AN: So, this is where the graphic sex part lives! The Final Chapter! (Dun, dun, dun) So if you're not a fan of graphic MM sex then read a little bit and when it gets too much skip down to the end! Ahaha. Hope you guys have enjoyed this, I know I did.

I Want This. I Want You.

The doorbell rang, urgent and fast. Mark's heart jumped and his stomach knotted. His first thought was Callie, Arizona and most importantly Sofia. Had something happened to her? He'd left her with Callie and Arizona over an hour ago, needing some peace and quiet to think. You weren't thinking, he thought, you were brooding. The doorbell rang again and his stomach knotted a little more.

"I'm coming! Callie? Is it Sofia!" He cried out, finally reaching the door and throwing it open. The person standing before him shocked him so much he looked around for someone else, thinking it was some sick joke. It was Jackson and unless Mark was mistaken he looked more than a little sheepish, he looked scared to death.

"What do you want?" He asked harshly.

"Can I come in?"

"No. Now what the Hell do you want?"

"Look, it'd be easier if I came in. I don't really want to stand out here and discuss our…personal issues. I know you're pissed off at me and you have every right to be. Just hear me out." Jackson asked looking at Mark and once again he couldn't resist those puppy dog eyes.

"Fine." Mark told him, stepping backwards and letting Jackson step into his flat. He looked like he wanted to come in further but Mark was trying his hardest not to break here. He was sick of the messing around, sick of the mixed signals and he could quite easily have shouted at Jackson to get out, to just get out and never speak to him again but something stopped him. He wasn't sure whether it was how awkward and shy Jackson looked or the fact that what Julia had said was right, he did love him. Mark watched as Jackson shut the door behind him before looking down and biting his lip.

"Look, just say what you have t-"

"I walked away before."

"What do you mean?"

"From Lexie. I walked away from Lexie and that was for my career. I needed time to focus, time to study…then you came along and started helping me and you were just…perfect. You took the time to teach me, spend time with me. I saw how you were with patients; especially Laura and I started feeling more, feeling something I haven't felt in awhile. I'm with you and…I'm safe. I'm happy and I'm safe and nothing is confusing. You kissed me and there was this connection, we just fitted together and it felt right but it scared me too. I always, always pick work over everything else. I've done it my whole life, nobody pushed me so I pushed myself and every time a choice came up medicine came first. But this time…"

"Yeah?"

"This time I'm picking something I actually want." Jackson said before moving forwards and wrapping his arms around Mark's waist. Their lips met and both men felt the connection between them. It coursed through their bodies and made the kiss passionate. Tongues and lips slid against each other as hands roamed over muscles. Wanting to just stand there and enjoy the kiss but knowing he couldn't, Mark pulled away. His hands were resting on Jackson's biceps.

"Are you sure about this because the last few times we've kissed you've ran away and I can't handle that. I can't handle you coming here, saying all this stuff and then running away again. It'll break me." Mark told him, his eyes focused on Jackson's and in them he saw no shred of doubt or fear, no anxiety. He saw want, need and lust.

"I know and I'm so sorry. I am sure. I mean, I'm still going to be a surgeon and I'll study as hard as I can for those damn boards. But…I want this at the same time. I don't want to wait and maybe let the chance go by. I want this. I want you."

"You can have me." Mark told him, before kissing him all over again. He forgot about the anger and the hurt that this man had caused him, realising that Jackson had just been confused and conflicted and that finally he knew what he wanted. He relished the kiss, enjoying it more than he thought possible because there was no fear. Jackson wasn't going to run away, wasn't going to pull back and that only made the kiss sweeter. Soon enough, however, kissing wasn't enough and Mark felt Jackson tugging at his t-shirt. He did the same, hands sliding underneath and caressing that flat stomach. His fingers ran over the ridges of Jackson's abs before he raised his arms and brought the t-shirt with them. As he stripped Jackson, his own t-shirt was pulled from him and then he was being pushed backwards. They fell onto the couch, Jackson landing with ease on top of Mark. Both men grinding against the other, rubbing their crotches together as they kissed.

