<P> In 2011, Radziwill joined the cast of Bravo TV's The Real Housewives of New York City in season 5 . </P> <P> She sold her first novel, The Widow's Guide to Sex & Dating, in a high six - figure deal to Holt Publishing . It was released on February 11, 2014 . </P> <P> On August 27, 1994, she married fellow ABC News producer Anthony Radziwill in East Hampton, New York . Radziwill was the only son of Stanislas Radziwill by his wife, Lee Bouvier Canfield (younger sister of Jacqueline Onassis). Anthony Radziwill died on August 10, 1999 at age forty after a five - year battle with cancer . </P> <P> Radziwill was a close friend of Carolyn Kennedy, who was married to her husband's cousin, John F. Kennedy, Jr...Kennedy, Carolyn, and her sister, Lauren Bessette, perished in an airplane crash off the coast of Martha's Vineyard less than four weeks before her own husband's death . </P>

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