The presence of Capote in this story makes it far less credible, IMO, insofar as he died in 1984. So, for it to be true, we have to believe Jackie was entertaining a second term governor of Arkansas who no one had heard of at that point.
Could have happened.....Jackie would have been in her 50’s
....and by many accounts, Capote was a big gossiper.
Not out of the realm of possibilities.
There is another way to look at it, though.
Pre 1984, Bildo may have been in NY at a political event as a governor and wangled a way to get o JAckie’s aprtment—ie—I was such a fan of you and your husband, the picture of a young Clinton shaking hands with Jack at the WH at a Boy’s State event in 1963, etc.
Also, this is much nearer in time to his MO of overpowering women physically to get his way—closer to 1978 when he raped Juanita Broaderrick twice in her hotel room.
When Bildo was more famous, the women came to him—ie Monica Lewinsky—he did not have to pursue them as much.
Jackie was of a different generation-more discreet—plus she was not inexperienced in her own extramarital affairs—Bill Holden could and did attest to that when he was alive.
I am not ready to discount it entirely.