Lately on reddit I've been coming across stories of men or women talking about going no contact with their parents, siblings or any other family members and if they have a spouse, their spouse would try to make them make peace with their estranged family member.
The most memorable story was when a would be wife invited her future husband's estranged mother and the man was furious and they ended the engagement.
And overall, when some men and women marry somebody, they feel entitled to know about their partners childhood and past and want to know about their personal family manners and disputes or want to know what's my relationship is like with a family member.
I have a huge family and I got a good relationship with most of them but I got a few cousins that I've haven't talked to for many years because of major fallouts. My wife knows that I have cousins I don't talk. She asked me why I haven't talk to them and why I seem indifferent towards them on the rare times that I do see them at family gatherings and why I never bothered to introduce her to them but I told her firmly to stay out of it and stop asking dumb questions.
Why can't most people stay out of their spouse's family affairs? Mind your business. It's really not hard to do.