educating patient

As I posted before, currently I am on gerontology placement. Most of patients have balance problem and fall but recently I have a patient who has LBP without any neurological symptoms. Her main problem is localized pain on (R) low back. Before this time she has been several physiotherapy clinics. However, she reported that the treatments were too expensive and she didn’t have any improvement.

I found that she is doing too much for house working and the patient is really diligent and active everyday. She is doing all the house working for her husband and herself. Sometimes she cooks for her whole family which is really big meal. That’s why I recommended her to reduce house working and shear with her husband for her LBP. And I tried to teach Low Back care and correct posture etc.
One week later I checked her for LBP, unfortunately no improvement. She still complains LBP that I think she is doing too much working in poor posture and poor working pattern. I thought the best way to reduce her symptom is education for her posture and reducing her working load but I think it is really hard to change her working pattern and posture even though she feels LBP.
Because she is old lady and has been house working in poor posture since long long time ago. Recently I gave her handout and showed demonstration for correct posture and working pattern but still I am not sure she is going to change her working pattern and poor posture.

Is there any good way to change her working pattern or reduce working load that is really affective for this kind of patients?