DK - I've stood where you are so I know where your coming from. I'm not much of an advice giver and as I said each person has to just go thru it I think. But I'm gonna have to say be cautious here - I wouldnt believe much of what either one tells you, I really wouldnt.
She's stooped to the desperate level of calling her BF's WIFE for advice. If she's done with your H then she wouldnt bother with either one of you, but she's hanging on and is using what she can to her advantage. I went thru the exact same thing in my sitch. H wanting to explain to me and her wanting to know this and at the end of it I get slammed with my 2nd Dday.
Not that I'm saying this is going to happen in your sitch, I just dont want to see you go thru what I did because I know how easy it is to get caught up in it all. As bitter as I am I can still get caught off guard like today H threw me a compliment.