AN: I'M SO SORRY FOR THE MASSIVE WAIT, YOU GUYS. D: But yeah, I'm back now. You may have noticed that the rating up there has went from T to M. You know what that means people! Oh, and this is my first time ever writing this sort of thing, so don't be too harsh :) Sorry if you don't like this, but I wrote it anyway :P Enjoy ;)

Disclaimer: I don't own anything to do with the Mortal Instruments etcetera etcetera...

Maryse hadn't been kidding when she'd said that they were getting up early. At seven o'clock sharp she was almost dragging a grumbling Alec from his bed, before leaving to wake up Isabelle. Thanks, Jace silently told the Angel, relieved that he wouldn't be joining the Lightwoods doing whatever the hell it was they were doing at this time. Maryse had tried to move about the house quietly, but the point was lost when Isabelle started screaming at her.

"I want to go back to bed!" Jace, who had half fallen to sleep again, jerked awake. He looked across the room at his parabatai's empty bed and sighed. Half of him was glad Alec wasn't there to ask about his messed up feelings, but the other half wished he was still here, even just for the reassurance that there was someone who didn't think he was some sort of freak.

Jace shut his eyes as Isabelle went stomping past his room. As her footsteps faded away, someone else's appeared. Jace prised open his eyes again as Maryse poked her head round the door. "That's us leaving now, Jace. If you need anything, the Penhallows are staying here."

"Thanks." Jace yawned, rubbing sleep out of his eyes. Then he sat bolt upright. "Wait, all of them?" Maryse looked surprised at the urgency of his tone.

"Well, Patrick's going out for a while, but he won't be gone long. Sebastian isn't here, and I have no idea where he's gone. Aline and her mother are still asleep." Maryse looked puzzled, but glanced at her watch.

"Right. See you later," Jace said quickly, secretly flooded with relief. Sebastian was out. How could he stalk Jace if he wasn't even here? He smiled at Maryse and she left Jace alone in the dark. He could get some sleep. Yes, that would be good. Going out meant he might run into someone he'd rather not see. Like Clary. But what bothered him even more was the thought of running into Sebastian. Worried, Jace started to try and figure when he'd started caring more about the boy than his sister. Jace hated being worried, so quickly pushed the thoughts from his mind. He shifted his weight, trying for a comfortable position.

But, seized by a sudden fit of paranoia, Jace threw his covers off and strode to the bedroom door. His hands fumbled in the dark, until they found the key sticking out of the lock. Jace twisted his wrist, the lock giving a satisfying click. He made sure he left the key in the lock horizontally so it couldn't be pushed out from the other side. By the Angel, he was overreacting. Jace knew it, but he didn't care. He half-smiled at his own silliness, but still, he felt more relaxed now. He punched his pillow to get it into a comfy shape and settled down. At least he could sleep in peace.

"You look hot when you sleep."

Jace had been sleeping in peace. For about fifteen minutes, which was long as Sebastian could be bothered waiting. Now Jace scrambled into an upright position, his heart skipping a beat. He peered into the darkness, disorientated. Then Jace caught a flash of white teeth when Sebastian grinned at him. And he couldn't deny that his heart fluttered a little. Angel, what was happening to him?

Suddenly, Jace whipped his head around to look at the door. The key was still in the same position he'd left it in. His forehead creased in confusion. Surely Sebastian hadn't climbed through the window? He was on the the third floor! Jace looked at the large window and scrutinised it, but couldn't see any differences from when he'd last looked. Sebastian caught him staring.

"Oh, yeah. I came through the window," he said, as if it was the most normal thing in the world to do. When Jace snorted in disbelief, he shrugged. "Oh, come on. We're Shadowhunters, right? No big deal."

That was when Sebastian casually rose from his seat on Alec's bed and started moving towards Jace. As he got nearer, Jace was momentarily distracted.

"You're bleeding."

Sebastian automatically looked down at his hand. Blood was trickling down from underneath his sleeve, dripping onto the floorboards. Sebastian looked slightly taken aback, as if he hadn't noticed. He rolled up the arm of his black shirt. Jace took a sharp breath through his teeth. There wasn't a cut like he'd expected, but a burn, just beneath his elbow. About the area of skin the palm of his hand would cover, Sebastian's arm was hideous. It wasn't a normal burn. The edges were a deep red, and towards the centre it turned black. The flesh was oozing blood that was strangely dark, but that was probably just the lack of light.

"Oh," Sebastian breathed out. He looked up at Jace through his lashes. "Don't tell anyone about this."

