Is it rude to not invite my fiance's brother's girlfriends to our wedding?

Some back story here. My fiance is the eldest of 3 boys. He takes care of his brothers financially and his parents. This also translates to often paying for his 2 little brother's girlfriends expenses (example: we pay for everyone when we go out to eat, we pay for the families living expenses and the girlfriends partially live there). This will technically be our second wedding. We had a wedding(more like a long lunch at a nice hotel) overseas for our extended family, hosted by my fiance's family(even though we paid for it). The brother's girlfriends came. We paid for half of their hotel stay. The wedding in the US is technically more for my side of the family as 80% of the guest list will be from my side. Do I HAVE to invite them? They've already been to one. Granted the US wedding is the "real wedding". We're going to end up paying for their expenses and honestly I have so much resentment against them. There's definitely more to this story, and I know it's literally my fiance's fault for not setting boundaries with his family, but it is what it is. DO I HAVE TO INVITE THEM? PS: thank you for letting me vent a bit :3