Good that you didn't...something was wrong with that person.
Sounds like the lady might be suffering from something like Alzheimer's disease, John. That sad malady isn't just forgetfulness - it also causes depression, bi-polar behavior, schitzophrenia, the whole gamut of mental disorders as one's brain is ravaged.
More and more of such going on, as our lives extend with medical advances. Perhaps too long. My Mother, who died peacefully in the night, was worried that someday she would lose her "buttons". Thankfully, she passed on ahead with her wits intact.