Do not fight with her, per sandi's list. Get away if she starts it. Just say STOP, when she starts to blame or turn the tables on you. If she wants to talk it needs to be about a MC, and transparency plan, not rehashing the old hurts.
You are strong and confident, you are having the right attitude.
Her attitude is a lot like my wife, she continues to bring up the bad from the past non-stop. You have owned that, apologized, asked for forgiveness, and can't change the past only the future.
Keep us posted, we all are praying for you.