Hearing her say this wasn't too surprising because if I was in her situation I would want to do the same. The thing that surprised me the most was she doesn't take much medication and just deals with all the pain and discomfort. If she took an Advil here and there i believe she would be more comfortable and not always complaining. I brought up the idea of going to the doctors to get some medicine for her cough and she threw a tantrum like a two year old. It is possible that she doesn't want to feel like she is relying on medicine to keep her alive and she wants to die "naturally" and if it's her time to go she wants to just go.
One thing that made me sad was she stopped something she loved doing all her life, which was art. She tells us that her arthritis is so bad she can't hold the utensils necessary for working. If she wasn't so stubborn I bet she would be able to find something that helped the arthritis enough so she would be able to do some art. I wish she wasn't so stubborn and was more open to some medical assistance so she would be in less pain.