Hi OP,
Thanks for sending me the link from the other similar thread we were both on. I'm really sorry that I didn't post on your thread earlier, but there has been alot of work stuff come up and for some reason I can never post on Mumsnet on my mobile, only on the laptop.
I'm really, really sorry to hear what you are going through both with the break up and divorce and now the problems with the friends you share with your STBX.
Its a sh#t thing that has happened to you and I'm sorry to hear about the pain you and your children are going through at the moment. Your STBX sounds really horrible and you are well rid of him.
I know how painful things like this can be to go through. I've had my share of horrible things happen. And going through that level of pain, it was all I could do to just function and hang on till it got better. Its abit like being in a storm at sea, tossed around helplessly while you fight the wind, rain, lightning and giant waves while you try to survive and regain control of the boat.
You are on an emotional seasaw at the moment, and while its very easy for me or others to say you'll get over it, when you are going through the trauma of betrayal and break up I know it can feel as though its never going to end. You just need to hang on and keep hanging on, because there is going to come a time when you will realise that you are through it and emerged into the calm of a new life. These horrible things that are happening at the moment are forging you into a new woman - a better, stronger and more complete individual than you ever were before. I'm just sorry for all the pain and hardship you are going through to get to that new you.
Your friends - as you may nb from the other thread there was a particular couple who introduced my OH and myself who split after we got engaged. We really tried the whole being mutual friends to both as we cared about both of them, but the guy ended phasing us out and dropping us. Looking at it now from what you said about your situation perhaps its really just not possible (even with the best of intentions) to be the type of friend that is needed to get someone through a split if you are supporting both people.
OP if I were you I think I would also feel hurt and upset by your friends having dinner with STBX and OW. In your situation I think I would probably feel that they were unjustly 'validating' his treatment of you and the children. I'm not sure that its something they are actually intentionally doing, but I do think that's how I would feel about it. It would feel rightly or wrongly like another betrayal.
So I think that you are doing the right thing to phase them out, because what you need to get through this OP is for your friends to be behind you 100%. You need your friends to be completely partisan and tell you that STBX is a big waste of space (which from what you've said he is) without honour or character. You need them to be 100% that you are better off without him and help you get to that point where the storm is over and you are transformed into the new and better you. If having these people as friends hinders that in any way, then it is best to put them to one side.
Thinking of you and your children OP. Wishing you only the very best.