AIBU to not want a postnup?

[parentandpartner]

DP's parents want me to sign a postnup. DP wants it too. I don't want to sign but think I have no alternative.

I feel that DP's parents are trying to bully me (through coercive control of DP) into something I do not want to do and I fear them having oversight of an area of our lives that feels like it should be private between DP and myself.

AIBU not to sign?

Do I (1) sign to get them off my back and ensure my partner and our children are protected financially in the future and accept it's just a piece of paper and hopefully will never be needed or (2) leave the marriage to get free of the controlling nature of DP's family (and similarly ensure their financial security) or (3) continue to refuse to sign and as such mean my DP and our children are cut off?

(2) and (3) feel unthinkable so my question is: AIBU and do I just have to sign and try and move on with our lives? It's just money after all. And I was the wealthy one I can imagine feeling a desire to protect what I had earned.

For me it is about the principle (not giving in to bullies) and the feeling (it feels like abuse) - I don't mind about the money and would not want it if we split as I would want nothing to do with DP's family. But the consequences of not signing are major for DP and our children.

So many people on here who don't seem to understand how these agreements work or read previous posts . Both parties MUST by law consult with a solicitor and have the paperwork stamped by that solicitor to prove they have taken advice . It won't go through without.

thank you for your detailed response. I’d read your initial post about affairs etc as ‘facts’ but see they are just guesses, which is fair enough especially as you had said it was your interpretation

Im reading it as there being a lot less drama and that it’s more that the parents won’t to protect the money just in case the couple split, which considering the couple have gone through a rocky patch is fair enough. The parents have not said anything about wanting to secure the couple home, the OP was thinking that they might.