My work such as I do these days involves a lot off cash in hand, Euro's as well so I am freqeuntly down the bank, travel agent swapping money. I always have had a fair amount of cash around to use without any paper evidence.
I do all the accounts at home and she has access but never looks as she as no reason. My problem will start when I decide to stop my work in Europe and fully retire, its getting difficult now as she has now retired early and is around all the time.