Bright, Bea's post is spot on. It's understandable that you would be hurt and disappointed that your son wasn't invited, but like Bea pointed out, your son is old enough to speak to your h about this. Allow him to make the decision as to whether or not to speak up about it. You can't fight his battles for him all of the time and this is all part of growing up.
As for removing/blocking some of the inlaws on the net, I wouldn't do it unless this is really something you want to do. If you have had a good relationship w/your h's family, then keep them on your communication links. If you haven't, then you will need to decide what you want to do. You do not want to come off looking petty and spiteful because your son wasn't invited. Who knows what was behind your son not being invited, but I would rise above their behavior and show them the Bright that we all know and love. It's their loss if he's not invited.
Keep the focus on you and your life.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
