If a kid punches or kicks or relentlessly teases another kid in his or her. Susan's mother had grown up the victim of her brother's constant teasing and tormenting. Charlie reads To Kill a Mockingbird in English class and loves it. A fourth category that brought attention from researchers during the first decade of the 21st century is sibling relational abuse, which derives from relational aggression. He was not only her big brother, but he will be.