My cousin and his wife tried to conceive for a couple of years, eventually being diagnosed with unknown fertility issues. She wants a baby, doesn't matter whether it's hers or not, but he only wants his own kids. She has refused IVF and I feel like he has been railroaded into adoption. He definitely wants to become a father and he would be an awesome dad by whatever means that happens, but he was so upset that she wouldn't consider IVF. He's said yes to adoption because he doesn't want her to leave him (she wants a baby more than a husband - husband was just step one to getting baby). I know he will be awesome at it but it's bound to take its toll. He's been doing lots of research into parenting traumatised children and he wants to do his best, but I feel like they shouldn't be adopting for the aforementioned reasons. I think it could take its toll further down the line. He's also told me things like "I have to agree with her even when I don't because she's my wife and I promised that when we got married." That seems really odd to me because no one agrees with each other just because they're partners - right?
Their marriage has been affecting our family relationships as I do find her quite controlling. She has also said to me that cousins don't really count as proper family so I should stop depending on him. He's always been my best friend, I'm not going to stop leaning on him when I need - we're always both there for each other.
Are these thoughts unreasonable?