You are right. "Nice" just does not work with xW -- and has in the past lead her to heighten her hostilities against me.
I do not at all relish the thought of these battles persisting forever. Just when I think things have settled down some, she does something else to shake things up again. I like to think I am learning to resist being fully involved in her obvious desires for conflagration. But it seems it will take a lot longer time than I expect to finally cycle out of this pattern. I pray one day she finally gets the picture that I am not ever going to abandon my children to her and that she decides to desist once and for all from these follies.
I have had to resign myself to the distinct possibility she will never give it up. My job then is to minimize the impact to me and our S's.