Mark's lustful groans turned to ones of pain as he felt something sharp digging into his back. Jackson sat up quickly and nearly fell off the couch as Mark sat up. He reached behind himself and pulled one of Sofia's toys out from where he had been lying. He threw the toy to the floor and realised the living room was a minefield of toys and he was certain there were more buried in the couch. As he opened his mouth to speak Jackson took advantage and pushed his tongue inside, biting lightly on Mark's bottom lip.

"Not. Here. Bedroom. Now." Mark managed to say through the kissing and moans. Jackson giggled against his lips before pulling away and climbing off of him. As he did Mark noticed the bulge that was clearly showing in Jackson's jeans and he couldn't stop the swipe of his tongue across his lips as he imagined what lay beneath. He could feel his own lust throb and couldn't wait for more. Jackson grabbed his hand and pulled him up before navigating the room. As he led Mark up the corridor he looked back and grinned.

"Just past the bathroom door on the right yeah?'

Mark laughed and nodded his head before being lead right into his bedroom. As soon as he was across the threshold Jackson slammed the door and pushed him against it. Their chest's pressing together, rising and falling in unison as they kissed. Mark could feel a solid thumping and realised he was feeling Jackson's heart against his skin. He brought one hand around and rested it on the small of Jackson's back before bringing his other up and pushing it between his shoulder blades, forcing the other man even closer to him. They stayed like that for God knew how long. Time had no meaning for either of them, they kissed and kissed and kissed and didn't care about anything other than touching and tasting one another. As Jackson's mouth explored Mark's jaw, kissing along the strong line, he slipped his leg between Mark's who groaned at both sensations. Jackson's hot tongue licked a wet stripe up his neck whilst his strong thigh grinded against his bulging crotch. They rutted against each other, rubbing themselves against anything they could. Mark slipped one hand between them and groped Jackson, feeling the hardness and massaging it roughly. Moans and whimpers filled the room as both of them teased the other.

Mark cried out as Jackson nipped at his neck, biting him just a little too hard. His hands were all over Mark, oh God, they were all over and he was sweating. He felt Jackson run his tongue over his collarbone, swiping at a droplet of sweat that had been ready to course down his body. Soon enough he was licking further downwards, his tongue first sliding over Mark's chest before dropping to his stomach. He watched as Jackson sunk to his knees and kissed and licked his stomach whilst his hand worked at Mark through his jeans. His own hand was resting on the back of Jackson's head which had now moved down to his crotch.

"Fuck," Mark managed as Jackson mouthed him through the thick fabric, wetting it through. After awhile Jackson grabbed at Mark's belt, succeeding in undoing it and Mark's jeans in record time. As he pulled everything down Mark groaned at the cool air hitting his cock. Jackson meanwhile sat back on his haunches, admiring the sight before him and rubbing himself through his jeans. Mark noticed him licking his lips and felt a swell of pride in his chest. His cock stood tall and proud, fat and tanned like the rest of his skin. He was uncut, the foreskin covering most of the head. At least it was before Jackson reached up and took hold of him and slowly pulled it back. Both men gasped, Mark at the shiver that ran through him as Jackson touched this part of him and Jackson because of the weight and heat he could feel. It throbbed and he groaned aloud, noting the swollen red head that was now visible, a drop of pre-come glistening at the tip. Mark watched as Jackson moved his head forwards, his tongue slipping out and lapping at the tip. He groaned and had to stop himself from losing it there and then.

"Ja…Ja…I…" Mark could barely speak and his stammering turned to groans as Jackson took him into his mouth, a hot wet cave closing tightly around him. He felt himself throb as his tongue worked up and down his shaft. Jackson started off slow, taking it easy and enjoying it but before long he was swallowing Mark right down to the base, his nose buried in the coarse thatch of pubic hair that held a musky and hot aroma. He pulled back and went to work on Mark's balls, mouthing and tonguing them whilst one hand pumped his cock and the other explored his body. Soon enough that mouth, that expert mouth was back on him and his moaning continued. His brain zoned out and all he could think of was pleasure, pleasure and Jackson. The words "oh God so good" and Jackson's name ran back and forth through his head, taking over completely and he heard himself muttering them. The pressure built and built until he was ready to blow, calling out to Jackson. A shocked groan flew from his lips as Jackson pulled off of him however. He looked down and saw those blue orbs staring back at him, wide and mischievous.

"No, no. I want you begging."

"I…what?"

"I want to hear you beg me Mark." Jackson told him as he very slowly started stroking that stiff member.

