I agree with Leed, someone needs to know what's going on. It must be hell for your friend and her family, not to mention how hard it must be for you to watch this happen. I bet too that her whole family have been at least mentally abused, so much so that they, and esp her mum, cannot see a way out of the situation. Abusers have a way of wearing someone down so much that they are just a shell of the person they were, and all fighting spirit and the ability to see clearly/figure a way out has gone.

Have you spoken to your own parents about it? Is there a school nurse or someone who you or your friend can talk to? They would very good, at least they should be, about handling such a delicate situation with your friend. I can understand her being too scared to call the police.

I really do think that this should be stopped. A childhood of this means that she will suffer for the future too, even as an adult. She may never reach college, not to frighten you, but a lot of abusers keep escalating... and who knows what will happen. I really do think that you should talk to your parents, or someone, and let them help.

Keeping everything crossed for you that it works out well for your friend, and am so pleased to see that she has a really good friend in you.

Hugs