Well, what is she doing for physical therapy?
Diet is one of the huge things though that I can see be corrected. The more chronic inflammation the worse off you are because it's called adhesive capsul-ITIS for a reason. The synovial tissues get inflammed and then get gummed up and stick to each other limiting mobility.
If she's getting good stretching and decent mobility work from PT then all you can really do is focus on proper sleep and diet.
If she isn't doing PT then I'll talk more about it here..