FYI, when you write her up, have human resources in the room as a witness so that there is no he said/she said game going on!! I would definately write her ass up. Keep a log of all behaviors and dates/times and that is what you use as a guide in what you say to her. If she is part of a union make sure you know how to go about that, all union contracts are different, facility policies are usually the same. GOOD LUCK and another bit of advice, when you present her with the write up, do it about a half hour before her shift ends so that she isn't bitchy all day!!