I've got to agree with kml on this one. Gently guide your husband or he could end up short stick. My impression is that this walking cancer (Monster) might still have a card up her sleeve, which doesn't need to be real, just implied. We are a society that buys into the poor, poor ____ story.
It's time to make that Monster a non-factor. It sounds like H has grown extemely tired of her and is now focused on you. Great, quite dragging in the dead dog, and focus on your R. You both seem committed to it, so enjoy each other and build. If your husband has to keep proving himself to you by slamming Monster, this will cause ongoing attention to her, which is what you don't want. Right?