Oddsunflower,
I know just sitting there and hearing the things your AH is putting your name too can make you mad. How dare he attach my name to his thoughts. I can image you just wanted to scream at that point when you heard it.
I think you handled it great. You stayed calm. You let your son vent what he had to say. You calming stated those were not you thoughts and you moved on. Good for you.
Anytime you need to vent you can always come here. Keep being strong and have a great day.