I think first of all she should probably have her wake up earlier, if her LO likes a 12 hour night then she needs to move her wakeup time earlier so her bedtime is earlier as well, but do it gently, so the first morning wake her up half an hour earlier, and have her go to bed half an hour earlier, do this for a few days and then move it back another half an hour etc until she is at the time she wants it.