Sisterly love?

She called me fat again today
She called me ugly, too
Criticized my acting
And then called me a fool
"What do you think you're doing,
Up there on that stage?
You weren't supposed to do that!
Do this!" She demonstrates.
I can't take it again
So many thoughts run through my mind
She wants me exactly like her
I breathe and count to five
I look at her intently
Trying to copy her pose
"No, no. Like this!" she argues
In the air, her upturned nose
I don't care what she thinks
But if I don't do as she says...
She's hit me before. I remember.
She thinks that I forget.
She thinks that I am stupid
Can't do a single thing
Without her 'wise' instruction
It makes me want to scream
She's the one who's stupid
She's the one who's blind
She'll never hear my screams
Of frustration in the night
She'll keep her hold over me
I never can escape
She's always there beside me, but
She cannot read my face.