Addendum

I'm feeling much better today. More "centered", whatever that means! I've realized that no matter what the future holds for my relationship with our older son, he is free. My hope is that he uses this time to sort out all the vileness of the last couple of years. I want him to know it's not his fault.
I believe there is a fundamental, unchangeable, lack in D.I.L.ly's personality. I don't believe she can get "well". I don't think she will ever completely accept that there is something grossly "wrong".
So, I can wait....but not too long!