Martha "Mamah" Borthwick is primarily noted for her relationship with Frank Lloyd Wright, which ended when she was murdered. Borthwick earned her BA at the University of Michigan in 1892. She later worked as a librarian in Port Huron, Michigan. In 1899, Borthwick married Edwin Cheney, an electrical engineer from Oak Park, Illinois, USA. They had two children: John (1902) and Martha (1905). Mamah met Wright's wife, Catherine, through a social club.