update:
I sent an invitation to a family party to all three; my sister, my 18 year old niece and my 25 year old niece to all of their homes. My 18 year old niece lives with her father since my sister and she can't seem to live together peacefully. I haven't heard back from my nieces yet. My nieces don't feel comfortable with my parents (their grandparents) because my parents feel they should be more respectful towards their mother and have told them such so now my nieces feel like they are doing something wrong and would probably not want to spend time in my parents company who will also be at the party.
My sister responded that she would not come to the party. She seems to feel that if her daughters can't go with her that she can't bear to be ostrasized at family events which she felt happened at Thanksgiving and Christmas. Easter was a bust since I invited my sister to come and extend the invitation to her daughters and none of them ended up coming..
I offered to go to a therapist with her and she said that she couldn't go until after her divorce is final. That seems to be an excuse...or is that part of paranoid behavior?
That is where we stand.