Okay so I don't own the mortal instruments props to Cassandra Clare. This is my first Mortal instruments fan fiction and my first lemons one so leave me a review and let me know what you think :)

He hadn't expected her to be there, he'd thought she'd gone home after her long day of training with Isabelle since Isabelle had insisted she could do a better job then Jace could when it came to training Clary to become a shadow hunter. Not wanting to fight about it he'd given up rather quickly agreeing to split Clary's time equally between the two of them.

He walked to the edge of the bed and looked at Clary's sleeping form, her arms were underneath the pillow, and she was only wearing from what he could tell were her underwear and his white t-shirt. He and Clary had never done anything beyond extremely heated making out, she was always too shy to go any farther than that and he had respected her wishes to wait but sometimes she'd grind her small hips against him while they kissed making the temptation too great and he'd been forced to stop the kiss. Seeing her in nothing but her small black lace panties and his shirt pulled just above her waist line revealing a flat stomach drove him crazy.

He reached over to her and brushed a strand of her red hair away from her delicate face before removing the shirt he'd been wearing and his pants, wearing nothing but his boxers he pulled the covers aside and climbed in beside Clary.

She was facing away from him and he was still wide awake from his training so there was nothing for him to do but take in her small form. Her hips had gotten curvier and the training had done wonders for her ass, filling it out and giving it a rounder, plumper shape. His hands began to itch as he imagined running them along the soft flesh and making her moan with desire.

His gaze traveled upwards to the little dimples on her lower back that he wanted to kiss, she moaned quietly in her sleep making his member twitch slightly. Damnit he thought to himself trying to think of something else, like training, throwing knives and doing rolls, then his mind wandered to training with Clary and the way she'd smile triumphantly at him when she finally mastered something.

He stopped that thought before he went too far and started undressing her in his mind. He focused on his breathing and slicing demons in half until finally the throbbing hidden beneath his boxers became bearable and had gone almost completely. When he'd finally calmed down and decided it would be a good time to try and sleep Clary rolled over so she was now facing him, the motion had not only pulled the shirt upwards even more but pulled it taught against her breasts making him suck in a breath.

He did as he'd done from the back unable to contain himself. He started at her long slender legs that she once wrapped around his hips causing him to moan into his pillow. He looked over again his gaze sliding up her milky thighs to her abdomen and he kept going until his eyes stopped at her breasts.

Her clothes were deceiving always making them look smaller than they really were, she looked to be about a B cup when she was in her shadow hunting gear but wearing nothing but his t-shirt he could see that she was most definitely a C and he also noticed she was cold by the way her nipple were erect and gently poking through the fabric.

He lifted his eyes to her sleeping face, her long eyelashes that brushed along her cheeks and her slightly curly red hair that fell lightly around her face, that was sprinkled with freckles. His gaze rested on her full pink lips that he desperately wanted to kiss and moan against but knew he wouldn't dare for the risk he'd make her think he was forcing her into something she wasn't ready for.

Suddenly her eyes started to slowly flutter open and he was looking into her beautiful irises.

"When did you come in?" She whispered to him her voice thick with sleep. He didn't answer just continued to look at her taking in her appearance, "Jace?" she asked. Something about the way she half whispered his name from across the bed made his heart jump and his member twitch back to life. "Is something wrong?" she asked sitting up her red hair falling over her shoulder as she propped herself up on her left forearm. "No nothings wrong I just missed you today" he answered trying not to let his shaky breathing become obvious.

Clary being more awake now took in Jace, he wasn't wearing a shirt so his long, arms which were corded with muscle from years of training were resting across his tight stomach, his abs contracting with every deep breath that he took. He wasn't wearing any pants and she let her eyes wander to the bulge that had appeared in his boxers, despite everything she found herself wanting to reach out and touch him there. She remembered once she was with Simon and his friends had been talking about what it was like to have an erection and do nothing about it, she also remembered them saying that's why their hands were always down their pants.

She bit her lip trying to resist the temptation and brought her eyes back to his. Jace however was not oblivious to the way Clary had taken in his lack of clothes and felt a smirk pull at his lips. He felt himself harden even more when she bit her lip and brought her eyes back up to meet his.

They sat like that looking at each other silently until Clary reached over and placed her right hand on Jace's cheek before lightly pressing her lips to his. The kiss was soft, tentative, but it was all Jace needed to completely lose himself.

He felt himself harden and twitch as Clary shifted so she was straddling him her hips hovering just above his. His hands left his stomach and started on the back of Clary's thighs then sliding up to her ass where he began to massage it and squeeze it gently unsure if Clary was okay with it. He grew more bold and lifted his hands from her round behind and worked his way up her hips to the hem of his shirt she still had on. Not sure if she was ready to take it off yet Jace instead continued his way up and under the shirt and grasped both of Clary's breast gently in his hands. He let his hands explore the area feeling every part of her chest and then decided to use his first finger and thumb and work her nipples between them, Clary let out a moan when he started to apply pressure eliciting a moan from his own throat and causing him to twitch again.

The throbbing between Clary's legs had grown uncomfortable and she felt like she needed pressure there now, but the way Jace skillfully moved his hands against her breast felt so good she wasn't ready for him to stop, she removed her hands from where they were tangled in his hair and sat back feeling the bulge in his pants pressed against her core, she reached down and pulled off her shirt throwing it to the side of the bed before gently grinding her hips against his causing him to moan loudly before she pressed her mouth to his again putting both her hands on his chest forcing him against the bed.

Surprised by her aggressiveness he moaned again his hands sliding back down her body.

