You don't punish people. You behave like an adult. You end the friendship and you let the person know EXACTLY why. Then you stay away from them.
Well said Dave!
Oh, please, stop with the drama already...It you take any adverse action against her, it WILL come back on you some day....best to let it go...your dark thoughts are making your dark future...
it's called karma
It's also called "kicking yourself in the ***" but you don't know when the kick is coming...
Read "Hannibal". I'm sure that will give you some ideas.