Heh, cats....
She has become so conditioned that she has no care to BE outside, sure... Do you have electronic/stimulus toys to keep their 'hunting instinct' alive and well? (Wind-up mice, laser-pointers, etc...)
Strange that this would have happened to his cat just now, I have been reading 'Pet Sematary' for the past few nights.... w-e-i-r-d....
(Churchill, the old cat, gets smashed in the road and freezes to the earth...)
Ughhh...sickening topic, really...