yes and no.
I talk to my MIL every week. I still have alot of respect for her. She is so sweet and with my kids with my husband now. when ever she comes to the house she is so good with them and has asked me if they can call her grandma also when they were babies. She says kids can never have too many people loving them she treats all of my kids wonderful and she will say that all of my kids are her grand babies.
My one ex sil and I are still very close and talk all the time. She is wonderful! She comes and see's my oldest for his birthday and Christmas every year even though my ex cut him out of his life. She is great with my younger ones also, she treats them them as family also.
My other sil brings me all of her daughter clothes that she grows out of. That is the only time we have contact.
My other sil and both brother in laws I have no contact with at all. We don't care for each other at all and don't pretend that we do. Its a mutual decision.
My ex step fil we talk to each other when we see each other... we don't go out of our way thou.
My ex fil... nope. I have no time for him at all. I seen what he did to my ex and how bad he hurt him, I had no respect for him then or now. He knows how I feel and if I see him I don't even acknowledge him... if he says hi or something first, I will say hi then walk away.
My ex is still close and good friends with my brother. I have no problem with it.
I feel divorce is between two people that's it. It shouldn't pull in other family members or friends and make them choose one side or another. If you like the person as a person then yes you should keep that contact... if you don't like them then no I don't think you should have to go one way or another just because they are part of the ex's family.
they get treated just like you would treat any other person.