I believe you have the right perspective on this, atm...

As much as we start the physical separation period with the HOPE that they will ask to come back, or ask us to come back... the reality is, it's not that simple...

I would submit that if she is serious about it, she should have to move back in with very clear goals and commitments to the M. Not just because she doesn't like the cost of living alone... both financially and emotionally...

Keep doing what's been working... you know the drill...