Jackie Kennedy ‘had four-year affair with Bobby Kennedy’
The former first lady was so in love with Mr Kennedy, that when he was shot during his presidential campaign in 1968 it was her - not his wife Ethel - who instructed doctors to turn off his life support machine.
Ethel was aware of the affair but chose to ignore it, according to Bobby and Jackie: A Love Story, by C. David Heymann.
Several political insiders and celebrities are quoted in the book, which will be published in the US next week.
"Everybody knew about the affair. The two of them carried on like a pair of lovesick teenagers," the late Franklin Roosevelt Jr, who served in John Kennedy’s White House, is quoted as saying in the book, the Daily Mail reports.
"I suspect Bobby would’ve liked to dump Ethel and marry Jackie, but, of course, that wasn’t possible."
Kennedy historians have said the book exaggerates the relationship between the pair, but Mr. Heymann, who has written extensively on the family and claims to have trawled through FBI and secret service records, said Bobby Kennedy was the former first ladyone "true love".
He claims their romance grew from their shared grief over the assassination of John F Kennedy in 1963.
"It was the coming together of a man and a woman as a result of his bereavement and her mental suffering at the hands of her late lecherous husband," Jackie’s confidant, writer Truman Capote is quoted as saying in the book.
"It was passionate but it was doomed," he added.
Mrs. Kennedy married Greek shipping magnate Aristotle Onassis four months after Mr Kennedy died.
The Daily Telegraph