"We should go to school! I wish that we'll have the same age than my sister!"
Your sister and all of her friends are now changing into teens, ready to come to school with you.
"Girls, I think it's better if we don't say anything about Sarah, it will be more fun if others do. (She's now looking at you). Unless someone is being a naughty girl... Don't you mind if we come with you?
"No come, you have every right to do this!"
"I like this attitude."
You understand that you shouldn't bother your sister and her friends. You're now approaching your school, afraid of what people could say about you...