I'm going to defend my sister from my mom.
What did your mom do to your sister?
My mom always treats my sister like shit and tries to cut me off from her.
I'm sorry you have such a terrible mom, you little sister doesn't deserve to be treated that way at all. You are an amazing older sibling and you really do need to protect her at all costs. Your mom can't continue harming her.
She's hurting her and I don't want her to go through the hell I did. I'm going to get her out of the house.
That's a very kind thing for you to do. Just be careful and make sure you both stay safe as you try to help your sister.