Why would you write on Facebook about people who bug you?
Well anyways, if she's always like that, maybe you shouldn't change her or you, but just break the relationship, or bring it to the least level possible. So, just the formal conversations, because it's obvious that you can't be close. It's the way that woman is so you shouldn't try to change her now, there's for sure a reason she's acting like a bad person and sometimes, if you don't get along with someone, you should probably just let it go. It's nice from you that you still want her in your life after all of that, but sometimes we can't sort things out and we need to let go. Now I'm not saying you should act as she doesn't exist- help her if she needs it, send her money, whatever, but you don't need to be too close to her if she hurts people, especially if she says mean things about a baby she has never even seen!