One of my main worries is about the distance between where I live and where she wants to move (13 hour, $1000 flight). I know that by state law, I could probably get a court order restricting her to within 50 miles of me. But I don't think I want to do that. I think it would only build resentment and probably be worse for her and my son.
I know you love your wife and want to take the high road, but for future sanity and being a good father you must restrict her from moving more than 50 miles. You owe it to your son. Yes it will piss her off and give her another excuse why she thinks it's best to leave you, but that is her flaw. I'm sorry to say that there will be a good chance that you guys won't get back together. You have family where you are and you have a good job. I know you think in your wives eyes that she'll see you as being uncontolling, giving, and a good person (in the hopes of finding you attractive again), but frankly she won't. This is the mind of a WAW or WAH. They are in a fog, you are not. There is no doubt that she is seeing this guy and usually that is what creates a WAW or WAH.