I can see both sides about the birthday party - it was totally not cool to not invite you especially when they had borrowed your car that day. But at the same time, 13 year olds are at the point where they want their birthday parties to be them+friends and not quite so much family. And, almost throwing a computer across a room is rather an over-reaction.

As to the staples in the head? It happened. She let you know along with everyone else that it had happened. The only person she would really have to go out of her way to contact to tell about something like that would be her husband. It's not really something that you need to text everyone individually about to tell them - she wasn't in the hospital for a few days or anything.

I think being livid about that isn't doing anyone any good, and posting anything passive-aggressive will do nothing whatsoever to help and will instead make your daughter in law wish to have very little to do with you.

If you have an active role in their lives already, then how are you being left out or not receiving any updates about them?