Thanks to those who have followed and reviewed! Here's some Clabastian ) (this chapter will feature incest so just a warning! I think to those who do not wish to read that I will upload two chapters tonight, one with incest one without. Enjoy!

All characters belong to Cassandra Clare =]

"Where is Jace?"

Sebastian glanced up from his book and rested his eyes on his sister. She was standing in the doorway in nothing but a silky nightdress that barely covered her underwear, her arms crossed defensively.

"I sent him away to entertain himself." Sebastian said idly, turning a page in his book.

"Why?" Clary demanded curiously, "Where did you send him?"

Sighing heavily, Sebastian made a big show of marking his page and closing the book, setting it down on the table and getting to his feet, leaning back against the wall. He knew Clary was more desperate to know where her darling Jace was than she was showing, and he was going to tell her when he wanted. He would have told her anyway, but at his own accord, he was the one in charge here.

"He is allowed to do whatever he may wish as long as he stays away from here." Sebastian said at last, "I wanted to spend some quality time with my little sister."

As he looked her up and down he couldn't help but dab at his lips with his tongue, smiling appreciatively at her choice of clothing. So much of her pale, creamy skin was exposed and with her flame of red her hanging tousled over one shoulder she looked so desirable, so heavenly. He saw her shudder at his words and appreciated it greatly, he liked knowing that she almost feared him, that she was frightened of the power he held over her, because he was her big brother and she was his property, he could do whatever he wanted and she would have to deal with it. Taking his sweet time, Sebastian started to walk towards Clary with such a pace she could be overwhelmed in anticipation, worrying about what would happen next. When he came to a stop right in front of her, he leaned down to whisper in her ear, "We're going to have a whole lot of fun, Clarissa."

When he stepped back he could see goosebumps had erupted over her skin at the feel of his breath on her neck, his closeness made the hairs on the back of her arms stand up on edge. Smirking again, he reached out a hand and let his fingers touch her collar bone, just the tips of them brushing gently by the thin strap of her nightdress. He heard her sharp intake of breath and smiled, "Do I make you nervous?"

She said nothing, just flinched her head back, trying to get far away from him as subtly as she could, but Sebastian missed nothing. He trailed his fingers to her forearm and tightened his grip there, pulling her towards him so that her chest was touching the muscle just below his own chest, she was so short. "Do I make you squirm?" he continued, massaging her arm, he thought he could actually feel her heartbeat there.

"I know you think about me, Clarissa." Sebastian breathed, not caring much that she was not speaking back to him. "I think about you all the time. The feel of your skin, the smell of your hair, the green of your eyes."

Like she was going to do anything to deny him what he desired, Clary closed her eyes so he couldn't see the emerald irises, her fair lashes tickling just below her eye. Sebastian moved closer to her again, once more he bent down to whisper in her ear making sure that his words would tickle at her goosebumps. "I know you will do anything to protect the ones you love."

She flinched again, and Sebastian smiled. He moved with careful slowness then, moving his head so that his lips brushed against her shoulder blades.

"Don't touch me, Sebastian." Clary mumbled, her voice wavered with nerves.

"Oh, but I will touch you, Clarissa. Because you are mine."

"I will not let you." Clary told him, her eyes flying open again.

Sebastian tutted, looking down at her, returning her gaze with anger in his black eyes. "I didn't want to have to show you this, Clary." He said.

"Show me what?"

He gripped her wrist with his fingers and pulled her from the room, leading her into another room she had never been in. It was empty apart from a wall of different screens of various televisions and tablets, and two big, comfortable looking swivel chairs. Still gripping her wrist, he pulled her and shoved her roughly down into the chair on the right, and he sank down into the one beside her. She was looking at him sideways as he leaned forwards, turning one of the screens on. He didn't look at her but heard her gasp. The screen was showing a live videoing of their mother Jocelyn, laying asleep in a bedroom at Magnus Bane's house.

"If you don't do as I ask of you, Clarissa, I have a demon there in that room who I can easily order to kill her painfully."

Clary gulped loudly, "I don't see a demon."

As if it was hearing her speak and it probably was somehow, for Sebastian to have complete power to make it kill Jocelyn, the demon moved into view and Clary squeezed her eyes shut.

"You would not hurt our mother." She said, but it sounded more like she was promising herself that.

Sebastian smiled, "You'd like to think that, wouldn't you?" Then he said something in another language, it sounded like latin, and the hideous demon moved to stand right over Clary's mother, it' was taking the form of a human but when it lifted it's hand, there was something that looked like tendrils hanging from his hand. Clary shook her head, "Make it stop. Okay, I'll do whatever you want."

Sebastian swivelled his chair round and did the same to hers so that they were facing one another, and he lifted a hand to cup her pointed chin. "I knew you would say that, because you love almost as passionately as I myself do."

