I have my doubts that your suggestion will work because it implies there is something wrong with her... So I will let this whole matter lie for a little while and ponder it some…
I think you're gonna have to figure out a really good way to present the idea.....You've said your W admits to some possible personality disorder characteristics, etc, but you would still want her to feel supported by you (via any suggestion you may make) not threatened. If you two aren't on the best of terms, she would seriously doubt your motivations, which will defeat your purpose and interfere with her getting the help she may need. Think on it...
"Happiness is a butterfly, which, when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you."
