RX, these cituations can frustrate the heck out of you and push you over the edge. Emotions always run high when our kids are involved but be mindful of your emotions and don't let emotion dictate any bad judgement that can be used against you later. I'm in no way saying you would or will but I've seen these kind of things do a 180 and put all the power back in the wrong hands. Now if you believe your son is in harms way then I say all bets are off and you do whatever you have to do to protect him. Just don't give her anything to use against you. You're fighting the good fight, keep it up and you will prevail.