A French-born dancer in a 'tasteful' Las Vegas nightclub, Rita Duvall once had a one-night stand with Johnny Fontane, who later asked her to offer her 'services' to Fredo Corleone. Unbeknownst to Fredo, this alliance resulted in the birth of his only child, whom Marguerite gave up for adoption. Prior to this, she had been girlfriend to the future President, James Shea.
By the Sixties, she had became Michael Corleone's girlfriend, and often attempted to bond somewhat with his children. The two eventually split sometime before he received the Order of St. Sebastian, though it was an amicable parting.