my special sister

I have a little sister.
She's very dear to me.
But you just think shes different,
the outside's what you see.
My sister's not like yours
and that is all you notice.
You point when I'm not looking.
You sneer, and laugh, and hiss.
You think she doesn't notice,
She doesn't understand.
You taunt a helpless child.
You have the upper hand.
Does it really please you
To point, and laugh, and stare?
You think she doesn't notice,
or see, or hear, or care?
My sister's not like yours
But don't you dare upset her,
because my sister's not like yours
to me she's much much better