What do you think if I going to yell at my sister during her party?
Did something happen because why do you want to yell at her during the party?
I'm disappointed at being so insulted at being so forgotten about being so neglected and being so mistreated by her.
Sisters can upset us easily but you shouldn't yell at her during the party. It will make the other people uncomfortable and you will end up being the person who looks bad.
I want to be the center of attention.
I also know it's out of your character to yell at your sister at the party, so please don't embarrass her because it wouldn't be a smart thing to do. You can do something nice to be the center of attention if you want.