I am fearful of injecting an issue with any real gravity to it until she feels safe with her emotions with me.
Leading her down this path with the IVF when you don't want to do it with a divorce pending, then backing out of it at the last minute is NOT going to make her feel safe with her emotions with you. I'm fearful you're going to put all this work into getting the squirrel to eat from your hand, then try to grab it by the throat and run it away forever.