I don't know how old your wife is, but my wife was 40 years old when she decided to drop the bomb in December 2008.
I was just about to start a ten month period of no contract work. This, I believe has been a contributory factor towards our divorce.
I believe my wife evaluated our relationship at that point and probably felt I could not provide the financial security she wanted. I, like you would have lived anywhere, but for the women out there please do not think I am making assumptions here, and without trying to be generalistic or chauvanistic I believe women want to feel as though they are with somebody who will provide for them and their family on a consistent basis as historically, men have been the major bread winners.
It seems a poor 'excuse' but I was interested to see the poster who said that WAW's are hugely concerned about their spouses income. It should not make a difference but clearly it does.
Bomb dropped: 19/12/08 Me:48 WAW:41 D:10 S:6 Married: 15 years