Lucy is Connie Corleone’s best friend who serves as maid of honor at her wedding. She is also Sonny Corleone’s longtime mistress. At the wedding, Lucy escapes into the Corleone house to have sex with Sonny. Although this creates strains in Sonny’s marriage, they carry on this affair until Sonny’s death, and the Corleone Family often uses Lucy’s Midtown Manhattan apartment as a safe house. After Sonny’s death, Tom Hagen sends Lucy to Las Vegas, where she receives a small share in a Corleone Family hotel. There, she begins dating Jules Segal but laments that Sonny was the only man who could make her climax during sex. Segal discovers that this is due to her pelvic malformation, and connects her with a skilled surgeon who fixes her problem. After the surgery, Lucy marries Segal.