Frank Sinatra's affair and relationship with Gardner had become more and more serious, and she later became his second wife.Sinatra later expressed regrets at having married Nancy saying "What I had mistaken for love," he ruefully stated later, "was only the warm friendship Nancy had brought me." Kitty Kelley claims that Sinatra had first seen photographs of Ava Gardner in a magazine and had sworn that he would marry her.Nancy Barbato Sinatra and Frank Sinatra announced their separation on Valentine's Day, February 14, 1950, with Frank's additional extra-marital affair with Ava Gardner compounding his transgressions and becoming public knowledge once again.
Following their move to Hollywood, Los Angeles, California, Sinatra errantly strayed from his marriage into extra-marital affairs, the first known with Marilyn Maxwell.
The two remained friends until Sinatra's 1998 death.
Sinatra had three children with his first wife, Nancy Barbato: Nancy Sinatra (born June 8, 1940), Frank Sinatra, Jr.
These affairs also became public knowledge and caused great embarrassment to Nancy Barbato Sinatra, who considered calling off their marriage then and had an abortion when she became pregnant in 1946.
A third child, Christina Sinatra, known as "Tina", was born on June 20, 1948.