Need help for a cancer patient, refusing therapy

57 yo F , not directly my patient, since i am not and oncologist myself, she is a family friend and she use to come to me for medical advice.

She has a high grade serous endometrial cc, for now metastasized to the retroperitoneum. She wants to heal but refuses to go to any healthcare professional. She claims she can be cured by alternative methods, and cannot be convinced otherwise.

I really want to help her, but i dont know how at this point. Thank you so much