Hi Cloverleaf! I just wanted to chime in on the topic of mixed food plan households. I am now finally 2 months into McDougall being completely compliant (it was on again, off again for me for many years, and I realize 2 months is only my beginning - but it's the longest I have ever managed to stay fully compliant!) My husband is a completely compliant low carb eater, so we are litterally on opposite food plans with the exception of non-starchy veg, which of course, takes with some kind of fat and I take with no added fat!
To say this has been challenging to adapt to is an understatement!
I do all of the grocery shopping, all of the food prep, and most of the cooking (everything except what is cooked on the grill). He brings home the money and deals with the stress of running his own business, so it's a fair arrangement in my book. For me, the best way to keep up with it all is to keep both of our meals really simple. And a LOT of his animal food items are GRILLED, so he does that part. I batch cook a lot of things for both of us. (i.e. potatoe, oats, soups for me, salads in individual serving containers for him, clean and cut the vegetables ahead of time, etc.) I order my groceries on line and then pick them up at the store which saves me time, and also saves me from various temptations inside the stores. I rely a lot on frozen vegetables (both of us) and fruits (me). I love Jeff Novick's SNAP meal templates. Nobody will ever accuse me (or husband) of being a gourmet chef, but we both get fed and the farther we both get away from hard core pleasure trap foods (sweets, baked goods, processed junk food, that sort of thing) the more OK we both get with really simple meals. Of course I hope that someday he will come around to eating the way I do now. But trying to push him into it will definitely not work! So I try to find ways of simplifying things as much as possible.
I have no idea if any of that is helpful in your situation. Please know you are definitely not alone with the challenges of a mixed food household / maarriage! Don't give up - you can find a way to make it work for your situation.