Hey OP, I’m really glad you took the courage to reach out to a potentially more neutral place than existing friends. I haven’t voted as neither option for me is true. I don’t think this is down to be reasonable or not. I think this is a highly loaded situation and occasions like these emotions run high because understandably we each have our own perspectives and just because your bro hasn’t seemed to have advocated for you doesn’t mean that isn’t really hurtful or that he didn’t want to. With the best will in the world, if he struggles to advocate or speak up or influence with his partner, he’s likely to struggle to do that in all his relationships. If you live him, I think it would help your relationship to release this expectation on him and the idea that it’s about you. If you want to have a good relationship with him, try to put hurt aside and work with him on your relationship. It will go way beyond this wedding. You’ll need each other in future and this is potentially a small moment compared to what might come.
I also really want to acknowledge your feelings. Not being invited or included feels wretched. It’s the worst.
I cringed when I read about how your mum insisted. Im sorry but to me i fear It might have been experienced as subtle manipulation. And people will push back against that. It makes people feel unsafe or untrusting. It’s the opposite of building connection in relationships. Giving stuff also needs consent and some people struggle to decline gifts. It can be seen as a way of injecting oneself into an event or buying some rights to it.
The harder and more vulnerable thing to do would be to have a conversation with her DILTB and say “I’d love to contribute somehow if you’re open to that. I can offer £000” but if she only wants to pay for certain things like the dresses, I think that makes the offer conditional, and that’s only ok if she can be clear on that and then the bride can make that call with that knowledge. But I think that would be awkward.
my advice without any expectation and only as you’ve asked would be this:
in difficult situations such as this, guests have no real say on anything, neither should they. That can feel awful and upsetting. The option you do have open to you is to release anger and resentment, and focus on what do want, and what can control (that’s yourself) . You can make the stretch and hold yourselves with warmth and grace, and then put your own wants aside and attend. I imagine your SD’s anger and protest at not going feels good in the moment- in the face of his wife’s upset. like he’s making an affirmative stance and showing loyalty. But I’ll bet what would be much better for your mum would be for him to pull himself up, hear and validate her understandably hurt feelings, and promise her they’ll go and they’ll enjoy themselves. HE’LL be by her side, supporting her and having fun with whoever is there. Staying in that victimy position is good for no one. If you want to explore other ways Brene Brown is great at this. She’s on Netflix talking about vulnerability and connection and I love what she says.
Another quate that helps me is from Michelle Obama “when they go low, we go high” it gives me strength not to lean into resentment.
I hope you’ve gained some support through reaching out. I hope you can take this opportunity to build relationships with your incoming family.