I was with my XWH for 26 years, from age 19 - so I was in the same boat as you except I didn't have young children - mine were both over 21 when this all went down.
After spending all of my adult life as 1/2 of a couple, I had no idea who I really was as an individual. So I explored that. I also dated some people who were wrong for me. I spent time alone and in IC trying to build myself back up.
Now, 10 years later, I have a pretty wonderful life and I just don't really care about the X, unless it affects my children and grandchildren. I'm way to busy enjoying MY life to worry about whether karma has come to visit him.
Sending strength and peace.
I know it doesn't make your hurt less. I know this has been traumatic for you. He will get his. It's going to take some time because he weasels out of accountability. At some point he will have left himself few options and it will hit but he's going to have to burn a few more bridge before he feels the pinch. Maybe by the time it happens you'll just chuckle about it and go on with your fabulous day.
Go do something you love or go try something new. Go out with friends or go for a walk alone. Get out there and start living your life, they way you want to live it. Do the things you want to do and do what makes you happy. When you aren't sure of what to do, pamper yourself a little. Depending on your $ situation, get a massage, or maybe a manicure. Buy yourself an ice cream cone or get a bag of thick rich cookies and eat them quietly at home. If $ is an issue, dress up, do your hair and makeup and go window shopping. Whatever you would enjoy.
Im here if you need to chat!!!
*Finding my strength*