I'm reporting simply what I read on a book:
In 1948 a baron named Werner von Biel told the reporter George Herald that Tatiana was alive, under the false name of Katharina Lumpesaite and worked as a nurse in a refugee camp in the area of Germany still occupied by the English. In fact, when Herald saw the woman, she was quite similar to the Grand Duchess, but she firmly refused his interwiew saying that her father was a simple peasant from Lituania.
Until here nothing strange, it was not the first time, but then something very curious happened. He showed her a series of documents which should testify of Tatiana's escape, and suddenly the nurse got pale, unable to say one word then shouted more or less: "Leave me in peace! I'm fully satisfied with my job, I have learnt to earn my living. I'm glad now, and I don't want to suffer any longer!"
Then she kept doing her job ignoring all the insinuations about her, which in fact ceased after a while as it was not easy to make a scoop with such a reaction...
Was it true? God only knows. But surely if someone came to me and told me I'm a survivor of an imperial family, I would laugh or think he's bad: this frightened reaction is very strange for one who is totally extraneous to the facts, don't you think?