Fung,
Her stated reason is that he has been acting out (he is 8), but that occurred after he stopped going... logic is not her strong suit.
The real reason is how close it had made my son and I (I was an instructor trainee in his class) and her jealousy over it,
Sadly, Pinnacle is not the most messed up thing in my life -- my ex is.
You almost always leave money on the table -- make sure you leave some of the other peoples' instead of all of your own..