Good Night, Katie! What a frightening experience! I think this may be one of the hardest parts. You can't explain to them what they did was wrong and why.....there is no understanding or remorse. And I can't show any excitement either, that just agitates him. I, ever so calmly, through gritted teeth, tell him that "that is NOT ALLOWED. Grabbing the steering wheel is NOT ALLOWED. Can we agree on that?" So far, that works.
I thought about having him sit in the backseat, but I remembered your saying something earlier about your Darling Glen opening his door (didn't know it was on the freeway, or on the way to a funeral! Geeze, or with his son at the wheel!) and I don't have child locks back there.
I wonder what's next....