<human>: Can you succinctly summarize the text in 1-3 sentences?

Hello all, this is my throwaway account.

I am a twenty year old girl who left to live on my own in New York last week, my family still lives in Texas (two brothers and mother). My youngest brother, who is 13, sent me a disturbing email today detailing what my mother has been doing to him in my absence. Subject line: Why does mommy have to be mean to me every chance she gets :(

Apparently, she told him to clean the staircase and there was some miscommunication and she attempted to hit him while calling him stupid. The next day, he came back from his class late (he had to catch up because of a transfer). His words: " i hesitated and finally did and the lunged at me as i was kneeling down and she started to hit me with the high heel on her shoe on my head and face i mean the actual heel she was kind of stabbing my head with it along with the rest of my body as well as she hit me with the sole on every where else so now i have 5 bumps all over my face and head."

I called my other brother to ask what was going on and he confirmed what was going on, but was afraid. The problem is, this exact scenario happened to me when I was younger and didn't want to go to church this morning, all the way down to the shoe beating. 

I'm not sure what to do. Should I first confront my mother, or should I just show my father the email my brother sent? I worry because at this time, it is only my little brother and mother at home (other brother went to sports practice) Or is this a problem for a higher power?
<bot>: My 13 year old may be emotionally and physically abused and I am too far away to confront my family face to face.  Wondering whether course of action to take :(