get some proper nice gift for her without letting on, something you can roll with where ever. let her get her bitch act on like usual, get real quiet and act hurt without saying anything, then tell her you got her something that day and give it to her. right after you give her whatever you got for her, step out the door without saying shit or giving her a chance to apologize. turn off your phone for at least one hour then show back up unannounced. during the time you are gone she will realize how wrong she was for doing what she did while also having time to realize how much of a mack you are.