Tree:

Sorry to hear about the incident in front of your son. Has she ever done something like that before? How has your son responded to it? Does he need to get some professional help? 12 is a tender age to see these types of things and go through the trauma of loss. If he doesn't work through this in a healthy way, his future relationships might be scarred. I don't say this to scare you, but rather as a result of reading Susan Anderson's work on abandonment. Children who have been abandoned, through death or divorce, can find ways to cope that help in the short run but hurt them as adults.

I hope today is better for everyone, your wife included. It's hard to have compassion for them at times like this, but I believe we must do so. Anger, vengeance,etc. are not the answer.