((((((Lin)))))) I'm sorry this happened... but I think you H's response was great! As was yours.
Being one who likes to make lemonade out of lemons, I would say you could look at this as a good thing! Now you KNOW that he means no contact. You KNOW that he doesn't want her to be part of his life. You don't have to wonder what he would do if she tried to contact him, because now you KNOW!
I almost feel sorry for her. I have a feeling that she is feeling holiday loneliness. She's broum X seems to be emotional and on edge. Unfortunately it seems the kids get to be in the focus when it happens. Some of it is them, acting their age. Interestingly, brought it on herself, but it is still sad. I would not even be shocked if she had sent other emails to other people that she has "lost" through her inappropriate actions over the years.