K.G.
WOW! Sounds just like me and my sisters! lol
I have 3 of them and until recent years, they wanted nothing to do with me. Now 2 of them talk to me all the time and we spend time together and my kids go to their houses pretty often.
The other sister however, well, I could care less if I ever see her. She's very condescending. I recently found out that I am going to be a grandma, and when I told her she just looked down ehr nose at me and said "yeah, I heard", kind of rolled her eyes and said nothing more.
So I decided that if she doesn't like it... too bad for her! I am going to enjoy it myself.
Anyway, try to talk to the sister you are most close to. Let her know how you are feeling. It might turn out that she feels the same way. I had no idea that one of my sisters felt like I do. We are now really close.
Sometimes you just have to take that step.
If things don't get resolved, then you may have to walk away, but at least try talking to one or all of them (individually) and see if you can resolve this.
As for your mom... well, she's a mom. She needs to think the family is in sync with each other. (Mine is the same way.... she can't understand why I refuse to talk to 2 of her sons---both are child molestors). She thinks we should all be one big happy family... and that's never going to happen. But, she's in her 70s so I just tell her that she just has to accept that it won't happen and she is welcome to share our lives as long as she doesn't try to force the other 2 on us. We have come to an agreement over it. I know it hurts her, but she also knows that I refuse to let myself or my family be hurt ever again by those two people.
Good luck. I really hope you can find a common ground with your sisters..... it took me a long time to do that, but I am really glad I did.
BTW, my sisters are all 47 yrs old and older... I am 37. I am also the only one who didn't have grandchildren till now, mine is coming in May.