I know this is an old thread, but I just finished reading Dark Side of Genius by Donald Spoto, a very interesting read BTW, and like the previous person said she had a falling out with Hitch over marrying and becoming pregnant. He saw himself as Pygmalion and basically wanted complete control over his "Galateas" as it were. If they didn't do everything he wanted them to do or thought they should do, he was very put out. This was the case with Miles. The final nail in the coffin (bad pun) for their relationship was when he commented that her having a third child was "obscene".
Laissez les bons temps rouler!

Very interesting. I believe Hitch may have been in love with Vera. Remember Vertigo was to be done for Vera as a showcase but she became pregnant. They say Hitch was none too pleased and lost interest in the project (hence he was very indifferent to Kim).

She has retired from public life, I know she has been approached to do participate in a few hitchcock projects other documentaries but she always declines.