(A Note to Self)
First, find proximate cause for inquiry, but mask it with leading questions.
Example: "Has the weight loss affected your ring size?" doesn't work because it's too specific.
A better method is more roundabout, requiring the patience of Job:
"Are you really still able to wear the same clothes after the weight loss?"
If yes then say, "does the wedding ring still fit?"
If yes then say, "that's good. I don't want no excuses for not wearing it!"
Then add, "Your shoe size is so small. Hey, speaking of rings, I bet you wear a small ring size."