I think I would sit on that note for a bit. It's not a simple if I do this, will you do that (like Sotto mentioned). You aren't bargaining here.
When they know that you mean business and are prepared to move out and get on w/your life, many of them will panic and try to bargain w/you...but....once they've got you back on the hook, it isn't long before they are back to their old behaviors.
When the time comes to respond to her, you may want to consider saying "W, I need some time to myself to think about this situation and make the right decision when it comes to my family. I will let you know when I have figured things out...until then, I need my own space." You can always change the wording or you don't have to use it at all...but she's going to continue coming at you for a while.
Gordie, she's not baked and she'll be right back at the behaviors in no time if you waffle and stay. I would continue moving forward, get your own place and enjoy the peace and quiet, i.e., drama free, for a while. It will be your safe haven and you will discover just how much stress you've been under living under the same roof w/her and her drama.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
