Physical therapy for a broken hip is very effective. But the plan must be laid out by a physcial therapist depending on the type of break and the kindof treatment.
I would advise you to go to the hospital or rehab center as soon as possible to get the recommendations for your wife's ongoing therapy. Also, you should get instructions on how to do the excercises if she does not know how.
Often, the therapy at home for a broken hip is at the very least a regime of range of motion exercises.
Any thing that reduces mobility, may create a psychological problem. It is as if the rug has been pulled out from under her feet. It may lead to lack of confidence and fear of falling. Your wife may need extra support and assurance. Physical therapists often push a patient past what those of us who are untrained can do. Your wife may need that kind of confident prodding. When you are learning how to help, notice not only how to do the exercise,but also, the tone of voice and the type of confidence in the voice. It may seem pushy, but is probably what is needed.
You will be able to get referrals from the hospital. Also you can
google physcial therapy centers or home health agencies in your location.