Flame to the Fyre Chronicles #1: Black Blood

"I love you."
"That was never in question, Sirius," Sinia mumbled, opening her eyes slowly in the faded morning light, staring into his eyes. The chocolate and honey mixture was hypnotic, and she kissed him gently before he responded.
"I'm certain, but I haven't said it in so long... I feel like I've committed a cardinal sin, leaving you the way I did."
"Where did you go? I never got to ask."
"I was arranging our honeymoon."
"I thought we weren't having one."
"It was a surprise. James thought it up, that since he and Lily never had one, the four of us would go together. He had work, so I said I'd take care of the details." Sinia snuggled closer to his chest, forcing back tears that threatened to fall. Sirius pulled her closer, resting his chin on top of her head, before asking his question. "Sin... what happened that week?"
"You left Saturday," she took a deep breath, prepared for the worst. "The weekend was fine, I was too busy with the invitations to get out of the house. Monday night, I was coming back from the church... the house was glowing green. I wasn't sure what to do, where you were. I was afraid." She paused for a moment to blink back tears, and Sirius was quiet as he held her, knowing the penalty she'd pay if she were to cry. "My best bet was to go in the house. I had nowhere else to go. At this point I was getting angry... that he was in our house, poisoning it with his filth... by the time I got to the front door, I was livid. I slammed it on the ground in front of me, not even bothering to twist the doorknob..." her mind surrendered itself to the memory.
"Good evening, Sinia Santrai. I trust you are well?"
His robes swished gently against his feet and the floor. Her vision bounced slightly with the heat of her anger. She stood in the doorway, rigid, for a moment, before stepping to look him in the face. Her grey eyes bored into his red ones, a battle of wills in the sense.
"Get out of my house."
His grin was at once revolting and devilish. "How rude of you, and your kind is known for their formalities." He picked up a picture, Sinia's favorite, of she and Sirius at the Potter's wedding. "Why do you stay with him, Sinia Santrai? Surely the sex is not so good that a Black Blood Sorceress would wed herself to a dishonored wizard?"
She smiled fiendishly. "What, you could do better?"
"Why don't you let me try?" His eyes were almost pleading. Almost childish. "Think, Sinia. You and I, a Black Blood Sorceress and the most powerful of Dark Wizards... we could have everything. Everything! Please help me."
"There is nothing in this world I need," her voice was quiet, almost a hiss, "that is worthy of the price you offer."
"Consider it..."
"No. Go to hell, but first, get out of my house."
"Make me."
She wasn't even thinking when the first strike happened. It was instinctive, definitive, territorial. Magic didn't even come to mind, just rage, pure silver sparkling rage as her fist slammed into his cheekbone. He laughed quietly.
"You'll physically assault me? Why, did they break your wand?"
"You fool," she whispered. "I haven't used a wand in years."
"Then this should be easy," he didn't stop laughing, aiming his right at her nose. "Avada Kedavra!"
The light was at close range, so it was a near miss, as her energy harnessed and pulled that green light, using physical motion to capture it, she thrust her hand to the side, causing the curse to punch a hole through the wall. She could feel the strength, hers, his, the house's, shooting through the room like wildfire. It ran up and down her arms, her legs, her torso, and the shots rang out, in the proverbial fashion. Though wizard- sorcery dueling was very lenient in the Sorcerer's favor.
"I was in the emergency ward of St. Mungo's for four days after that," she whispered, finishing. I didn't hear about James and Lily, and as far as I knew, the wedding was still on. Nobody told me. Then, when I stepped into the chapel, and all of you were missing, I knew. They sent ten Aurors after me almost the minute I told everyone there wouldn't be a wedding."
"They sent you to Azkaban?"
"Four months," she sighed. "Dementric Rape. Barty Crouch told Dumbledore it was for my protection against Voldemort, but the truth is he thought that I could give him information. How could I be innocent marrying the guilty?" She chuckled quietly, and Sirius winced. "Dumbledore was livid when he found out, and most of the Ministry with him. By that time, I was all but dead, physically and mentally. I was in St. Mungo's for a year and a half."
"Yeah... I remember hearing you screaming."
"Keayalnea beat into me for that," she whispered. "You know the SphynxFyre code."
"You weren't exempt?"
"Never. Were you their secret keeper, Sirius?"
"He buried his face in her hair, stifling his urge to scream in frustration. "No, I wasn't, I wasn't.." He looked her in the eyes, tears flowing. "Believe me, Sinia."
"Always," she whispered, wiping the tears off his cheeks.
"I convinced them to use Peter, that we were... Voldemort would have guessed us. It would have caused us more grief. We discussed putting you in hiding as well, but it wasn't possible. We had charms and our own strengths. Sin... when I heard about you, about what happened, the first thing I did was run home. I kicked myself in the ass for not being there. I should've. I'd promised you..." he stopped to breath, crying into her shoulder. Her face contorted with her own emotional hurt. "I thought you were dead. James found me and made me stay with them for a few days. He promised you were fine, but he wouldn't say where you were. Just that I'd see you on the altar. He told me to leave, to finish all our plans, and that night he was attacked. I went running after Peter. I found him the day of our wedding. I was going to settle this and come find you... we had to get out. We were getting framed... Peter faked his own death, Sin. He's here. At Hogwarts, as the Weasley's pet rat."
She lay quietly in his arms for a moment, looking at the ceiling, then looked in his eyes.
"So how are we going to kill him?"