[John Reidy]

Patty,

How good are you in judging the lighting conditions that this shot was done under? If you have a good idea of what type of light you were working with you could try along with other poses of both children a bunch of shots of just the girl in the same light and orientation (direction of the sun). This should be easy if you shoot at the same location, same angle, etc. as the first shot. Then you might have an option of putting two photographs together using the best of both kids.

I do agree with Michele, I would avoid the teeth if possible but if you are careful you could get a good painting from the boy's current photograph but the girl is beyond as a good reference.

Remember, you are the pro. Don't settle for 2nd best and politely stay confident in getting the best resources possible. To accept less will doom you to a painting you may not be proud of.