I'm just sad. My brother has struggled over last year with rounds of tests etc to try and figure the cause of his infertility. He had surely unpleasant surgery and is off on short-term disability (he's in construction) for 2wks and to no avail. The couldn't fix anything and didn't find any genetic material. Now he and SIL have to decide whether they have the resources financial and emotional to find a donor or try adoption. My heart just aches for them. And I hope it isn't selfish to sort of grieve that I may very well not be an aunt and N might not have any cousins. This is seriously making me reconsider my one and done plan.
Re: chances of N having cousins down to 0.00001%
I'm sorry that your brother and his wife are having such difficulty. I don't think what you're feeling is selfish either. You definitely have a right to feel that way.
That's gotta be really tough on them. I hope they can come to a decision that makes them happy regarding adoption/donation.
I don't think it's selfish at all to grieve not being an aunt.
Big hugs!