It is rude to downplay someone's good news.
Joseph's sister just got accepted to her dream school and Joseph feels jealous.
Joseph wants to help himself feel better.
Joseph congratulates his sister and then vents his frustrations in his journal.
Joseph tells his sister that she was only accepted to the school because she is a girl.
Joseph's sister is happy to have a supportive brother.
Joseph's sister is offended and angry at Joseph.