She was indeed hawt.
I remember reading Leary's 'Flashbacks' - He claimed that JFK and some others dropped acid at the white house, Kennedy went outside and said 'This isn't like cocain at all...'
But Mary Pinchot Meyer told Leary that he wouldn't believe what was going on at the white house , not just in terms of drugs/sex but what the CIA et al was up to.
She was murdered by a canal in 1964, the police tried to blame some black guy who was fishing near by.