It does sound like that reality is setting in with W. Apparently, things (seperation, etc.) are not going as she envisioned. Such is the way of successful DB'ing.
My observation is that she is in a precarious state: fence sitting, as you put it. Be kind, gentle, and open (as you have been) as maybe the sun will shine on your M. I think you should figure out what you want (D, M, R - whatever) and let her know before the sitch changes. She is in a state of limbo, it would appear, and nobody enjoys that. Set a goal and work yer butt off - don't be sad! I will stay tuned and see how things unfold.
Best o'luck, --Chris
Me: 40 She: 31 S: 5 D: 3 Married: 8 years (05 DEC 99) Blow-up: 02 JUN 07 Piecing (More like Ostriching): 22 FEB 08