In the grand scheme of things 40 USD is not a lot but she has pissed me off.
I also know her real name. I wouldn’t go down this route for a small amount of money but is it worth giving the impression I would in the hope that she returns my money?
Its £35 quid, its a pain but it's not the end of the world
However you can say you wouldn't go down the highlighted route above but the very fact you thought about it enough to type it and 'ask advice' about it tells me you were actually considering it.
NO is the answer, on every level you want to look at it that is threats and blackmail territory and will get you in hotter water than you need as well as being morally wrong, I'm not saying pissing off with your dollar is morally right either but two wrongs don't make a wright as we all learnt as kids