The other night when she sat chatting for hours with another guy I told her again that dating other guys before we were divorced was completely unacceptable, even if it was in cyberspace. Of course she told me that since she was divorcing me it was none of my business and I should bugger off. She's not my W anymore and I have no claim over her and that is that.
So what did you DO about that? You laid out a supposed "boundary" for her, and yet there was no consequence for her violating it. That makes it not a boundary at all; more like a "wish", as in "I wish you wouldn't . . . "