In the mean time you should being contingency plans in case she does actually walk out. Your money (let her keep hers) should start going into separate, hidden accounts. If you live near an international border, you can stash money in a foreign account in most cases with a minimum of hassle. Canadian and Mexican banks offer US currency denominated savings and investment accounts.
You don't have kids, so you're definitely fortunate there. Imagine the damage control you'd have to do if your kids heard from their mom and grandma that "we're going to put your dad in the homeless shelter... we'll have him deported to Canada... you'll never see him again so you need to say good bye" etc.
That message was given at the end of Jan, and I'm still here, trying to assure everyone that I ain't going anywhere and that if I do they will all have the option of moving along with me to someplace better.
Move the good stuff you don't want used/stolen/damaged by the next fella into a storage locker if you can. High priced electronics, expensive firearms, pricey tools in your garage, etc.
Start checking out efficiency/studio/1br apts now, in case the s--- hits the fan at some point. Unless you're very wealthy, you'll have a rough time affording a hotel for longer than a week.
M:40 W:40 2 teenagers ILYBNILWY: 09 January 2010 soon to be walking away my situation