It was Sirius's turn to be pulled suddenly into an empty classroom after dinner. Startled, he saw his younger brother, "Reg!"
He was going to hug Regulus but the glare held him back, "Why did you bruise Adaline?"
Looking down at his angry little brother, "I thought that her Uncle set up the friendship."
Reg's hands were balled into fists, "She's not like that Sir." Pulling out his wand he brandished it, "Do that to her again and I'll hex you."
He walked out of the room as Sirius answered, "Not if I hex you first." Both brothers fought back a smile, it is what they always used to say before they had wands. But they had never hexed each other. Sirius looked down at the scar in the back of his hand as he wondered if he would ever have to hex his little brother.