I had a houdini cat like yours once. I was away one night and at 2am I got a call from my nebogihur telling me that my cat is hiding behind her sofa after a fierce fight with her own cat. He had escaped through an open balcony window. He was very old back then and a bit of a wuss, so I never thought he'd do such a thing! I'm so happy you found your cat safe and sound. I hope she now has fulfilled her curiosity and stays home from now on!