TotallyADD...hugs to you and your wife. Your reply was very good. No bitterness. Your son should notice that you make no excuses and do not try to justify anything. By the way, my older brother vented on my parents some years ago. He continues to be a good JW.
I like jgnat's advice. Do cry with your wife if you feel the need. Share this, as bad as it might feel. And, maybe your son needs to be mad and hurt for a while to sort this out for himself. Just be there as you are able.
Bob