You are human and yes, you've had it about up to your neck w/your xw's comments and behavior, Sure, you stated what was exactly on your mind and guess what....it went right over her head. You can state how you feel all day long until the cows come home, but until she's at a place whereby she will action be rational and can actually hear what you are saying, you are speaking to someone who is deaf to all that is around her...except herself and what she wants. Again, I do understand how you feel and you've been so patient throughout all of this.
As for that comments about waiting until the girls are 30, she is as nutty as a fruit cake. She's just lashing out and saying whatever comes to mind. She is no where near acknowledging what she's done or facing the consequences of her actions. It's still all about her, her feelings and what she wants. She's still very selfish and until she starts to grow up, she'll remain that way. Remember...you can't rationalize w/an irrational person. You can't help someone who doesn't want to be helped. They need to hit bottom very, very hard and then they have to decide whether to stay there or want to rise to the top and live life to the fullest.
Irish, keep your focus on you and your girls. I know that you know that you can't help their mother...but you can be there to help your girls as they grow up into beautiful young ladies. Please come here to vent and let that anger out. Venting to your xw isn't going to wake her up and she turns a deaf ear to all you have to say.
Hang in there! We are here for you.
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.