I could not have said it any better than SH. Perhaps I am too suspicious. It just seems that it is a little too convenient. She didn't appear to have any fear when she wanted to move back under her own terms. The WW feels that she must give some kind of justifiable excuse for leaving a good man. So, she comes up with something like she is afraid of him, although, nobody else has seen any behavior from her H that would cause her to be afraid of him. It's one of those things that a WW can do that makes no sense. IMHO, this comes from her mindset of wanting to make her H the bad guy, while winning approval from others for herself.
Based on what you have told us, I think you should file this under believe nothing she says.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!