Yes, anger did get me geared up and thinking, but it's been a long time since I have been so. Just don't let it overwhelm you, although I don't feel you are. It's still early days for you.
Think on this .... if he leaves, OW will have to deal with his mood swings and other MLC symptoms. She will be constantly wondering when he will go back to you and your boys. In the meantime, you're their awesome mom. My H lost a lot being away from our children, while my R with them is solid.
Stay strong.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim