At the end of the day, the King will be bound by the advice of the PM. There is a reasonable chance that the PM at the time may advise that the wife of the King is the Queen, and the matter will end there.
I think so.. anyway Camilla's title will still derive from her husband,, ie Albert was Prince Consort, because he was Victoria's husband.. that' was the "precedent" that was mentioned years ago, for Cam to be Princess Consort..so IMO she wotn be a Princess in her own right, like Eugenie or Anne..