It's not your job to teach her a lesson and most especially not using your children.
How you see it means, did she cross a boundary? If you say to her W if you want to date others, I can't be a part of that. If you want to date, I won't be involved with you romantically but we will still be parents to our children.
Done!
Step out of that persecutor role, it's controlling.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss
