you need to make her suffer what she did to you. and violence is not the best way, the best way to do it is this.
Get your self some nice flowers and a can of bears. go to that guy place tell him you're sad but not mad whit him and get him drunk.
when you find out his drunk fuck him all over and video tape it. send the video to her and that's it! you'll move on.
the worst think that can happend is her calling you to have a treesome with her and the guy
