That's one I hadn't thought of, despite the picture she uses being a big clue.
I had thought it could be she joined a nunnery (not in the Shakespearean sense but in the 'order of nuns married to god' sense), or her beau was off on a business trip, or her high school sweetheart was killed in a car accident. Mostly curious as to how she would answer, and saying hi in general.
ARS