If she quit claimed the deed to the husband she has no ownership in the property therefore she was not entitled to the ROR. And if they are no longer married then she should also have no dower rights in the property, but that's a matter to be researched in your state law.
She had no legal capacity to sign the mortgage so basically her signature is just taking up space on the mortgage. How it could affect your filing is again a matter of state law. I honestly don't think it will be that big of an issue. If you can't reach your attorney contact your recorder and see if they can help you.
Or if it would put you more at ease file an amended mortgage. That would be what I would advise our people to do if such an situation came up here.
The opinions expressed are mine and they are not to be taken as legal advice.