@Goldenzeal if he thought her token was a fake there would be no reason to steal it really.
I dont think he thought it was a fake, he took it and swap it out with another temporary, likely wanting to make a better fake with it.
Hence why he wanted to borrow it first even though the one in his hand was a fake one.
He feared that his owner might notice the difference and got very defensive when she asked if it was her token.
I don't really understand why she let them get away with it, seems like a stupid move if you ask me. Why didn't she confront them on the spot rather than letting them go ? I dont get it.