My wife didn't mind riding on the bike with me, but she always asked about riding and has had several bikes over the years. She doesn't ride all the time, but she has done more than I ever thought she would.
When I started doing desert trips, I figured she would want a quad but she showed no interest in four wheels.
I sort of figured she would want a cruiser/Harley for a street bike but she seems to like a bit sportier machine. Her current bike is a Yamaha FZ6 (You might have your lady check them out as well, a good all around machine).
Anyway, it's always nice to have your best friend interested in the some of the same things as you are.