Don't listen to her cheesyt. She hasn't filed for D yet, which in and of itself says something. Even if she does, you've come a long way and continue to be an amazing person. Your W truly is the "fool" of which we all speak, for not seeing this wonderful person she is leaving.
I completely get that you're scared right now. Even with the brutal nature of my W's feelings towards me, I still recognize that I've got some fear beneath the surface. Fear of how my D will grow up in a split household, fear of how my W's life will end up, fear of how I will do alone if it comes to that. I know that fear, I think we all do. You aren't alone in it.
I'd be hesitant to assume your W is happy with SOW. She may or may not be. Not something you can control, nor should you dwell on it. Nothing but unhealthy stuff down that path. I do like your response to your W, but I'd cut it off there if she does respond. Don't respond back to it. Unsure of when the last time you talked to her was, but it's possible it could be temp checking. Who knows. Regardless, it's probably better for you not to get pulled into a R talk, as you know where that'll go.
I know that you'll be ok cheesy. You have some many positive things in your life. So many people that care about you. If your W is too blind to see how awesome you are, then she doesn't deserve having you in her life anyway. You are right, you will be ok and you will be happy again cheesy. Stay strong and true to yourself. You rock!
Me39 M11 : T13 D9 BD 5/31/16 In House S until 6/21/17 Divorced 10/5/18