The only thing I think that prevented AA from seeing Virubova, or vice-versa is that Anna really became a recluse, she became a nun and did not want to see anybody. She did write another book, but it is in Finish - I guess we will have to wait until it is translated.
Interesting. A nun would hardly be a candidate to be called 'liar' or 'money grabber' so if she denied AA they'd have no excuse. Again, no wonder AA didn't want to see her.