I was wondering that, too. She didn't speak of him at all. He could still be mischievous.Not to excuse her actions, but it takes two to tango. Did you also confront your SO? It seems to me that the conversation couldn't have gone there in the first place, if he hadn't been a willing participant.
The way it works in my own marriage, my spouse and I know where we've drawn the boundaries and we expect each other to defend the borders, so to speak. If someone crosses the line, we expect each other to inform the offending party. And to break off all contact if the other person isn't respectful of our parameters.