I found out my girlfriend was paid to go out with me on our first date, should I confront her about it?

My friend said he had paid her to go out with me on our very first date, we're now officially a couple and he says he hasn't paid her since and that she's voluntarily been going out with me afterwards.

I found out my girlfriend was paid to go out with me on our first date, should I confront her about it?
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