Even in Chabad I don’t think they claim the Rebbes wife worked for the NYPL system anymore. I’ve seen Chabad documentaries about her none of which make such a claim. She is now descried as “the quiet woman behind the scenes”
One general observation that comes from reading pro and anti Chabad books about the rebbe is that no one really knew him. Not just after he became rebbe. He and his wife were about 50 at the time, yet in all the pro and anti Chabad books about his activity before he became rebbe not one ever mentions any friends that either of them had. Plenty of people came in and out of his life in various business or academic type relationships . None of them claimed to have been personally friends. Or mention anyone else who was friends with them. No one had any stories of the rebbe attending a simcha because back in Russia…Berlin…Paris… etc
After he became rebbe it was even worse. He did not have any talmidim in the sense of someone who could discuss the kashas he had on what was said by the sichos with him. Even R’ Yoel Kahn was not free to talk to him without permission from his secretaries. Leibel Groner claimed that in all the years of being gabbai, not once did he ever initiate a conversation with the rebbe. Let aloe those who had limited access to him