Puppy is right. At this point, what do you have to lose? You can either give up and your marriage is over or you can go down fighting and your marriage may be over, but maybe not.
You've been reading a lot on this forum. You've seen how messed up WAS's are. You've read how they want divorce or their space this minute but a half hour later that changes. They're a F'd up hot mess.
Keep fighting. No one said this was going to be easy. Read again what my WW said on multiple occasions and when I countered, she changed her tune. Don't know what our outcome will be, but we have a lot better chance now than if I would have just said "ok" to her divorce or separation demands. Don't know what your outcome will be either, but DO something. But like Pup said, don't do it in anger or from a position of weakness. Think it through and DO IT. She won't know what hit her. With your email to OMW you've taken the first step.
Hope4us
Me - 49, W 49 S22 & S18 Dday 9/4/07 W claims NC 4/7/08 8/29/09 - Divorce Busted. Lots to work through, but we're going to make it.