Why do big sisters think their better than us?

I love my sister but she can me such a bitch at times. She things she’s so superior to me and always insults my friends (who I’m no longer friends with) because I’m hanging with the worst could. She told me if I would stop acting so stuck up and vain and listen to people that are older and wiser, I would understand. She always shots back with a witty comeback when I say my opinion. I love her but what a bitch.

Why do big sisters think their better than us?
Post Opinion