gs9's advice is great. If you've already said it, let it go. I will probably let my official day go by in silence. I've told H all he ever needs to know. If he remembers it, great. If he forgets, well then, it couldn't have meant that much to him. He knows how much I do not want D. He's just certain he'll never be happy unless he gets one. And like you, I've told him his happiness is coming at the cost of mine and our children's. He is still determined. What do you say to that?
If you have to say anything, if you're just not the type to be silent, wish her well. What else can you really do?
I'll be here for you...lots of us will. I know I'm counting on you to be here when mine becomes final!