@HaleyJamesScott
So those of you who'd make your OH's choose between you and the donor "child" - do you just not really care of the effect it could have on a person being rejected like that?
I wouldn't make him choose. The complications this situation bring of an outside family member with a bit of contact, a relationship, my children is exactly why I didn't marry a man with children.
If he "chose" me and our children, I wouldn't be able to respect him for having a child or children out there whose life he is not a part of. That's not the character of the man I married.
If he "chose" you and to have a relationship, it would impact me and my family. Our exclusive unit would no longer exist, I have acquired a stepchild. I do not want a blended family. Your relationship may be great or not so great but it's drama I did not sign up for.
We would be at an impasse. The only logical thing would be to separate as I honestly wouldn't be happy either way. That has nothing to do with the child. Their father or donor should not reject them, him doing that wouldn't sit right with me.
If he had just told me he had done this when we met. When I considered the risk that this might be a possibility, I would never have married him. I am consistent on that even if it were a child from a previous relationship. My personal experiences have coloured my view of blended family situations and I want no part of it.