. She married her husband, Harold De Boef, on February 20, 1971, and the couple have two sons and two daughters. == Political career ==