After six weeks she probably needs to exercise her muscles.. I'd give it a week or so to see how she does..
Her muscles have gone atrophied and need to be strengthened with exercise

Cats are notoriously fast healers from bone fractures. She's probably going to be fine, but you might check it out with your vet.

Do keep us updated on her health, ok?

I advise you to ask your vet.

Awe that poor girl. If she is hopping around on it, she should be ok. The limp may be a permanent thing