Bridesmaid

This is a big nope. You have no guarantees she will turn herself around by then (and she may be offended if you say that). She probably doesn't want to be in the wedding, based on her lack of response so far. Your bridesmaids should be your closest friends who will support and lift you up, not bring you down and cause stress on your big day. I recommend not reaching out to her again.

That’s a big fat no. Why would you even consider inviting someone so unpredictable that might ruin your wedding?

Move on with your plans you had reached out I read many times. But you giving her an Automatum and if she is going thru something may have pushed her further away. I pray that it's nothing too bad and she will reach out and want to be apart of your big day. And what ever the family issues maybe that it can be worked out at a different time l. Because if she reaches out to anyone because she may feel as if she is going to be attacked by family. But I hope that all of this is limited and you and your sister can talk

I understand she's family, but I cannot figure out why you would want someone that you said has previously lied and manipulated to the point of exhaustion and who cut you and your family out, to be one of the important women by your side on a day that is supposed to be about love and be a happy day. Can you guarantee that if she said yes, that she would not cause any sort of issues on the wedding day? You gave her more than enough time, I would move on and if she eventually responds, just say, "I had to move forward in a different route, but I'd love to still have you at the wedding."