Jackie Kennedy’s Sister, Lee Radziwill, May Have Had an Affair with John F. Kennedy

Writer Gore Vidal, who shared a stepfather with Lee and Jackie, once wrote that Lee’s first husband, Michael Canfield, confided in him that his then-wife had slept with her brother-in-law.

“There were times when … I think [Lee] went perhaps too far, you know?” Canfield allegedly told Vidal. “Like going to bed with Jack in the room next to mine in the south of France and then … boasting about it.”

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As the biography notes, it’s unclear whether Vidal is telling the truth. He bore a complex relationship with both sisters through the years and was known for a proclivity to gossip. However, this would make any resentment Jackie would harbor toward Lee — even in her dying days — logical.

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