"Why the hell shouldn't I?" Jace demanded without thinking.

"Because I said so." Sebastian's voice was low, final. Anger flashed in his eyes, and Jace decided to let him win this time. He swept back his covers once again, and was suddenly horrified that he was wearing his old holey pyjamas. But Sebastian was staring, hypnotised, at the wound on his arm. He let his fingers hover near it, but didn't touch it. Jace went to his rucksack he kept at the foot of his bed, and rummaged through it until he came across his stele.

"Come here, into the light," Jace said, keeping focused on the disgusting burn so that he wouldn't think about things that would, ah, have embarrassing consequences. He moved to the window so the pale morning light gave him a clearer view of what he was doing. Sebastian moved close to him- closer than was necessary, to be honest- and held up his arm. He wasn't looking at it anymore, but was focused on Jace's face. His eyes held that darkness that Jace knew so well, even if Jace didn't want to admit it.

Jace gripped Sebastian's wrist to hold his arm steady, while he positioned his stele to draw an iratze. Without meaning to, Jace brushed his fingers against the burn. He made a noise of surprise.

"It's cold," he said in confusion. He hesitantly touched it again. The damaged skin was freezing. Jace felt suspicion begin to bubble up in his stomach. He looked Sebastian right in the eyes. "That's a magic burn. Only a warlock can do that. And a warlock will only do that if they are extremely pissed off."

Sebastian's expression didn't change in the slightest. "I asked you not to tell anyone about this. Please, Jace?"

That was all he had to say. "Okay." Jace swallowed. The amount of power the black-haired boy had over him scared him. He brought the sharp tip of the stele down on his arm and, with a few quick flicks of his wrist, the healing rune was complete. Jace wondered how Sebastian didn't react to the pain of either the burning of the magic or the burning of the stele.

Jace tossed his stele back into his backpack. He realised he was still holding on to Sebastian's arm and let go, heat rushing to his face. Jace started to back away, but Sebastian matched his pace. He grinned again, his quick breaths washing over Jace's face.

"Where do you think you're going?" If anyone else had said the words like that, it would have seemed playful; but with the look on Sebastian's face it seemed downright predatory. Jace held his breath when the backs of his legs hit the edge on his bed. He had a strong sense of déjà vu. The memory of the last time raced through Jace's mind and while he was preoccupied, Sebastian shoved him over.

The breath Jace had been holding was knocked out of him as the springs protested underneath him. He struggled to get back up, but Sebastian straddled his waist and braced his hands on his chest. The black-haired boy was grinning like a maniac, breath coming very heavy. He leaned down until his face was just inches from Jace's.

"You know how long I've wanted to do this?" He asked huskily, staring greedily into Jace's eyes. The latter shook his head quickly, not trusting himself to speak. "Since the first time I saw you."

Oh, Angel. The situation was so alien to him that he didn't know what do to; he, Jace Wayland, was out of his depth. Where was his charm, his witty comments? Why was he doing this? Jace wasn't submissive. Jace didn't like boys. But he wanted this so bad, he couldn't stop himself if he tried.

"Oh, Jace," Sebastian breathed, and Jace was blown away by how much his name on Sebastian's lips affected him. "I'm going to fuck you so hard."

That was when he kissed Jace. Only it was less kissing and more smashing their faces together. Sebastian grabbed Jace's hair and tugged at it so tightly that tears came to Jace's eyes. He managed to keep silent. Sebastian bit Jace's lip hard enough to draw blood. Jace moaned and opened his mouth to allow Sebastian's tongue entrance, but Sebastian had abandoned Jace's lips and was roughly kissing his way down his jaw, then to his neck. Sebastian explored the skin there until he found a spot just above Jace's collarbone that made the blonde writhe beneath him. He licked his way along one of Jace's permanent Marks, before leaving one of his own, less permanent ones next to it.

Jace couldn't help himself anymore. He groaned deep in his throat and bucked his hips against Sebastian's, who groaned back at him. Both boys could feel the other's arousal through their trousers. Jace wished he was wearing something other than pyjamas. Actually, he wished he was wearing nothing at all. When Sebastian leaned back, Jace growled in protest, holding onto the hem of Sebastian's shirt.

"I think you're forgetting what Alec told us," Sebastian said, laughing slightly. Jace tried to concentrate on what Alec had said, but it was proving to be difficult to focus on anything other than the rocking motion that Sebastian had started making against his erection. Alec... had said...