Clary snorted, "Yeah, like you love anything."

Sebastian looked almost hurt, "I love you, Clary. That's why I can't wait to spend the rest of this day with you."

Clary's eyes widened with horror, and Sebastian chuckled. "Come on then, my darling Clarissa, let's go upstairs."

He didn't wait for her to say anything, and he didn't even let her walk despite her grumbled protest, he lifted her up like she was a princess and looked into her eyes again, smiling at her lovingly. "I do love you Clary." He said again, and then they left the screen room and he carried her up to his bedroom. As he held her he could feel the terrified heartbeat in her chest and he liked feeling it, he felt so close to her, as close as they should have been able to be for their entire lives.

He lay her down on the bed and didn't waste any time in joining her. He was lying on his side beside her, and he moved her carefully so that they were spooning one another. He lifted her hair out the way and began to kiss her skin, so gently because she seemed so delicate. He felt her shudder and breathed against her skin, "Relax, Clarissa. I'm going to treat you so well."

He continued to kiss her neck for a long time, deliberately leaving big purple bruises there for Jace and the world to see, so everybody would know she was his. Lifting his hand he then pulled her dress strap down at snail pace, trailing his fingers down her shoulder whilst still suckling at her neck. Clary gasped loudly and at the moment he knew she was enjoying it too, because if he made her feel good then she wouldn't be able to control her desires anymore, she would forget she was being treated like a queen by her brother.

"You're so beautiful, Clarissa." He mumbled, moving his hand from her arm and down to the hem of her dress. Through the silky fabric and the material of her underwear he massaged her clit with graceful circlular patterns and she let out a very low moan, instantly biting her lip to hold it in, regretting it. "I can't wait to be inside of you."

"Sebastian..." Clary murmured like she was about to protest, but then she must have though about her mother and the demon and said nothing, so it sounded like she was simply enjoying him and his company.

"I'm so lucky to have you as a sister, I can think of no finger person to own."

Clary shut her eyes, and ever so carefully Sebastian shifted her so she was lying on her back and he straddled his legs across her. He bent down to continue kissing her neck, and he moved his hand back to her clit and felt how wet she was when he dipped his hand under the silk. His kisses moved from her neck to her chest, and then he was suddenly tearing the dress off of her body, not caring that he ripped it. Underneath Clary was wearing lace underwear to Sebastian's pleasure. His fingers caressed the skin of her breasts and then trailed down to flutter around her belly button. Shifting backwards, he kissed the porcelain flesh around her knickers so tenderly... still taking such slow, careful grace, he started to pull the lace knickers down her legs, following them all the way down and leaving purple love bites up and down her legs. When he moved back up he started kissing her inner thighs, brushing his lips against the lips of her pussy. Clary let out a very faint groan and Sebastian smiled, poking his tongue out. He started licking her out, and Clary's hips buckled, her fingers clawing as she gripped the sheet of his bed like she was fighting it from tossing her off. As he devoured the juices that leaked from her pussy he smiled, and his tongue started to speed up like he was a dog lapping at her. Clary's moans had grown louder, and she kept quietly whispering "Se...Seb...Sebastian. Sebastian! Seb..."

Keeping his face buried in her female treasures he asked, "Are you ready for me to be inside of you, little sister?"

Clary hesitated but she knew she had to do whatever he wanted... "If you are ready, Sebastian."

He pulled his tongue away from her and he moved to hover above her, his arms supporting him as he balanced directly above her, eyes shining dark. Clary's eyelids were fluttering like he was sensational... she was probably trying to fight it but even Clary couldn't conceal her sexual desires. Lowering himself into her, Sebastian buried his face against her neck. She groaned again as he pushed himself into her. He knew she hadn't done it before so he was careful at first, but she still let out small moans of pain. Once he had gone as far as he wanted, he pulled out slowly, and Clary exhaled in relief. Then he thrusted back into her, and she growled. He pulled out, and then went back in... out, in, out. The whole time he was speaking to her.

"Oh sister, oh Clarissa my dearest sister..."

Clary wished he would stop calling her sister it might have made it easier for her to enjoy it, she didn't want to be enjoying it but she couldn't help it, however while she was pleasuring in the feeling she had to keep reminding herself this was her brother.

"I need to come." He breathed against her skin and again it erupted with goosebumps. "I'm going to come inside of you and then we will really... be... as... one."

She said nothing, just arched her back in the anticipation, her eyes going to the back of her head and fluttering there. As Sebastian came inside of her he smiled lazily, grunting as he pulled out of her. He didn't let her put her clothes back on, he held her against his chest as he curled his body around hers, admiring all the marks he had left on her skin.

"I love you little sister." He smiled.

Hope that was okay for y'all! Review and let me know what other pairings you would like to read, thank you for viewing my story!