I'd see if there was any way to readjust our household finances first. Find out if she wants to get rid of it becuase she doesn't like it or because it really is a money issue. I'd be more likely to give up cable TV or get a cheaper car, than lose the Busa. If we can't afford it, and can't come up with a way to afford it, then I suppose I'd have to let the Busa go.
Of course if it isn't a money reason. If it is more like money is being used as an excuss because she just doesn't like the bike. Then I'm a lot more likely to keep it.