This is an issue that I dealt with too with my 5yo son. For the first couple of years I felt very hurt that my family didnt want ME around but wanted to continue a relationship with my son. I took it personal and thought 'the hell with them...he is a part of me and if they dont accept me then they cant have a relationship with him either'. I've since changed my opinion.
I sort of feel though that by saying they can't see my daughter this makes me as bad as them and I don't want to deprive her of her family.
That sums up my feelings now. I feel like anyone who allows religion to keep a child from their family is wrong...even if it is the NON JW allowing that to happen.
I decided I will not be the one responsible for making the decision to keep my son from having a family. If that decision is to be made it will be made by them and he will be able to see that it is them. My only requirement is one that has now been made crystal clear to them, they are not to try to enforce their beliefs on my son. Before my mother and I had that discussion though, they tried one time to do that and my son challenged them with multiple questions making them uncomfortable. Now,at the moment anyway, it isnt an issue and he is able to spend time with his family without the jw issue being more than just an annoyance.
My family has also weakened in their resolve to shun me fully also during these last few years. I think that is because they can see that regardless of their actions my life goes on just the same..if fact it continues to get better and I continue to be happier. I spend a little more time around them than I used to and an outsider wouldnt know there was any issue between us with the exception of a couple of hold outs who refuse to acknowledge my presence.
Bottom line with my child is that we have made it to the point that if they have a jw belief keeping them from doing something with him or me I insist that they are the ones who explain it to him. Once when we were leaving my parents house to go out to lunch my son asked if his auntie and grandmom could go with us..something they would never do normally but I told him he would have to ask them. He did and they did and we had a nice lunch. I hadnt had lunch with anyone in my family in many years.