if he doesn't want her charged, that's up to him, but I hope she feels guilty as hell every time she sees the wound and then later the scar. Cheating is wrong, stabbing people is more wrong. Okay so it was a crime of passion, it wasn't like clubbing your partner one because they've bought the wrong brand of toothpaste or served you mash instead of roast potatoes... but to stab someone is still a pretty extreme thing to do.