I'm going to physically fight with my sister.
Why would you fight her?
She deserves it because she's not nice to our mom.
I understand why you're upset with your sister, but hitting her isn't going to solve anything. It's never a good idea to hit your family. I think you should talk with your sister about what's bothering you.
I'm kind of flaring up right now, that's just how I am.
I think you should try and calm down. Family disputes should never be solved by fighting.