jks you said that your L requires a retainer fee to file, but have you thought about some kind of separation agreement? That might help you set and enforce boundaries with your H especially relating to the kids and the OW. H is really not putting you in a good place, I can only imagine how stressful this must be for you.
I also noticed that you had previously said that life, and not you, would teach your H a lesson but it sounds like by texting/calling him back repeatedly about the violated boundary that you were trying to do the teaching. Of course you were upset, and I can't say I wouldn't have done the same thing. Again, I think possibly having a separation agreement between you and your H might help you manage the situation a little better.
verab, I am just now seeing your post... I don't know why. Do you mean make an agreement on paper and sign it, just between the two of us? Or involve lawyers?
Me: 32 H: 32 M 9 yrs #1 D7 #2 S5 #3 D2 Bomb 8/12/11 H moved out 8/14/11 PA started w/H & OW in 1/12 - found out 3/24/12 Got my own place 8/25/12 H & OW move in together 9/15/12 Still married.