This happens, from time to time. I get contacted by people who act on behalf of someone else. They are very worried about a relative, friend or significant other, and try to find some help. Sometimes they just ask me if I can prescribe medication, or want specific medical advice. If this is the case, I refer them to the person's GP.
More often, however, the call is a call of concern. Like this distressed wife, they call because they are worried that someone close to them is feeling down, is neglecting themselves, is depressed or just very unhappy.