Mandy, Until he has had the time to really focus on what's he's done, he'll continue to perk. As long as you and your son are still living in his house and haven't relocated, this will be a thorn in his side and he'll continue to focus on this situation. The only time that they really focus is when there's absolutely nothing left to fight over, i.e., when the dust settles.
You can be sure that he acts out w/everyone he comes in contact w. No one is special in his company not to receive some of his anger and unusual behavior. People just assume that he's having a bad day or someone is giving him a hard time. The new chick, well...she's going to have her eyes open up wide very soon. He can't play the victim for too much longer and she not begin to put two and two together. He can't continue to hide his behavior from her for very long.
So, let him go and wish him the best. You don't want this man in you life like he is right now. Be thankful that she's got to put up w/his nonsense for awhile. Eventually, he will realize what he's done. Whether he does anything about it, that's anyone's guess at this time.
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.
