Susan never married, but had a relationship with a woman named Anna Dickinson before forming a close companionship in her later years with Emily Gross, a Chicago woman who was the wife of a wealthy businessman, Samuel Gross. Susan wrote about her in letters to friends and relatives. "I shall go to Chicago and visit my new lover — dear Mrs. [Emily] Gross — en route to Kansas. So with new hope & new life…", Susan wrote. Although the two never lived together, they managed to spend long periods of time together until Susan's death.
https://www.wikitree.com/wiki/Anthony-14