I am just stunned. I knew she wasn't in good health, perhaps a bit poorer than my own. Certainly we both have risk factors for heart attack. (I don't know the cause of death but that seems likely.) It's just surprising when death finally does occur to someone who has chronic illness. One gets lulled into a false sense of security by the status quo. If a person has managed to live with poor health for quite awhile, one expects them to continue to do so.
I am sorry I didn't hear about this in time to attend her service.