It is hard to say. Some people (most probably) will stick by their own child in a separation, even if they think that child is wrong.
Also, it might not have anything to do with you at all. Some families just handle things badly. My xah's family left/leaves everything unsaid - to me and each other. One sister keeps everyone informed (and she is the one that calls me from time to time now that he is there) otherwise I'm sure the rest wouldn't even know we were divorced. The other sister sends the kids things from time to time and calls to let me know a box is coming (and has never said one word about the divorce) and the other two brothers and their families have dropped off the face of the earth. I haven't heard one word and neither have the kids. No cards at the holidays or anything. I honestly don't think it is me. I think they are all just that way. His mother died shortly after we separated but before we divorced. She didn't know and I can't imagine how she'd have reacted.