Sorry your ex is pushing things so far Natsku. Sounds like you and OH are well prepared though.
Bloody hell dung. That sentence about your ex's DF, I could have written most of that. No contact with his sibling. Didn't like his wife's sibling, so they were ignored. Her other sibling was tolerated. When that sibling died, they didn't agree with how her widowed husband (in his 80s) was conducting himself, so they made him feel so bad he stopped contacting them.
My ex genuinely thought if his parents felt this way, then it was ok that they'd ostracised an old man they'd known for over 50 years. He really couldn't see it. I found that unnerving.
mysinkingheart : you say your ex distrusted your family's kindness. I have never thought of it like that, distrust, but that's my ex completely. He used to wonder why I would do a favour for somebody I didn't know that well, or take time with someone where he couldn't see the point. I never thought of him as unkind, but altruism, just doing something because it seemed the right thing, I don't think he "got" that. But then his dad only did/does things that reflect well upon him. He's not a lift giver, or a lender, or someone you'd call at 2 am. He likes to run things, be in charge, but it's all reflected glory.