Hopefully, he will be experienced enough to catch on pretty fast as to what's going on with her. I'm glad it's not IC b/c I think she would get somebody to agree with her leaving.
In your past discussions with her, have you brought up about how this is like an addiction and that's why she wants him back--even knowing he's not what she needs?
I was just wondering. I remember when my H talked to me about it and I turned a deaf ear b/c I all that mattered was my next "fix".
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!