@Midnightoil2020
Your anger jumps off the page, together with very deep personal hurt and fear for your children at the injustice of your Ex being happy after what he's put you, his children and your parents through.
I will admit I am a raging ball of anger and resentment and it’s not healthy
BUT you need to find a less unhealthy avenue to channel your anger. The way you feel, whilst justified, is not doing you any good at all - how could it? You have no control over what he does outside his life with you or even what he tells his children. All you can control is how you react to this. How you strive to live your own life, and protect your children as best you can.
Perhaps this has been touched on at your own counselling sessions?
One of my kids in counselling. Me the same. Another wetting the bed .
You have enough on your plate already without finding out who the next woman is, what's going on in her life, trying to warn her (and get some revenge too?).
All this will do will be to bring his full, aggressive, manipulative anger back onto you and your children. Any "anonymous" warning from you will be identified by him as coming from you and he will hit back. You have seen how destructive he can be - why would you invite that back into your lives?
I do not blame you, in the least, for being so angry and want to see his life go up in flames for the way he and, by association, his family, have treated you. I'm just saying that those flames would do you all harm too. He will use his children, your children, as weapons against you. Please do not allow this to happen. Certainly not through any action of yours.
Can you bring all this up, as openly and honestly as you have been here, to your counsellor when you next see them? Is your next appointment soon?
Do you have any time for yourself, OP? Maybe burn up some of your angry energy by running? Swimming if your local pool is open? Or boxing would be good to release some of that pent up turmoil. I know I found Boxing, with a trainer and using a punchbag, very useful at one stage of my life.
Distance yourself from him, emotionally, as much as you can and build your defences and that of your children by living as happy a life as you can, day by day. Every week, every month, is another step towards your children wanting nothing to do with him and building their own lives with no input from him. Isn't that the best revenge?
I know it's hard and that you need to keep finding the strength to live your life well every day. I think you can do it. Good luck, OP🌹