My W would say stuff like "You'll be great for your next wife" all the time - it's jealousy speaking. They don't want the fighting, but don't want another woman to have you, especially once you start acting nice and looking good.

It is VERY important that you continue honestly answer that you're doing this for you. Don't go to church to get her back; how offensive to use God in that manner. Do it because you want to be the best you!