"Um..." Jace tried to keep himself from panting. The last time they'd been here, Alec had found them. And he'd said to use Sebastian's room. Yes, that was it. Jace's breath froze in his chest. What was Sebastian saying? Use his room for what? Oh, no. Not that. Oh, Angel. Jace wasn't ready for that. Was he? He didn't want to! Well, he did, but he decided to keep that to himself.

"What if I don't want to?" Jace asked, trying to sound in control of the situation. Sebastian smiled down at him.

"That's okay," he said fairly, shocking Jace. He looked up at the ceiling, as if in deep thought. "I'm sure I'll enjoy it just the same."

Jace's eyes widened. "What are you going to do? Rape me?"

"If that's what I have to do." Sebastian stared at him mercilessly. "But I won't have to. You want me, don't you, Jace?"

"Maybe," Jace said too fast, sounding like a complete idiot. Sebastian rolled his eyes.

"I know you do." To back up his point, Sebastian looked down at his and Jace's groins pressed tightly against each other. Sebastian jerked his hips to the side, and the wonderful friction made Jace gasp. He flicked his eyes back up to meet Jace's, and gave him a cocky smile. "Deny it now."

"I- I want-" Jace bit his lip to stop himself from saying something incredibly stupid. But Sebastian's eyes glinted excitedly.

"What was that, Jace?" He asked tauntingly. "I didn't quite hear you."

Jace shook his head. He gritted his teeth and struggled to escape from beneath the heavier boy. To his surprise, Sebastian moved to let him out. He scrambled away. Jace looked down surreptitiously. Ah, shit. His hard member was embarrassingly obvious, wearing just his baggy trousers. He tried to turn his back to Sebastian, but the latter just came up behind him and slipped his arms around Jace's waist. He stood flush against him, and Jace's heart stuttered when he felt Sebastian's erection pressing against his ass. Sebastian's lips found Jace's ear and he nibbled at his lobe.

"I don't care what you say, Jace. You're coming with me," he whispered, breath hot in Jace's ear, making him shiver. Jace swallowed. He tried to find a way out of this. He could always fight Sebastian, but then he'd have to explain to everyone. I'm sorry Patrick, but your nephew said he was going to rape me. He could never say that. "You can either come willingly or I can drag you the whole way. So, you going to come with me?"

"Yeah," Jace said croakily, licking his lips in anticipation. His heart was going a million miles an hour. He didn't know why he was so scared. He'd never had sex with a guy, never thought about it, but he wasn't a virgin. He knew what to do. Maybe it was just because he'd always been the dominant one before. But now Sebastian was that one. Sebastian paused in his movements, like he was surprised at Jace's answer, but then he buried his face in Jace's neck and Jace felt Sebastian smile against his skin. He didn't answer, but took Jace by the arm and pulled him to the door. Jace heard it unlock, and then he was being wrenched from his room. Sebastian all but dragged him down the stairs and along a corridor to his bedroom. Jace silently thanked the Angel that they met no-one on their way. God knows what they would think. Jace would die of mortification.

And then he was being hauled into a dark room and thrown onto a soft bed. Jace tried to get a view of Sebastian's room but his vision was obscured when Sebastian pounced on him. His head was pushed into the pillows and Sebastian leaned down to his face again.

"I think we were about here." Sebastian looked into Jace's eyes and gave a breathy laugh. He didn't go down and kiss Jace (which made Jace quite disappointed). Instead, Sebastian sat up straight and examined Jace's torso. He tilted his head to the side before gripping the hem of Jace's old T-shirt and pulling it up. Jace arched his back so it would come off easier, and Sebastian tugged the material over his head and tossed it behind him without a second glance. Sebastian glanced at Jace's red face before starting to trail his cool fingers up and down Jace's body. Then he leaned back down and bit Jace's neck, just where he liked it. Jace bit his lip to stop the moan escaping. Then Sebastian moved down to Jace's collarbone, and down his chest, pausing in his path to suck at a hard nipple. Jace couldn't stop his moan this time, and he arched his back into Sebastian.

Then Sebastian continued his descent, until he reached the waistband of Jace's trousers. He stopped, and leaned back up so he could watch Jace's face. Then slowly, tantalisingly traced his fingers along his hard abs, the indentations at his hips, before dipping his fingers just under the line of material, and then repeating the process. Each time he did it, Jace's breathing got heavier. Sebastian held back a smirk at the frustrated look on Jace's face. Jace was squirming beneath him, trying to get Sebastian to move his hands lower.

