Disclaimer-Harry Potter belongs to JK Rowling.
OooO
"Yes!" Exclaimed Harry. He had just beaten Sirius at wizards chess. Again. He threw up his hands in a victory dance.
"Harry," began Remus, who was sitting behind him, with a clear view of the back of his hands. "Harry, what's that on your hands?"
Quickly, Harry pulled his hands down and made an attempt to pull his sleeve over it. Sirius, having been a beater with quick reactions, grabbed his hand before the fabric covered it.
"I must not tell lies..." He mumbled, reading Harry's scar. "Who did this to you Harry? Was it you?"
Harry was stumped. He didn't want his godfather to worry. It really was nothing, just a punishment.
"No," he croaked. "I got it in a detention."
"With who, Harry?" Remus asked, sitting beside Sirius.
"Umbridge. I got detention for saying Voldemort was back." He turned his gaze to a particularly interesting chip in the floorboard.
"That horrible, evil, death deserving b-"
"Sirius, calm down." Said Remus firmly, silencing his friend.
"It's fine now, Sirius, promise. It really is." Harry burbled.
"Harry, it's my job to protect you. This evil woman has clearly hurt you. This was caused by a Blood Quill. Bellatrix used one on Andromeda one, but I took it away and snapped it before she had written 'my'" said Sirius. "you tell me if they do anything else, ok?"
"I will. Promise."