Get her to tell her mum
For god's sake don't tell her mum behind her back (because that will crush any courage she has left to tell anyone), but she needs to know that unless something changes then the situation will not change (except that the violence may get worse). And then read through the posts here to see that the only way of her mum dealing with this is to go in and refuse to leave until the appropriate punishment has been promised.

If you can go with the mother to said meeting, then do, otherwise she may leave being given the lines that "it won't happen again".

Good luck.
(Psyche finishes work at the end of June! Yay!!!, Mon 18 May 2009, 8:17, Reply)