When Sebastian's hands stopped moving, Jace looked down. Sebastian was quickly unbuttoning his own shirt. He pulled it off and threw it next to Jace's T-shirt on the floor. While he was busy unbuckling his belt, Jace was staring unashamedly at his body. The first things you noticed were his Marks, but underneath them he was solid and well-muscled. A small voice at the back of his head reminded him that, for a Shadowhunter, Sebastian's body was about average. Shut up, Jace told the voice. He stopped staring at Sebastian's abs when he thrust his jeans down. Sebastian stood up and kicked off his boots and jeans, leaving him in just his boxers.

Sebastian crawled onto the bed beside Jace and, with no warning, yanked his trousers down. Jace tried to concentrate on the relieving feeling of cool air washing around his nether regions, because he couldn't stand the thought of Sebastian staring at him. When he snuck a glance at Sebastian's face, he found the other boy watching his face. He smirked.

"Not bad, I guess." Jace hoped that was a compliment. Before Sebastian said anything else, he pulled his own boxers off and sighed in relief. Jace couldn't help but stare. Damn, he was big. As in about eight inches long and quite thick too. Jace's eyes widened. Angel. He's going to be inside me. Sebastian grinned, only it looked more like baring his teeth.

Sebastian lay on top of Jace, and pressed his lips against the blonde boy's. Jace moaned into Sebastian's mouth, who grinded down against Jace. They were both making noise now, revelling in the skin on skin contact. Their sweat made it easy for their bodies to slide against each other. Their hands were never stopping, always exploring. Jace kept one hand at the back of Sebastian's neck and, with his other, dragged his nails down the heavier boy's spine. Sebastian gave a particularly loud groan to that. He broke away and Jace moaned in protest.

Sebastian replaced his mouth with his fingers, pressing them against Jace's swollen lips. Jace slowly opened his mouth and Sebastian slid them inside. Jace sucked on each one of them and traced them with his tongue, getting them nice and wet. Sebastian deemed them wet enough and Jace released them. Sebastian scooted down the bed and used his dry hand to move Jace's thighs apart, then positioned himself between Jace's spread legs.

Jace kept his head pushed back against the pillows. He was eager and scared and excited all at once. His hands were trembling, and he brought one up and dragged it through his hair, making it stick up all over the place. He felt Sebastian slide his fingers along his ass. His breath was coming in short gasps. When Sebastian found his entrance, Jace held his breath. A finger lightly probed the tight hole, before slowly pushing in. Jace moaned, but this time it wasn't in pleasure. Shit, that hurt. Sebastian slid his finger out nearly all the way, before forcing it back inside Jace. After a few more times the pain started to fade a little, but it still felt more awkward than anything else. He squirmed in discomfort, trying to keep quiet.

Just as it was starting to feel better, Sebastian added a second finger. Jace groaned in frustration. He probed and spread his fingers, and then Sebastian apparently decided he couldn't be bothered waiting any longer, because he quickly added a third finger. After a few moments, Sebastian's fingers left Jace completely.

"Sit up," said Sebastian breathlessly. Jace did warily. Sebastian was lightly rubbing his hand up and down his shaft, eyes half closed. Jace was staring like an idiot. Damn, that was hot. Sebastian noticed that Jace had sat up and then he lay down. Jace stared at him sprawled out on the bed uncomprehendingly. Sebastian rolled his eyes impatiently. "Blow me, idiot."

Jace's breath froze. Hell no. "I- I don't, uh-do what?"

"You so know what I mean." Sebastian stared at him, waiting expectantly. Jace felt heat spreading through his cheeks. Of course he knew what he meant. Just because he'd had a blow job before didn't mean he knew how to give one. At least, not a proper one. "Look, I don't care if you're crap at it, just do it."

Jace leaned down until he was hovering over Sebastian's crotch, using his right hand to support his weight. He brought his left hand to the base of Sebastian's member and held it upright. Jace licked his lips nervously. Sebastian was completely silent above him. Jace wondered if he was actually holding his breath. Then he slowly lowered his head until his face was just centimetres from the tip. Jace's eyes flickered up and met Sebastian's.

Jace stuck out his tongue and experimentally traced his tongue around the head. Sebastian shifted slightly, like he wanted to thrust his hips forward but was restraining himself. Jace moved his tongue to the side and licked his way down Sebastian's shaft and back up. From the corner of his eye, Jace could see the other boy's fingers digging into the sheets. Then, slowly, he slid his mouth over Sebastian's head and as far down his shaft as he could get without gagging. After accidentally biting him and being swore at, Jace thought he had a pretty good rhythm going, judging by the noises coming from Sebastian's mouth. He started to increase his pace, all the while keeping Sebastian's eye contact. Soon, Jace had moved his hand to gently massage Sebastian's balls. Jace could taste his precome, and kept it up until Sebastian started to protest.

