I am sorry aobut your aunt. I can't give you any answers, but she sounds like a wise old soul.
frijole
In May 1998, I lost my Mom to Non Hodgekins Lymphoma she was only 56 years old and fought that rotten disease for four years, she had a stem cell transplant in 1996, she did everything possible to beat it. My advice would be to make sure your Aunt is comfortable and don't let them use her elderly body for trials, let her be happy and loved. NO PAIN, theres many meds out there to keep her comfortable.
My prayers are with you and yours,
Diana