Betrayedafter20, I have a few thoughts and questions. I'll try to keep it short and to the point.
1. T/J: josiep, your posts to Betrayedafter20 in this thread are Rockstar material. They are so solid and full of clear-eyed wisdom. Thank you!!!!
2. Betrayed, what will happen when he has a new girlfriend? When she's around your kids all the time? When she forces the STBX to exclude you, out of respect for her? Are you preparing yourself for this inevitable time?
3. With all of the efforts you are making toward sucking it up to hang with ex (including ex in things, allowing ex to do whatever) do you understand that your kids see it as watching you disrespect yourself? If they know you were treated badly in the R (and they do), then watching you behave kindly to the man who hurt you is interpreted as weak and having no boundaries. This can be very upsetting to kids, causing them to make all sorts of psychological transfers to never be in the same position themselves. ("I'll never marry a weak woman," so accidentally marries a narc. Or "I'll never be weak like mom," so stays emotionally unavailable and distant, never loving or trusting anyone.) This stuff happens. Kids need two parents with healthy habits, and playing nice with my abuser is not considered a healthy habit. They do not expect parents to overlook horrible treatment, nor do they want that. I've known kids in this position, and they hated witnessing the weakness when they wanted to see strength. Your kids love you and want you to respect yourself.
4. There are many great websites on "how to establish healthy boundaries" that will help you come up with some. I found them extremely helpful as I am not always clear myself.
5. Lastly, your only parental jobs are to love yourself and love your kids. Your job is not to "love their dad;" that's their job, if they deem it appropriate. We don't owe anyone love, but hate is not the only option besides love. Detached indifference is more appropriate. By loving the ex because he is their father, even though he has been horrible to you, you are failing at your primary job: teaching your kids the importance of loving themselves.
For your kids' sakes, be firm but kind with the ex.
[This message edited by OwningItNow at 5:29 PM, July 1st (Wednesday)]