S.B.
No offense, but I'm confused and having trouble following you.
What does seem clear, sorry if I'm wrong, is that your husband's dad is coming to visit.
Is there any way you can just enjoy that visit and let all the rest slide?
I'm not sure what any of the rest of it has to do with anything.
Sorry if I'm missing something.
Why are you comparing your ex and his family with your husband and his family?
It may be a new and completely happy thing.
I know it's become common and almost customary to have an issue with in-laws but maybe you are worrying about nothing.
Scrape the rest of the issues away and you might be able to have a nice visit.
No offense.
Just my opinion.