Call her a hoe. Makes you look incredibly ignorant and we laugh. She hasn't slept with as much people as she told that scumbag husband of yours; and just because he left you for her doesn't make her one. You can sit there and blame her for the rest of your life, which you will, but don't ever forget what you did. Don't lie about it either. Nothing I hate more than a lying hypocrite.
Seeing this really made me think. We don't know anyone's story or what they've been through. One thing you say to them could trigger them to commit suicide. Think before you speak. Send a random person a smile. It costs nothing to be kind.