Good question, and I have asked a similar question of my friends and family. It has been nine monts to the day of bomb drop, and 6.5 months of separation. As I plan to file shortly (do not want to but feel I have little choice), I guess I too will simply ask my WAW in due time. In my case I have had to do everything to get my house sold. She did help clean, but I am talking about getting the windows, plumber, electrician, carpets cleaned, real estate agent etc...
Me: 48 Ex-W: 45 M: Nov '96, together since Oct 93 Bomb: on 10-yr anni - Nov '06 OM Separated: mid-Feb '07 Divorced mid-July '08 One daughter - 28 XW living w/OM