"Ja…come on, let me…"

"Beg me Mark."

He groaned as Jackson's tongue slipped out and over his head, the sensitive glands tingling. "Please. Please Jackson."

Jackson took him back into his mouth but he was still going slowly. His hand loosely gripped around the shaft, his mouth sliding up and down slowly. It felt good, but Mark wanted more and he especially wanted an orgasm. He wanted Jackson to suck him, take him into his mouth and suck until Mark shot everything he could and Jackson swallowed it all and dammit he wasn't too proud to beg.

"Please, make me come."

"Mmmm, let me hear you baby."

"Oh God, please."

"Wanna hear you."

"Please."

How long this lasted, Mark wasn't sure. Jackson would speed up his pace, quickly bringing Mark to the brink of his orgasm before he'd either pull back or stop completely. A couple of times Mark had tried to thrust himself forwards, push himself in and out of Jackson's mouth and get himself off but every time strong hands had pinned his hips to the door. He was almost dying, his legs shaking and his heart pounding. His mouth was dry as he asked, begged, pleaded to be allowed to come and each time he was denied. He glanced down and saw Jackson staring back at him; slowly he pulled off of Mark and licked his lips.

"One last time. Come on. Let me hear you one last time."

"Jackson, please…Oh God, please…let me…come."

"As you wish handsome." Jackson responded, smirking slightly and taking Mark back into his mouth. He started a quick pace, his hand tight and gripped firmly. He used all the skills he knew and it didn't take long. His tongue gave one final swipe over the throbbing head and Mark came. He cried out, almost sobbing with relief and pleasure as he filled the other man's mouth, hot spurts coating his tongue. It was quickly swallowed and a shiver of lust ran up Mark's spine as he stared down and saw Jackson swallowing greedily. There was so much some slipped out of his mouth. Mark groaned, pulled out of Jackson's mouth and leant down, swiping his tongue over the escaped drop before slipping it into Jackson's mouth and ending with a long kiss, both of them tasting Mark and loving it. He pulled back, only a few inches and looked upon the other man. His hand came up and stroked against his cheek, fingers brushing over the soft skin. They stayed like that for a few moments before Jackson leaned forward and placed a quick kiss to Mark's lips.

"Now, on the bed." He ordered as he stood up, taking Mark's hand in his and leading him towards the bed. The passion started up again as they fell onto the mattress, Jackson on top of Mark, pushing against him. His jeans were quickly pulled from his body and Mark groaned as Jackson's hard cock grinded against him. Hands slipped over muscle, lips moved against each other and bodies tangled together. Mark managed to slip his hand between them and grip Jackson, his hand tight and pumping slowly. He could feel the heat and lust throbbing in his hands and moaned into the other man's mouth.

"Want you Jackson. Want…so badly."

"You want me inside you? Huh?"

"God…yes."

"That what you want?"

"Please."

"On all fours baby." Jackson whispered to him before kneeling back and stroking himself slowly. Both men moaned slightly as they saw each other fully naked for the first time. Mark stared up at the hard planes of Jackson's body, the caramel skin smooth and unblemished. His eyes were dark, shadowed by lust. He took in the sight of Jackson's hand lazily stroking back and forth, took in his size and felt himself twitch. Jackson was pretty big, bigger than he'd had before and he wanted nothing more than to spread his legs and let him in. He turned over onto his belly, then got up onto his hands and knee's and dipped his back. Pushing his ass out and smirking as he heard Jackson give a little gasp. Hands slipped over him and stroked his cheeks before sliding up his back. They went right up to his shoulder blades before coming back down.

"So beautiful." Jackson whispered as his hands ran over Mark's body. They caressed his cheeks some more before spreading them. Mark waited, biting his lip and wondering what Jackson was planning to do. A hot tongue slipped over his entrance and he groaned, Jackson swiping his tongue over and around him. The teasing began and soon enough Mark was moaning and pushing back. He cried out as that hot tongue pushed into him and sent waves of pleasure through him, groaning as that expert tongue was put to use once again. Mark gave a whimper as that tongue left him and fingers were introduced. One digit worked into him and he moaned some more. Light kisses were placed along his back and cheeks whilst he was worked open.

"You tasted so good, so good."

"Yeah?"

