Flame to the Fyre Chronicles #1: Black Blood

Sinia sat at the desk in her quarters, quill arched over a piece of parchment. She attempted to draw her thoughts into one base paragraph, for the sake of writing. It was her own personal way of keeping her head clear.

Basic questions are being asked again, she began. Questions of loyalty, questions of actions. I can only tell them so many times that I do not know what Sirius was up to the week before... it still hurts to much to say. And knowing his character, it makes no sense that he would have given over anything about either party. I remember he and James having long, drawn out arguments on the subject. He refused, point- blank, to be their secret keeper on a grounded basis. He was even more adamant that I was not to be involved in the whole thing. They discussed the possibility of my staying with James and Lily

A scratch at the door jerked her out of her thoughts. "Come in," she growled slightly, returning to her writing.

which was hardly a reasonable option then, and certainly more dangerous. The only story, thesis, or random guess I can make that coincides with what I know is that Sirius, in the end, was never the secret keeper at all. But then, who?

Sinia stiffened as she felt a pair of eyes boring into her back. It was an uncomfortable sensation. Probably Snape, she mentally growled as she reached backward to massage her aching neck.
"Well?" she asked quietly, not bothering to look behind her.
No vocalized reply came, only the sound of heavy footsteps moving from her doorway to her desk, and the light click of the door swinging shut. She feigned disinterest, her intuition screaming for her to be on her guard. The footsteps stopped dead behind her, and a smell, definitively male, eerily familiar, drifted through the room.
Not Snape.
She felt the hands on her temples in a moment, pulling her head backward. The touch wasn't rough, but insistent, and before she had a moment to speak, he kissed her. His hands meandered their way down her neck and to her shoulders, and would have gone lower, had she not taken that moment to swing the chair around and stand, nearly toppling him off of his feet.
"Sirius?" It was a whisper, it was a question, it was a prayer. He walked up to her, taking her head in his hands, letting those hands wander back into her hair, drawing her to him. He kissed her again, more gently this time, slowly pulling away as though to take her bottom lip with him. She wrapped her arms around his neck and leaned back in, refusing to end it on his terms. Her tongue traced across the roof of his mouth and back down to his lower teeth, causing him to catch his breath. He pulled away slowly, though not far. He was so close, in fact, that their lips still touched slightly, his forehead resting against hers, their noses side by side.
"Please tell me," his breath against her skin was electric, "that if I were to carry you into that bedroom, there wouldn't be another soul waiting for you?"
"I haven't slept with a man in twelve years, Sirius."
"Nor a woman?"
"Nor a woman."
He kissed her again, forcefully, running his hands down her back and to her waist, lingering there momentarily, then gripping her ass and heaving her upwards. She wrapped her legs around his waist in compliance, gripping his shoulders firmly. With practiced ease, he walked into the bedroom and flung her on the simple four poster, not even giving her time to catch her breath before he was on top of her, his lips grazing her jaw and down her neck, nipping lightly at odd intervals towards her collarbone. Slowly, he brought his face back up to hers, smiling quietly at the lust in her eyes.
"Did you think I'd forgotten?" he whispered seductively, one hand running along the side of her breast down to her hip. "Or did you?" The hand traced its way back up to her chest, and quickly undid the buttons of her blouse.
"Forget what?" she replied, rolling over so she was on top of him, kissing him soundly on the mouth. "This?" She traced her lips across his cheekbone till she was at his ear, tracing her tongue down the outer ridge and nipping lightly on his earlobe. He sat up underneath of her and pulled the shirt off of her shoulders, running his fingers across her shoulders and her upper arms in a feather light touch, roughening as his hands reached down her chest, then lightening as he reached her stomach. Around her sides and up her back, unclasping the bra, reaching around the wings he knew were there, but couldn't see. Sinia whimpered as his lips brushed over her breasts, dragging his teeth along her nipples before going to her stomach, alternating sharp bites with feather- light kisses. He listened carefully, making sure to try all the old spots, and most of them still worked- quite well. He made his way back up her chest and neck to her lips, where she deftly flung off his robes. He chuckled quietly, the vibrations ringing through her lips and across her body. He balanced precariously on one hand while unzipping her jeans slowly with the other. He chuckled once more.
"It could take all night to get these off."
"You try it," her eyes were glazed with lust, "and I will string you up by your hair in the morning."
He grinned, kissing her brutally and tearing the pants off. Skin against skin, sweat against sweat... his mind could not catch up with his groin until he'd thrust and heard her gasp slightly, looking her in the eyes. The deep, silver- gray irises were hypnotizing, her eyes widened in shock, and for that moment the world seemed to spin slowly beneath them. Sirius continued in the pace he had set, leaving Sinia in whimpers, her nails clawing into his shoulders, her eyes boring into his soul.
"PETER! You MOTHER FUCKING-"
White mist enclosed his peripheral vision, and he surrendered to the sensation that had tainted his sex life for twenty years.
"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?"
The smile played. "What, you could do better?"
"Sirius, she isn't stupid, you need to quit screwing around-"
"Get out of my house!"
"I swear, no one will touch you, no one will hurt you, nothing will dare trouble you while I'm here."
"Thank you for coming, everyone. It's good to see friends... but I'd recommend you leave before the Ministry Aurors stampede in..."
"Let go of me! No! NO! SIRIUS!"
"SINIA!" he felt himself scream with her, in release, in pain, in his own mind once more, holding the one woman he had loved all his days in his arms, and for the first time, saw how old she had become.
"You know," she stated, snuggling next to him under the covers.
"I'm not leaving again," he stated.
"Don't make promises you cannot keep," she whispered, looking in his eyes. "Sleep. We'll handle this in the morning."