Disclaimer: Sadly, Sirius and Bellatrix don't belong to me. They belong to the brilliant J.K. Rowling who is amazing.
A/N: I always wondered why Bellatrix never right out killed Sirius She stunned him. I mean he still died thanks to the stupid curtain but she didn't you know actually kill him. Never mind. My thoughts on her thoughts.
They were dueling on top of the arch. Both masterful duelers. She had already taken down the Tonks girl and he had already taken down a few Death Eaters. Now it was just the two of them. Cousins and mortal enemies.
"Going to kill me Bella?" the man taunted as the dodged each others curses. "Kill your own cousin." He said the word with venom.
"Nothing would give me more pleasure Sirius." Bellatrix snarled back. She glanced over his shoulder while shooting a stunning curse at him for the thousandth time. Her companions were dueling with all their might but the Order was matching them. The boy still had the Prophecy. She hated to admit it but the children who had come so foolishly were surprisingly good fighters, especially Potter. Well, she decided he did have something to fight about. She dodged another one of Sirius's spells and sent a stunning spell at him. It missed by a long shot. Again.
"Your aim is off Bella." He taunted again. He knew that it wasn't the best thing to do but he had too. He was Sirius Black after all. She shot another spell and once more he dodged it. "Why aren't you killing me?" he asked. And she froze for a millisecond. Why wasn't she killing him? He's family. A small voice said in her head. Even though you hate him he's still some of the only family you've got.
"Stupefy!" She cried in desperation. Now was not a good time to develop a conscious. He laughed as he dodged it.
"Come on! IS that the best you can do?" His smile froze on his face and his eyes widened. She had gotten him that time. He fell slowly off of the arch and through the veil. The duels seemed to stop. She watched in semi horror as he fell and disappeared through the veil. She stood there for a minute and met eyes with Harry Potter. His grief and anger flowed into her.
What had she done?
She regained her senses. She was Bellatrix Lestrange! She never questioned what she had done. Never. SO why should she start now. As a member of the Order held Harry back she ran. She didn't know what she was running from but she ran. She heard footsteps and knew it was Potter.
"I killed Sirius Black! I killed Sirius black!" She chanted but her heart hurt thinking about it. He was family. The voice said again. Why did she care she had never…she cried out in pain as the boy hit her with the Cruciatus curse. She laughed and faced him.
"You have to mean it Potter." Her conscious was gone. She was back. It had been a fleeting moment. "You have to really mean it. I killed him." Her heart didn't hurt, she didn't feel guilt. She was a murderer. She was a killer and that was all she would ever be.
A/N: That's all. I just thought it'd be fun to write. I know it's short but that's all I had. I sorta combined the movie a bit with the book. Hope you liked it. Leave a review and let me know!