She visited him frequently at the White House and was known to be one of his mistresses, according to another biographer, Nina Burleigh.
Meyer was murdered in Georgetown in 1964, two years after the tragic death of Monroe, in an execution-style shooting that has never been resolved.
Kennedy would remark to anyone who would listen, from British Prime Minister Harold Macmillan to a lowly senatorial aide.
Summers said she never envisioned herself on the pages of Playboy.
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The nude shots splashed all over magazines and newspapers worldwide, earning Jackie the moniker 'Billion Dollar Bush', and affording her children years of cruel bullying.