QS, you are doing well, your wife's just not sure how to read your behaviour so she's just calling it crazy...
Avoid arguments and conflict as much as you can.. your wife just wants reason to walk out now and if you fight with her its going to give her that reason... speak up for yourself if she's abusive, but avoid getting sucked into a baited argument...
Your wife's looking for support for her actions now... this is when a good exposure plan will counteract that effort... the more people that won't respond to her talking about divorce the more discouraging the idea will be...