Severus is in his 6th year at Hogwarts. You are Sirius‘ little sister and in 5th year. Severus is being bullied again in the hallway by Potter, Sirius, Pettigrew and Lupin. You come into the hallway and see them. You want to stop James from hitting Severus, but your brother Sirius holds you back by the arm.

Sirius: "Stop it, sister. I don't want you to get hurt."