aita

View Quoted Comment I’ve been to multiple weddings with no bf (when I was dating) or +1 when I was single. I was totally fine. I had a great time hanging out with friends. There is no specific way to do a wedding. And no one should assume or feel entitled to bring someone when they are not footing the bill. Weddings are very expensive. They are also to celebrate the couple. If someone doesn’t want to go solely because they can’t have a date then that’s their choice and I’m 100% fine with that.

I think the answer depends more on the nature of his parents’ divorce and whether this will add drama. And how your fiancé feels about it

View Quoted Comment The nature has been that they don’t interact with each other. At all. We all used to do big family holidays together (even with his first ex wife and kids). Everyone got along. Now there’s this new woman and she won’t allow that. She calls it “sister wives”. And refuses to have anything to do with my fiancé’s stepmom or mom. So in my opinion, if they can’t suck it up and celebrate Christmas or thanksgiving with everyone, and they have made it clear they don’t want to be around anyone, why would she get an invite to the wedding? That the epitome of celebrating with family.

Ooof, this post was kind of a wild ride. Obviously OP will do whatever they planned to do from the very beginning and continue to insist they have "no choice" in their life. The advice I will give at this point, is not to ask "AITA?" on a public forum if you are not prepared for the majority to answer "yes."

Also, vital information like the father in question cheated on his wife with this new person (well, not new; they've been dating for a year) and who is paying for the wedding should be included in the OP. We can only respond to the information we are given.

View Quoted Comment Yeah, I feel like that is a better reason to not invite her than your original reasoning.

View Quoted Comment I’ve never done one of these posts before and there’s a lot going on so I accidentally left info out because it’s a very complicated situation.

View Quoted Comment You shouldn’t speak on how expensive a weddinvg is when you aren’t even willing to pay for your own lol. And it’s incredibly rude, as everyone has pointed out, to ask someone to respect your relationship while disrespecting theirs.

View Quoted Comment Ummm I can absolutely discuss the fact that weddings are expensive when my parents are paying soooooooo yeah. And why should I respect someone who blatantly disrespects people that I care about who are ACTUALLY my future family? I don’t think you really know what you are talking about. Kindly move on from my post 😊

View Quoted Comment Based on your overall attitude and unwillingness to receive any feedback, I’d suggest logging off. You have plenty more problems ahead of you. If this is the reaction to strangers on the internet answering “yes” to a question you asked then you honestly have bigger problems to deal with. Don’t invite her. Who cares? Not you! You have that decision made up. No one here is going to validate that for you. You’re going to have many offended and angry guests. I’d save your energy for navigating that when the time comes.

View Quoted Comment Whenever this comes up , which is frequently, I find it aggravating..... Your father took marriage vows. Your father broke his marriage wows. But the family focuses all it's anger on her, the other woman. Get. over it. If you are going to punish anyone for a moral
Lapse, of breaking vows, let him make you uncomfortable, not his girlfriend.

View Quoted Comment

I think you misunderstood... OP's parents are paying for the wedding. It's OP's fiances father (presumably not paying) who has the girlfriend.

But I agree with your #1-3.

I didn’t read the rest of the responses yet so this may have been covered- but it’s extremely rude to not include significant others. Especially the father of the groom’s significant other. Also, these are not +1s, they should be invited by name.

View Quoted Comment Then maybe you should pay for your own wedding and change to a venue that can accommodate for your guest list?

OP is going to go ahead and disrespect the relationships of her nearest and dearest while inviting them to celebrate hers.

Cool.

You have to invite spouses and fiancés. Some would extend to live in or long term partners, but that is optional. Talk it over with fiancé.

View Quoted Comment Yikes.
Maybe they say they are fine with it to your face but I guarantee you they are having not so favorable conversations about this behind closed doors.