"Mmm yeah. Could taste you for hours."

Mark's voice was cut off, unable to reply to that hot suggestion when a second finger was inserted into him. More kisses distracted him from the burn, soft lips brushing against his skin and soon enough a third finger was inserted. He shuddered as those digits brushed his prostate, pressing firmly against it and causing his whole body to tense. Jackson chuckled as Mark tightened around his fingers, groaning quietly. Soon enough a hard and fast rhythm was pounded into his prostate, those fingers having him writhing and groaning into the sheets. He cried out as they left him, feeling hollow and empty. Jackson leaned back and spat into his hand, slicking his own cock up before adding some more spit to Mark's hole.

"You ready?"

"Jackson…please…yes."

Another chuckle reached his ears and he felt a soft kiss placed at the small of his back. He smiled to himself that smile turning into a clench of his jaw as Jackson started to push into him. He could feel himself stretching open, slowly accepting the invasion. Both of them moaned low and hot. He pushed back, wanting more of the other man inside him. Jackson's hips thrust forward, pushing right into him until he bottomed out. Gasping for breath Jackson held himself there for a few moments, that tight heat holding him. Mark felt himself clenching around the hard cock, his own hands fisting the sheets.

Slowly Jackson pulled back, pulled right out before pushing himself back in. He kept this up for a few moments letting Mark get used to the size of him. Whenever he pushed forwards Mark pushed back, he looked back over his shoulder and managed to catch other man's eye. He nodded slightly and Jackson, acknowledging the signal, grinned and started thrusting into him hard and fast. More moans filled the room, the hot slap of flesh ringing out as they began. He hadn't been with a man for a long time and sure he'd had great sex in his life. But this was something else; Jackson moved inside him and hit him in just the right spot every time. He body shuddered with each thrust, Jackson gripping him tightly and fucking into him. He felt his chest swell as those hands slipped up his back and then raked down his spine, nails sharp and scratching at him. Then they were back to his hips. Once again he lost track of time, lost in the movements of their bodies and the sensations running through him. His ass was a hot knot of pleasure, ignoring the slight undertone of pain. Jackson slammed into him, taking full control as he switched rhythms, sometimes going at a hard and fast pace before slipping into rough and slow thrusts.

"You like that baby?"

Urgh, fuck, fuck yeah!"

"Thought so. You like me in you don't you? Deep inside, hitting that sweet spot."

"Oh…yes. Please…Jackson."

"I'm gunna make you come so hard."

"Again?" Mark questioned doubtful of being able to orgasm again, but the way Jackson was talking to him, his voice low and rough, well he'd do anything for that voice and then there was the way Little…no Big Sloan was rising to the occasion.

"Yeah again. I'm gunna make you come with just my cock. Just me inside of you, pounding into this ass, holding you down and making you take it until you come so hard for me."

"Jesus." Mark whimpered, feeling the pace speed up and Jackson grip him tighter, his hands holding firmly to Mark's hips. Their breaths were heavy and fast, the heat in the room feeling like it was past melting point. Sweat dripped from his own body, wetting the mattress whilst he could feel drops hitting his back and running down his spine from Jackson's. Short groans and hot moans filled the room, the noises issued from both men. The sex was fantastic, passionate and probably the best Mark had ever had. Jackson knew what he was doing, teasing Mark with a few shallow thrusts before pounding into him. Their bodies locked together and became one. Jackson's skin melted to his as he laid his chest upon Mark's back, hot breath panting right into his ear. Dirty words, suggestions and filthy names were uttered in that rough voice and Mark shuddered as his own body quaked. He was close, so fucking close but he held out, wanting to finish with Jackson. A hand slipped up his side, sliding easily along the wet skin, onto his shoulder blade. He felt the strong grip again before Jackson's hand slid under his arm and over his chest. That hand all over him, skating over his belly and so close to his fully hardened cock he whined. A dirty laugh sounded in his ear as Jackson teased him some more, his fingers dancing over Mark's thigh, coming so close to touching him that Mark whined again. He couldn't stop it! He sounded like a needy dog, whining for attention and as Jackson's hand brushed the head of his leaking cock another whine only made him seem more needy. Suddenly Jackson pushed hard into him and started up a hard and fast pace that had Mark's whole body jerking. He could also hear a rhythmic banging noise and realised that his bed, his actual pretty-damn-heavy bed was slamming into the wall. Urgent encouragements were whispered into his ear as Jackson told him what he wanted and what he wanted was Mark, Mark all hot and desperate and coming so hard. Pleasure and pain mixed, waves of pleasure crashed into rocks of pain and the feeling ripped through his whole body. A strangled groan escaped his lips as he felt himself let go, not being able to hold on anymore. His orgasm was powerful and a huge tide that dragged him under. Noises somehow reached his ears, loud groans and then he felt hot liquid filling him up and he knew Jackson had followed him into that tide.

