How did I get here

I don't remember what I was doing here,
Sitting in a car with my sister and mother,
Pull from-I discover somethings wrong,
My sister, my dear sister, whats happened?
She is crying while I drive to her house,
That's not really her house, but we go in,
A conversation ensues and I find out abuse,
"He has beaten her!" My mother says,
Just as my brother-in-law walks inside,
But it doesn't really seem like him,
Something is off-she runs up the stairs,
Screaming, but I follow her all the same,
She leaps onto the bed, weeping she says,
"Nothings the matter, I deserved what I got"
I noticed that it wasn't her anymore,
And she is making small cuts on her torso,
Using a blade dulled from too much use,
I hold her down and prevent her cutting more,
Asking her what the hell she thinks she is doing,
She tries to lie but I see right through it,
In response to her lies I respond back in fluid,
"Don't give me that bullshit, I used to cut too"
Awe and shock overcome me and I let her go
We are the same person, but she was suppressed,
I have denied my emotions and with it her,
She dissolves into me and I am left alone,
The universe disappears into a white unknown,
And then, I woke up.