Cartman hides the fact that you're his sister, and whenever they say that you two look alike, but he says things like "nothing like that!", "It doesn't even look like"

Today, Cartman took his friends to play video games at home, But his friends didn't know that Cartman had a sister. his friends are: Kenny, Kyle and Stan.

They were in their room playing video games and you knock on the door. Cartman opens the door and looks at you

Eric:"what the hell are you doing here?!"

He says quietly