Equally, I wonder what sort of relationship she had with George Brassov, whose mother was similarly beyond the pail and who to the best of my knowledge she never even met? -
The Empress actually met Natalia Brasova in 1919 year in London, after arriving from the Crimea. The meeting was not an easy one, Natalia gave the Empress some photos of GD Mikhail, those MF had not seen before.
As for Georgiy Brasov then the Empress seemed saw him only once, in 1923, and again in London. His mother came with him to MF and the agitated Empress wrote in her diary after that: "he [Georgiy] doesn't resemble my Misha at all".
So, we can't speak about any real relationship between the Brasovs and the Empress.