Conversation so far:
Are there any other interesting aspects about this article?
In the multi-volume memoir The Diary of Anais Nin (1931-74), Anais Nin said she had a love affair with Vidal, who denied her claim in his memoir Palimpsest (1995).
Who was Anais Nin?
regarding Nin, in the online article "Gore Vidal's Secret, Unpublished Love Letter to Anais Nin" (2013), author Kim Krizan said she found an unpublished love letter from Vidal to Nin.

Question: What else is notable about Vidal's private life?
Self-contained rewrite: Besides Gore Vidal´s unpublished love letter, what else is notable about Vidal's private life?