I really hope your relationship can withstand the disagreement that is about to explode in your family because the only alternative would be to completely over rule her if the two of you cannot reach a compromise. She is not completely wrong here as she only wants to do the best with what she has to work with. I hesitate to suggest anything sneaky as this will surely make some one mad, but I got over it LOL. Time to make a move though, so give it a great deal of thought. You could suggest chaparoning your son and see if it makes a difference. (you as the chaparone)