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Jackie Kennedy's Ex-Lover Claims She Told Him Marrying Aristotle Onassis Was 'Biggest Mistake'

Jackie Kennedy Onassis told her former lover that marrying Aristotle Onassis was the biggest mistake of her life...this, according to a bombshell new memoir. John Carl "Jack" Warnecke -- who dated Jackie from 1964-1966 -- wrote in his…

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