Well, it can only be like that when both parents have a reason to respect each other. Your parents obviously learned how to co-parent, and they have respect for one another. Their D clearly wasn't hostile. Or they've learned to move past it.
That ^^^ doesn't just happen. It occurs when both parties are responsible and put the lives they've created FIRST ... above their own.
T, YOU put your children's lives above yours. That has been clear as a bell since the first post I saw of yours years ago.
Your H?
Pffft. He wouldn't know how to put someone's needs ahead of his own if his life depended on it.
So if he thinks you and he will "naturally" have the kind of relationship that your parents have, I'd evil-laugh in his face.
Not even close.
He's got a lot to learn.
No day like today to start helping Life teach him!
M: 40 H: 44 Married 14 years S11 & D6; D20 & D19 from previous M 2BDs/PAs, 8 years apart Piecing: April 2014