Christopher Andrew's book and the story of a dog

Professor Christopher Andrew, from Cambridge, wrote the official history of MI5, The Defence of the Realm. The part of the book dedicated to WW2 is comparatively small. One looks for events in which MI5 was involved and finds no trace of them. Some occurred involving Portuguese, arrested in Camp 020 as spies.
I read parts of the book, just published, basically what is written about a case I studied with detail, Nathalie Sergueiew's mission for the XX Committee, for which she worked as a double agent, codenamed Treasure. Please allow me to remember my biography of this extraordinary woman.
With due respect, what could be said about her is simplified in the short version given by Professor Andrew. But what surprises me is the outline of Treasure’s personality as «a temperamental woman» someone that almost blew up D’days operation because of a dog! Saying so, Professor Andrew reproduces what has been disseminated through the National Archives site and after Kenneth Benton, PCO and MI6 man in Madrid, wrote it in a short story of his life after his memoirs of his encounter with a young lady aplying for a visa to the UK: that she confessed to her British controller, Mary Sherer, that, irritated because the dog Bab’s was not given back up to her by the British, as promised, she threat to betray them in benefit of the German Abwehr, that candidly took her as one of the best assets in UK.
This version of the facts cannot be accepted without scrutiny. The problem of Sergueiew is very complex. First, she is a white Russian anti-communist, and British alliance with Stalin’s is not easy accepted in the circles where she came from. Second, it is possible to find if not a clear sympathy for the German nazism, at least for German values, in the first book she wrote in 1933, despite the fact she had been arrested by the Gestapo while in Berlin. Extreme conservative were the kind of newspapers she read and the organizations she had been in contact with, during her youth. But more important are two facts that are not mentioned in that regrettable dog’s story simplified version: her sister was found dead in very strange conditions an there are documents that show that Treasure was blaming the British Secret Service for that, claiming that she was the target; and there were deep connections between Stalin’s/Hitler operation against the White Russian ROV’s in Paris, and the kidnap of general Miller – his uncle! – and the German controller that was assigned to her, major Emil Kliemann, from Luft Eins. So, there is much more to justify her desire to cut with the British than that naïve dog's story! So allow me to ask: if she wasn't a woman, would that «temperamental» version be given as an explanation for the facts?
A final remark: Babs, a Fox-Terrier, was not kept in Lisbon, as it is written about one of the photographs published in Professor Andrew’s book, but in Gibraltar in November 1943. Nathalie flew to Lisbon in January 1944 only, some months afterwards, already without any dog at all. If truth must be said about the woman, the same to Babs!