So sorry, Heavy. Wish I had an answer re: normal vs escalation. Your W really goes out of her way to make things painful for you. It seems like you're keeping your cool in the midst of it all. Maybe you could write her a letter, stating very clearly what your agreements are and that you expect her to adhere to them just like you do. Might help, might not... I just find that for me, when I put something in writing, it can't be twisted for something it isn't and I can't get riled up.
Hugs and prayers.
Me: 46 Her: 41 M: 5.5 yrs / S: 20, 18 3/26 W and I meet OW BD: 5/2/2015, she takes off ring W goes to stay with OW 6/26 NC: 9/5 Both moved out: 10/16 I take off my ring and feel... healed: 10/19