How does Nadira feel about being included with Aisha's friends at school in Section 9: Chapter 11?

As Aisha's friends talk about their plans for college and for the summer, Nadira is angry at first as she realizes Aisha feels alone and is using her because Nadira is the only one who knows what is going on and that makes her feel safe. Then, Nadira pities her sister for being so concerned about her friends' opinions.