OK, so here is the real question, I have no ability to take the kids away while she feels that "loneliness" us DBers know all too well. I could try a trip but now summer is over and as much as I wanted to do it, I would have had to "force" it on one or all of my kids if my W wasnt going which would have been counterproductive.
What is your question? Should you try to isolate W for a bit?
I'm not sure what your question was either. Have you ever tried to tell w that you know how hard she works with the kids and you'd like to give her a weekend off? You could take the kids away for the weekend and give her a chance to be alone (and hopefully, miss you). Just a suggestion, which you may have tried already.