J.S.
Hi,
This may come across as harsh and I don't mean it to be as such. I am on the other side of your fence and I'd like to share my story to give some balance.
I do not allow my mother to see my children and haven't for almost 2 yrs now. She will not be allowed to see them or speak to them until they are of legal adult age and make the choice to see/talk to her themselves. (they are 13 and 11) At this point I know my mother is sad but protecting my family is my priority.
My mother made many errors of interfering with my family over the years - being very inappropriate with me in front of my kids, being inappropriate with them, causing many more problems with my husband and I when we separated that hurt the children deeply. The list goes on and on. Two years ago she made the grave error of threatening to take them away from us (my ex husband and I) by any legal means possible if we chose to homeschool them - something we were comfy with but she felt was wrong - therefore we were wrong and unfit parents (yes she said that to me). That was my last straw. There are many more things that go into this story that led to my final decision to put her completely out of our lives at least for many years - but that is the basic story.
While I feel for your situation no one here knows the full extent and all sides of your story. We don't know what your personality is, if you were a meddling grandparent or if your ex is really one of those jerks who can con everyone into believing they are God's gift.
I don't know what to tell you about feeling down about it all. I truly believe that in situations like this there is a reason for the breakdown in communication and it comes from all sides involved. Perhaps talking with your son about joint counseling would help to break down a wall that was put up 10 yrs ago. You won't be able to establish with the grandchild unless you establish a relationship with your son. You have healing with your son that needs to occur first... You might even suggest to your sisters the same thing - counseling to rebuild that relationship.
I always say that if someone doesn't want you around, look to yourself and see if their reasons don't actually have some validity to them. I had to give myself a HARD look many years ago when I was being told things about myself that I didn't want to hear. When I took a good close look and was honest with myself - some, not all, but some of what was being said was true. And I tell you what - that really SUCKED! :) It takes a lot of strength to look at ourselves honestly and acknowledge that maybe we do have some character flaws that could use some fixing... I dearly wish my mother would acknowledge this for herself - but she won't. She is a victim, has always been a victim and is a fabulous martyr. If someone doesn't agree with her way of doing things THEY are WRONG - because of course her way is always the right way. And if they don't take her advice on how to do something she takes it personally as if they are telling her she is wrong and stupid and not simply making a choice that works for them. I love her very much, but cannot allow her to threaten my family the way she did. And so, she has no contact.
I wish you luck on this...I know this must be a tough situation for you. I feel for my mother too. We all make our beds and have to lie in them - and if we are lucky, we can figure a way to remake them so we have our families by our sides...snuggling in warm and cozy. :)
Much luck to you...
Warmly,
J