I think thats a good plan. If you did record and play back, the cognitive dissonance he’d suffer would be catastrophic. To behave as you described, you have to naturally rewrite history, which means this is an entrenched learned behaviour. Professionals have a hard time helping people deprogramme and that’s with the persons cooperation and desire to be deprogrammed, it’s practically impossible for spouses, etc. Not without the support and his willingness to see the behaviour and change it and you don’t have that willing spouse. She’s dead to you and he’ll just have to accept it.