I'll be wearing my boots with boot socks (just below the knee), thermal underwear(bottoms), and windbreaker pants under a pair of jeans. On top, I'll be wearing thermal underwear, long-sleeve shirt, Ducati leather jacket, winter riding gloves with additional inserts, and a gaitor-neck on my head and neck under the full face helmet. Hopefully that'll be enough to stay at least a tiny bit warm.
you'll probably need one more layer on your upperbody in my experience. the rest sounds ok. are your boots waterproof? nonwaterproof let a lot of cold air through.
i understand you desire to do this, but i really do recommend against the wife following. you should send her on her way. you will distract each other