CVA- You are such a good dad. I know that you will find a way to stay connected with all of your kids.
I remember you writing a long way back about wanting to do 1-on-1 activities with each child. Since your D seems to be closed off, maybe you should plan something in the next few days for just her and you.
Had your W said anything to the kids about the D or did they hear about it from you first? I'm astonished that she wouldn't have told you that she was going to file.
You wrote:" Oh god, what I must have done in our marriage for a woman to do this." Cva- Don't take this all upon yourself. It takes 2- it's obvious that you were not the sole source of the problems in the marriage.