If she tells you that again, say "Well, this is your mess -- you get to clean it up," and/or "You know what needs to be done; I'm not going to tell you." The idea is to NOT RESCUE THEM from their own decision-making that needs to take place, while simultaneously indicating that there are some things that would need to be addressed.
Someone on AFWAW's thread also suggested one I liked: "I'm afraid it's not that simple anymore," indicating that HE -- the LBS -- now has his OWN decisions to make, and that the walkaway wife doesn't control the agenda anymore! I liked that one.
