If 당신 let your cat out there is a good chance she could dissapear. It happens, though female 고양이 do tend to stay closer to 집 than males. Most house cats, especialy if they're spoiled will behave 더 많이 dependant on human service than to rely on their instincts and hunt. They will hunt out doors, but in my experience they would drop the kill for a bowl of fresh canned cat food.
If there are a lot of other 고양이 around, strays and such there's a good chance she'll get into fights, end up abused 또는 pregnant (if not spade). If she is in heat she will likely stay out untill through mating, just keep an eye out if 당신 notice her missing for a 일 또는 two, 더 많이 than three 또는 four I'd check the local animal shelter in case anyone happened to pick her up assuming its a stray.