As i said, be nice to her, that will shock the living day lights out of her

but concentrate on the other 7 more when chatting and enjoy your life....
I always think the best thing to do when someone hurts me is the reverse of what they expect..
Plus on the "plus" side, the others will never see you angry, hurt or disrespectful to her which is a bonus, if she happens to keep up the nasties and you don't... Don't you think?
HAVE FUN...
CW