She has never been known to actually chase a mouse (let alone catch one). Marzipan is too well fed for such nonsense although she has been known to spend inordinate amounts of time staring fixedly at what she still fondly hopes is a mousehole (or what might have been a mousehole in the distant past).

And you think that you have trouble getting your cat to go out at night? Imagine what it's like when she has a whole theatre as a hiding place!