Oh poor poor dear Nancy,,this is the saddest thing I have seen.
She protected her husband's image and his legacy from the most minute or grandest indignity through her devotion to him during his period of illness. Her devotion is nearly mythical in its proportion, and would that everyone find someone capable of such tremendous love and absolute loyalty.
Someone once said "all great love affairs end tragically"...especially when one dies before the other.
sw