I hope she comes back to you soon. I've had many cats throughout my life, and the only thing one can say for certain is there is no predicting what a cat will do.

Outdoor cats, especially, can be tempted off by many many distractions. I had a boy kitty who took off for two weeks, then mysteriously came back home, with a small injury; but otherwise, was fine. He went on to live a good, long life.

I have a girl kitty who, when new to us, ran away for one night, then made her way back to our shed. She has been a very good girl (now an indoor cat, exclusively) ever since.

I know the pain of a beloved cat going missing. I hope she returns soon.