Do you have an opinion on what I asked about MIL in that same post?
In your specific case, no, since you know it much better than I do. In general blood is almost always thicker than water, I have seen it go both ways, in my own case my in laws are the source of the problems IMHO, I always had a good relationship with them, for 25 years, then when I was no longer needed(by wife) they no longer needed me either. I have seen other long term marriages where their is still a good relationship with the in-laws, although the couple is divorced.
So I guess I would say keep an open mind, and do what works.