Different from others
Being a dementia patient, Terry was going through a tough life as this had left her disoriented and confused for the rest of her life. The man had to take extra care of his wife as she generally wanders off anytime, anywhere.
For an older person with dementia, caring is not so easy. Before he used to find her, she had gone to some unknown place this time, and the grey man was unable to find her out. As the disease of that women has defeated her ultimately and badly.