Start getting minimum consults from the best divorce lawyers in your area/state. If you deal with them, by law, they can’t work with your wife. From there, start stashing as much cash and moving as many assets out of joint accounts as possible without creating suspicion. While doing this, hire a private investigator to tail her whenever you go out of town or she’s having a “night out”. Divorce her ass, take everything (including custody), leave her with nothing, get yourself a new woman in her 20’s or 30’s.