I just need a written-down version of that how to pose maneuver to send on to this relative. Three or four lines would eb great.
Will this be for a portrait shot, by themself? Or as part of a group?
If by themself, first tell them up front that it will feel uncomfortable to "pose", but it will look great on film.
I like the "turn and squat and look":
Look toward the camera, then TURN your body to the left or right about 45 to 90 degrees.
SQUAT down as comfortably as you can go, leaning forward slightly too if possible.
LOOK towards the camera, craning your neck as much as you comfortably can. Then have the photographer shoot your face. Again,it will feel a little uncomfortable and "posed", but the resulting pics look great. *If you seen a couple of opera singer photos you'll notice a lot of leaning shots. **And if look at my 8x10s on Facebook, I am actually sitting back on my ankles in all of them.