Hey guys...I know what each of you are feeling. I've been there. My M has been in shambles for 3 years. If I had found this place back then; maybe I'd be in a different position.
True detachment, IMO, can only come when YOU GAL. you have to occupy your life so that you are concerned with your own activites and you dont have time to concern yourself with hers. Only then can you let go.
In my sitch, my W needed to grow up and learn how to live on her own. She reached a point where she felt she had no identity; so she went searching. Now that doesn't excuse affairs; that's why it's important to establish boundaries and financial independence.