He flipped them quickly so she was now on the bottom and his hard body was pressed against her his hands on either side of her head in an attempt to keep most of his weight off of her. She pulled him down to her again so they were kissing more desperately than they ever had before. Jace licked along the seam of her lips begging for entrance until she finally parted to lips allowing his tongue entrance, he sucked and flicked along her mouth and lips causing her to moan quietly which wasn't quite the sound Jace wanted, he wanted her gasping for air and screaming his name as he thrust his hard throbbing erection into her core.

The feeling in between Clary's legs gave no sign of leaving it was to the point that all she could think about was applying pressure no matter where she had to get it, she lifted her hips to Jaces letting him know it was okay and she was ready for this, but he knew he had to take it slowly or he'd ravage her.

He forced her hips back against the bed with his before he started rocking his throbbing cock against he core applying pressure when he went over her clit making her moan louder, he continued his humping motion until finally Clary couldn't take it anymore "please Jace" she whispered. He almost came hearing her say that, "please what Clary?" he asked deviously. Jace knew he was being mean but she had no idea what her voice was doing to him in this moment and he just needed to hear her say it, "please Jace" she whimpered "I want you inside of me".

He kissed her lips once more before he started trailing kisses down her jaw to her throat where he began to suck on her collar bone, he continued his decent to her chest where he sucked on her left nipple until it was erect, he then moved to the right while flicking the left with index finger making her moan and press herself against him again. Once both of her nipples were erect he moved his mouth across her abdomen to the waist band of her panties, he heard her suck in a breath as he took the hem in his teeth and began to pull them down past her legs and pulled them onto the floor.

Her legs were pulled together at this point, so kneeling at the foot of the bed Jace took one calf in either hand and gently pulled her legs apart revealing her center, dripping and wet just calling for him to taste it.

He knelt forward until he was just centimeters from her most sensitive area and he blew hot breath against her clit she groaned wrapping her slender fingers into the sheets. "Jace" she whined lifting her hips slightly. He finally extended his tongue and began to expertly lick from the bottom of her folds through the center where he swirled his tongue in a small circle before coming to her clit where he began to suck and tease it with his teeth. "Oh god Jace...pl-please harder" she moaned as he picked up the pace.

She started to move her hips in time with his stroking moving faster and faster as she neared her climax, Jace felt her whole body tense because she was about to come and at the last minute he pulled away licking his lips.

Clary was still in a daze her chest rising and falling rapidly as she tried to compose herself "why? Why did you stop?" she asked looking up into his brilliant eyes. "Not yet" he whispered in her ear and kissed her neck.

He pulled off his boxers exposing himself and he looked down at Clary. "Oh my that's a lot bigger than I thought" she gaped at his throbbing erection her hands tapping against her thighs. Slowly she lifted her left hand and reached out, she grasped him at the base causing his whole body to tense at the sudden contact, she slid her hand up and down the length slowly before picking up speed then she would go loose at the base and squeeze him tight near the head making him suck in a breath.

"Clary" he said his voice raspy, his eyes dark with desire. "I want you Clary" he said lifting her chin to kiss her hard slipping his tongue into her mouth.

He pressed himself onto her making her lie down so he was again over top of her, he placed himself at her entrance and looked her in the eyes "You ready?" he asked barely keeping himself from plunging inside of her. She nodded biting her lip nervously, taking a quick breath he pressed himself into her feeling her walls clench as he thrust deeper and deeper until he hit a small barrier.

"Clary this might hurt" Jace said quietly letting her make the decision. She looked down between their bodies then back at his angelic face "just be gentle" she whimpered before he pulled back and thrust into her hard. She let out a yelp and curled in on herself trying to shut her legs but was unable to with Jace positioned in between them.

"Shhh it'll be okay, just wait for a second and try not to move" he cooed from above her reaching his hand up to wipe a tear that slid down her pale cheeks.

After sitting inside of her for a minute she slowly moved her hips up towards him almost making him collapse on top of her from the sudden sensation. "It doesn't hurt so bad anymore" she said lifting her hips once again towards his making him groan. Unable to wait any longer he pulled out only to push back in slowly "oooh Jace" she moaned grabbing onto his arms, he pulled back again then a little faster pushed back into her.

He continued like that with a slow pace until he felt her relax against him and he picked up speed. It started with his lips pressed to her cheek moving to suck the sensitive spot on her neck before pulling back then driving his member into her. "Oh god" she cried throwing her head back against the pillow while he did it over and over again. She held onto both of his arms bracing herself then began to meet Jace's thrusts with quick hard thrusts of her own slamming her hips into his digging her finger nails into his arms. "Jace, h-harder" she groaned as he rotated his hips in a circle reaching deep inside of her. "Oh god Clary you feel so fucking good" he moaned against her neck his hair pasted to his head. She clawed at his back desperate for release as his thrust became erratic and harder. He drove into her harder and harder until she was screaming his name "Jace I'm gonna come just a little bit more...oh god Jace" he felt her walls clench around him but she wasn't ready to come yet. He pulled out completely before slamming into her deep and hard making them both moan then he felt a spray of liquid when she came, he followed soon after his body shaking.

He pulled out of her gently before collapsing next to her, her legs were shaking while she rode out her high, and she was breathing heavily. He lightly stroked her clit "oooh that feels so good" she moaned as she neared the end of her climax.

He reached over and wrapped his arms around her thin waist before pulling her against him, Clary felt weak, weaker than she'd ever felt. Her whole body was shaking from pleasure and she was certain she wouldn't be able to walk the next day. Then a wonderful thought struck her, no one was going to be home tomorrow they had a meeting with the other heads of the institutes, her and Jace wouldn't need to walk anywhere they could just do this again tomorrow morning.

Authors Note- Okay so I hope you guys like it and right now it's just the one chapter but if anyone wants me to continue just leave a review or if there's anything I can improve on, this is my first lemon after all :) Please review!