I need help.

So my girlfriend (17) is eventually beaten by her mother quite often. Whenever we talk and she tells me about how much her mother has hatred for her , shivers run down my body. Her mother just hates that she exists. And despite all this , she doesn't hate her mother because she's still her mother. Once , we were talking and she told me that her mother often says that "tumhara to r@pe ho jana chiye.", tears welled up in my eyes reading all that , it's so sad. It's not like I haven't met her mother, we have interacted quite a lot but whenever I talk to her , I never sense that hatred she has for her. She acts all good and innocent. I try my best to Comfort her. But sometimes I feel really sad for her. I don't get a lot of time to talk to her cause of studies and stuff but We do talk daily. We don't meet usually, like once a month or two only. Pls help me with some things to comfort her or make her feel better.