Well, her madame wasn't happy with her creations and she has been fired. That we know, so maybe she isn't currently a whore. That said, of course, she's an experienced whore and her bio says that she knows she has a talent for fucking and also that she wants to become the best whore in the world. So... we'll see.
We know she HAS worked (or at least fucked people), but yeah, she pissed off her boss to the point that the MC can't even go in there as a paying customer just by association.
But, once she becomes a love interest (which I presume she is now from a story perspective), she will no longer be "banging other dudes" for money, or anything else, because that would break the No NTR promise made by the team.
While I can see the MC being happy to own a brothel, he grew up in one after all, and all of his moms worked there, but he doesn't need money, and he is going to be way too busy running the kingdom and keeping his women happy.
not a ntr but not fit in harem games either. I don't think people who likes this kind of games would like their lover interest get whored out to other dudes even tho mc is pimping her. I'm sure this game won't have a thing like that. As it stands her being a whore conflicts with harem settings but pretty sure she will stop being a whore in later stages of the game and fall in love with mc and join his harem. Maybe try your luck in cuck/ntr games if it's your thing?
If it there to make the player jealous, then it counts according to rules here.