That's some very heavy accusations against a lot of people. Is this allegation made anywhere else, much less proven? I am afraid one controversial source (and several of the allegations made in the book have been questioned and even found to be inaccurate, by others besides me) As I said all this was discussed on another board and found to be unfounded. From what I recall of that investigation, no names were mentioned, a "Mademoiselle X" was often used. As I have said before, getting into my reasons for questioning what you post opens a can of worms that should remain closed. In the end, if the only reason to prove she 'betrayed' them was to back up an accusation by AA, that still leaves us nowhere, since AA was FS.
This is what doesn't make any sense, she was not guaranteed anything! She was not permitted to go with the family, along with others, because they were considered foreign nationals and the Bolsheviks did not want to imprison them and anger other gov'ts. Yes she was born Russian but she had a DANISH name that was taken for Swedish.
Did they really? Their books make no such suggestions. In all their books, they are working together trying to escape the Bolsheviks. They were always in danger as various factions took and retook the region, even the "Greens." Please read "Left Behind" for an interesting account of those tumultuous times, and if you think she wrote the whole thing to discredit AA, well that's just silly.
Much is quoted to this adopted son who never experienced anything personally, and likely his words have been taken out of context. On the other board, it was revealed any trouble between Gibbes and Bux stemmed from some sort of personal banking situation and an unpaid loan while on the run from the Bolsheviks- nothing to do with the family. Bux was broke, especially for someone who had allegedly embezzled 200,000 rubles meant for the family (another false allegation against her)
It's also not to be ignored that Sophie Bux. spent most of the later years of her life in the service of Alexandra's sister, Victoria Milford-Haven. If she were nearly as crooked and hated as you say I doubt this would have been possible I am really tired of this dead woman's name being dragged through the mud in an attempt to justify a false statement by a false claimant.