Perhaps she needs a good movie. Seriously! Results to these fur-friendly films differ - My cat is only interested in the birds, while others cat captives sit silently for an hour or more.
With more cats living indoors these days, I am convinced that they simply become a bit bored, taking up bug hunting and human harassment to pass the time. Why not try a video made for cats!? Give it a go, you just never know what that cat has on her curiosity radar.