Figured it wouldn't be yours.
If you happened find a gun on your person (fancy that) in a time of need, what would happen if you used it in a justified manner since you're not legally allowed one?
I spoke to a cop about this. It would certainly complicate matters to some degree if it came down to it at a subsequent court hearing but the general jist was keep the gun in the house and if someone breaks in, feel free to take them out. If we were out in the car in a dodgy area and someone tried to carjack us, if my wife had a gun on her and was unable to use it but I was, then I'd be able to use it.
It would take a lot of explaining and would probably result in a lot of trouble to begin with but better off in trouble than dead.