Ah OP, I’m sorry, I’m sure the exclusion really stings.
At times like this I always advise to take yourself out of the equation and imagine this was a good friend coming to you with this conundrum. Or even better, your daughter:
If they had been excluded from a big family wedding with no initial explanation, what would you tell them to do? Swallow their hurt feelings and still invite the couple that had ruthlessly cut them out? I suspect you’d be raging on their behalf - but sometimes we can struggle to treat ourselves with the same love and respect that we would give our daughters, our mums, our friends. By imagining this happening to someone else, it allows you to sidestep those personal feelings and figure out what you’d tell someone else to do.
How will you feel seeing them in your wedding photos in the years to come? In your shoes, seeing them there would make me feel like a fool.
And also most gently, what would your dad tell you to do? What would he say about his niece cutting his daughter out of the wedding - would he tell you just to suck it up? Only you know what he’d have told you to do 💐 I say this also as someone who has lost their dad and is facing a tricky wedding dilemma about how to handle his absence, so I get how hard it is, I really do.
PP on here aren’t trying to kick you, they’re just angry on your behalf. Take the time you need to really think about how this all feels and the options you have available. What’s your DP’s thoughts on this?
I would make it widely and clearly known to all your aunts and uncles that you aren’t invited. It might make you feel a bit better if you see that they’re outraged on your behalf. Personally, I think I’d be “having to re-budget” for the wedding and cutting some unavoidable costs……. I also hope you haven’t invited them to your hen do!!
I am sorry, I know this is just really shitty for you 💐