Wheat, you're gonna have to work it out with the wife on your own. But for what it's worth, I've always taken my kids on the motorcycle. Once they are big enough to reach the pegs, and wear gear, and if they want to, then they can go for a ride.
My son and I did a 500-mile day to watch a WERA race. Worth the trip. We had a great time. He was about 12 at the time.
One of my daughters used to ride with me, the other had no interest. The one that would ride now has her own machine, an '06 Kawasaki Ninja 650R, the new vertical twin. Nice bike!
My son rides an '03 Honda 600RR. And my FJR sometimes.
I've always rode motorcycles, since before I met their mother. They've never seen me WITHOUT a motorcycle. I'm sure that has something to do with it.
But, the down side (ain't there always a down side?) is that all three are motorheads. They've always driven manual shift cars, or V8s or both. Two of the three ride bikes.
So, they inherited their mother's good looks, intelligence, and common sense. From me, they got the motorhead bug.
If your wife has a phobia about death or injury from riding motorcycles, well, you could be in for a battle. You have to decide if it's one you want to fight. Lots of people have that same reaction. Statistics, logic, gear, training, maturity, all of these can be shut out by some people that fear bikes. You should talk it over with her. Good luck. And don't get pissed off at her. Phobias can be tough.
I've gone 160 mph on a motorcycle, but I'll be damned if I'll get in a boat. I'm afraid of water. Would that be hydrophobia?