Hey FIB, just checking in to say hi! I think the sooner this is over for you,the better off you'll be. Right now, she is not a worthy person - not worthy of your time or energy.
Keep the focus on the kids. Be their voice of reason, their beacon of light. Show by example as I know you do and love them fiercely. Hang in there. And remember there are women in the world who appreciate a man with morals who love their children and want what is best for them. Sorry your wife isnt one of them.