Ratatosk

Let her oversleep and suffer the consequences. Tell her you'll wake her up once and that's it and don't worry about it. Let her be responsible for getting herself up, tell her you're leaving without out her. Sounds tough, but I seem to recall my parents doing that to me. Didn't miss my bus to school, but I did miss breakfast and ran out the door without any makeup on or my hear curled. From then on, I got up when my alarm went off.