"No, stop, stop, I'm gonna come," he panted desperately. Jace gave his member one last suck before sitting up straight. He barely had time to wipe the saliva from his lips before Sebastian was forcing him onto his back. Jace's heart was beating out of control, but he was so turned on he didn't even try to hide it. Sebastian hovered over him, using one arm to support himself and the other to position his member at Jace's entrance. Jace spread his legs, knees in the air. He felt Sebastian pressing the blunt tip against his ass, and then he looked at the blonde, his eyes darkened with lust. Jace knew his must have looked the same.

Without breaking eye contact, Sebastian thrust his hips forward in one swift motion. Jace gritted his teeth against the pain and focused on the fact that Sebastian was moaning his name. After shifting awkwardly for a few moments, Sebastian braced both his hands on either side of Jace's head and gave him a sloppy kiss. After Jace had mostly adjusted to the feeling of Sebastian inside him, the latter started to move. He slowly slid out, before quickly thrusting back into Jace, their skin making a slapping noise when they hit each other. Jace was concentrating on the growing sense of pleasure rather than the pain, but when Sebastian jerked inside him and hit his prostate, he couldn't even remember what the pain had felt like. He yelled Sebastian's name, and the dark-haired boy knew to hit that spot every time, making Jace spasm in bliss.

Sebastian was slamming into Jace now, and plastering him with hot, rough kisses. Jace was digging his nails into Sebastian's back, and he couldn't tell if the wetness was just sweat or if he'd drawn blood. Jace couldn't hold back his shouts, and Sebastian wasn't any quieter. The chances of no-one hearing them were slim to none. Jace didn't care. As both of them neared climax, Sebastian reached between their bodies and started pumping Jace's aching member in time to the thrusts he was making. That was enough for Jace. Sebastian barely had to repeat the action three times before Jace came, throwing his head back on the pillow with a yell of ecstasy, and they both felt the stickiness of his come splattered on their torsos. Sebastian came not five seconds after Jace, still inside him and shouting his name. He rode out his orgasm while Jace was still shuddering from his own. He quickly slid out of Jace before his arms buckled and he collapsed on top of the blonde, whose chest was heaving.

They didn't move until both had their breathing back to a normal rate. Then Sebastian propped himself up on his elbows and met Jace's eyes. His hair was plastered to his forehead, his pale face was flushed and, up this close, Jace could see that Sebastian's eyes weren't just black, but specked with dark brown. Jace kept quiet. He was having a hard time thinking of something to say, mostly just thinking oh shit, oh shit, oh shit... Then Sebastian grinned at him.

"I knew you wanted me," he said arrogantly, voice still a little uneven.

"Well, I definitely wanted something." Jace could only concentrate on the fact that they were both still naked and their bodies still pressed together. Light was starting to flood in between the gap in the curtains. Alec would probably be back soon. Jace's stomach lurched. Oh, Angel. Why hadn't he tried to keep quiet? Jace pushed Sebastian off him and wouldn't meet his eyes. What the hell had he just done? He sat up and winced when he noticed the almost-dry whiteness on his front. He quickly stood up, his body stiff, and moved across the room to where Sebastian had dumped his clothes, trying to ignore the fact that Sebastian was staring at him.

Jace pulled his clothes on hurriedly, grimacing when they clung to his sweaty body. He went to the door and unlocked it, but instead of running out like he'd planned, he froze. Against his will, he turned and looked back at Sebastian still lying on his bed. If he was pissed about Jace's sudden departure, he didn't show it. His face was expressionless.

"You'll want to shower before someone sees you."

Jace cleared his throat. "Yeah." He stared at Sebastian. What was he supposed to say? "Uh, thanks," he blurted out.

Sebastian smirked at him, eyes sparking with amusement. "Any time. I mean it."

Jace fled the room before he could ask if any time meant right now.

AN: ... review? :| You know, if everyone who favourited this or added it to their story alerts reviewed on this, I would just about die of happiness. Even just one word. It takes less than thirty seconds. Well, thanks for reading anyway :)

I was going to split this in two because it was kind of long. Oh well. I couldn't find a decent place to cut it.

PS If I posted a Jalec story would any of you read it? :S