the_debt_of_time

"You son of a bitch!" Sirius charged forward, forgetting the fact that he was
supposed to have been looking for Peter and Mary. He could not think straight. All he
could see was Lily falling into the Black Lake, Mia breathing life back into her body. He
saw Death Eaters surrounding his bleeding body at Grimmauld Place while Walburga
pleaded with Voldemort to spare Regulus. He saw Mia's scar—Mudblood—cut across her
arm.
Red bled into his sight, clouding his judgment.
"Bloody hell, Sirius!" Regulus shouted as he deflected Sirius's attacks as best as he
could. His smaller frame and Seeker reflexes were lending themselves well to duelling, and
Sirius's lack of control was not helping in the assault on his younger brother. "Stop! I need
to—You stupid, reckless—Sirius, you're being betrayed!"
"No shit!" Sirius snapped and tackled Regulus to the ground. Both of their wands
fell from their hands.
Regulus was still fighting back, dodging punches. "Stop! Brother, I can explain―"
"I'm not your fucking brother!" Sirius shouted and sent a balled fist into Regulus's
face, feeling the satisfying crunch of cartilage. With Regulus bleeding on the ground, Sirius
summoned his wand and stood up, aiming it down.
"Wait!" Regulus pleaded, eyes wide.
Sirius hesitated just a split second too long, and Regulus regained his wand just in
time to throw up another shield.
"It's not what you—Fuck, stop cursing me, arsehole! I'm trying to tell you I'm
getting out, and I've got information that your precious Order needs."
Sirius was shocked at the words, but he did not take them to heart. Once a Death
Eater, always a Death Eater. "You are such a cowardly little shit! You go off and join the
bloody Death Eaters, and when it gets to be too much, you back out. What? Didn't feel
like torturing your family members in your own home? Did you think that was a fluke? An
off day where Bellatrix just got bored? No! That's what they do! That's what YOU
do! Stupefy!"
"Protego! I don't! I've never.. ." Regulus lowered his wand. "I-I didn't... I don't
anymore. Sirius, I want out!"
Shaking with anger, Sirius struggled with the image in front of him. Regulus, a Death
Eater, his little brother. He was not wearing his usual sneer but instead looked panicked