get yourself a really old sport bike- then upgrade the suspension and leave the rest alone. it still has the stance, thrills and handling of a sport bike, but at 1/4 the speed. show the specs to your wife, that its less HP than your current ride, and handles better- so actually its safer. tell her its vintage, which it is, and not like even in the same world of the new sport bikes. all very true.
my fz600 looks like a race bike, sounds like a race bike, and pretty much was a race bike back in 1986! but at ~50hp, you have work a little bit to get in trouble.
morini 3.5 strada & sport, r75/6, duc 900sd (project)