They drowned together, holding on tightly to one another, bodies still pressed up against the other. Coherent thought had flown out the window, along with Mark's strength. He collapsed on to the mattress, Jackson's own strength must have fled too for he followed Mark. Chest never leaving his shoulder blades, stomach never leaving his lower back he fell on top of him. Slowly, ever so slowly they came back to the present. Breathing was still difficult and Mark's thighs quivered as he came down from his high. He turned his head and peeped at Jackson from the corner of his eye, a smirk forming on his face. However, neither could manage words at that moment, so Mark was grateful when Jackson smiled back and leaned down to plant a soft kiss to his lips. A feeling of lose came over him as Jackson pulled away and climbed off of him. He turned his head again and watched as the other man grabbed a discarded towel and cleaned himself up. He braced himself for the moment Jackson would turn to him and tell him he was going to leave now, they always did in the end, and if he did say that Mark would nod and it'd be fine. Totally fine. His jaw clenched, stomach knotted and his heart skipped when Jackson turned and he knew it wouldn't be fine. Nothing would ever be fine again if Jackson walked out now, he'd die and lose hope in everything. A dead calm came over him, his mind blank, body tense and then Jackson smiled at him and everything was…fine.

His whole body relaxed, a huge wave of relief coursing through him as those blue eyes lit up and caught his own gaze. Mark smiled back as the knowledge that Jackson wasn't leaving, he wasn't going to walk out the door and pretend this never happened hit him. He watched as Jackson walked back towards him and grabbed the bedcovers and pulled them back, climbing into bed and waiting patiently for Mark to join him. His smile was soft, sweet and the more Mark saw that smile he knew that things between them were going to be different, everything had changed but it was good because he was pretty damn sure Jackson liked him. A lot. Liked him in a way that just might turn to love. He shook his head, knowing he was getting ahead of himself, way too ahead. Next he'd be thinking about them living together, spending every moment they could with each other, taking Sofia on days out, going on dates or just staying in and watching a film together. Another shake of the head and Mark pushed that entire crazy, future-thinking aside. He crawled under the covers and pressed himself to Jackson's side, his arm draped lazily over his stomach. A kiss was pressed to his forehead and he almost found himself giggling. Actually giggling. This was getting too much and though he'd have liked to stay awake acting like a blushing schoolgirl a nice post sex sleepiness was taking him. Jackson's half lidded eyes told him he was feeling the same. Before sleep took him, however, he wanted to tell, or ask, well he wasn't sure what it was but there was something he needed to say.

"You're an Avery."

"I'm an Avery."

"Well…I'd like you to be my Avery."

Jackson snorted and rolled away from Mark, shaking his head. "Oh God."

"That was really cheesy wasn't it?" Mark said, snuggling up to Jackson, this time Mark's body was the one that conformed to Jackson's. Pressing right up against him and kissing his bare shoulder.

"Yeah it was. In fact I think it was the cheesiest thing I've ever heard." Jackson replied, squirming against Mark and laughing some more as Mark tickled his sides.

"Shut up!"

"Hey I'm not the one spouting cheesy pick up lines. What is this? Singles night for the over 60's at the local shit kicking bar?"

"Whatever. Do you want to be my Avery or not Jackson?" Mark asked, kissing along his shoulder now. Jackson rolled over and pressed his body up against Mark's, sliding his hand over his belly and around to his lower back, pulling him close. Their bodies tangled together whilst they stared at each other for a few moments, nose to nose, silence between them and for just a second Mark thought Jackson was going to say thanks but no thanks. Then he leaned forward and placed a soft kiss on Mark's lips, gentle and loving and right away Mark knew the answer.

"I'll always be your Avery."