In this fanfiction/ in later chapters: Rough sex, urges, biting, scratching, screaming, slight possession, knife play, spanking, blood.

Moriarty eyed Sherlock with an interested expression. His mouth curled up into a smirk as his eyes travelled up to Sherlock's face where he met his eyes. Those beautiful, blue eyes which just pierced into his skin and gave him chills.

"I owe you, Sherlock." Moriarty smirked wider, "I. Owe. You."

Sherlock didn't reply, but Moriarty didn't miss the way his body tensed. Jim watched him narrow his eyes and clench his fists.

"It breaks my heart when you don't speak to me, it really does." Moriarty grinned and crossed the distance between both of them. He placed a hand gently over Sherlock's cheek, "don't you love me, pet?"

"Don't touch me." Sherlock hissed, smacking his hand away. Moriarty chuckled,

"My, my, you need to work on your manners."

Sherlock glared down at him but didn't move away when Moriarty leaned up to plant a delicate kiss on his cheek, "I'll take my leave." He whispered before heading for the door.

Suddenly he was stopped by a hand around his bicep. He turned to see Sherlock still glaring at him, but before Jim could say another word those precious lips we on his, kissing him harshly. Jim was taken aback by the sudden motion but didn't pull away; instead he pushed back into the kiss just as viciously.

There was pure animalistic want as Moriarty took control, pushing the detective roughly against door and nipping his lips. Hisses of pain could be heard as nails scraped against skin, lifting material and drawing blood. Moriarty groaned into the kiss and ripped open Sherlock's shirt, his hands exploring every inch of Sherlock's smooth, pale chest.

The taller man growled and slid his hands up the back of Jim's blazer and shirt, running his warm hands over Moriarty's spine. Jim smirked and pulled away from the kiss, looking at Sherlock's bloodied and swollen lips aroused him erratically, but Jim was a patient man, he could play with his pet a little bit before the sex. "I love seeing you like this; desperate, fierce, wanting." He sucked a bite onto Sherlock's neck and chuckled at the quiet moan the detective gave.

"Shut up and fuck me." Sherlock breathed.

Moriarty moaned at those words, oh how perfect they sounded in the deep, velvet voice, heavy with arousal.

"Gladly," The criminal mastermind pulled Sherlock away from the door and threw him down onto the sofa, climbing on top of him quickly and pinning him down. He lifted Sherlock's hands above his head and held them there; he enjoyed his prey being helpless and needy before him.

Moriarty examined the man before him and almost drooled at the scene; a hot and flustered Sherlock at his mercy, how enticing. The criminal purred and scratched his nails down Sherlock's already sore chest, grinning at the groan that left the other's man mouth.

Jim's hand wondered down towards the button on Sherlock's trousers and circled it a few times, admiring the design. Oh what a shame it would be if I were to ruin them. He thought before ripping the button off and practically tearing the trousers off Sherlock's legs.

Crawling in between the detectives legs, Moriarty palmed the other's erection through his boxers and swallowed the moan from his mouth with another harsh kiss, slipping his tongue through Sherlock's lips. He could feel the detective struggling to free his wrists from Moriarty's grip; no, no, daddy doesn't play that way.

Moriarty worked at his own trousers and released his erection from beneath his boxers, stroking himself a few times while ghosting his lips over Sherlock's; in that moment, he could smell the lust between them. This was nothing but pure sex – pure want. Moriarty liked it.

The criminal pulled down Sherlock's boxers and smirked at his erection, "I'm impressed," He chuckled seductively, running a thumb over the tip. "If you weren't so demanding, I'd insist for you to be inside of me."

Sherlock moaned again and Moriarty couldn't help himself when he caught the detective in another rough kiss, freeing his wrists and sliding his pre-cum slicked fingers down from Sherlock's cock to his arsehole, teasing it slightly. The detective gripped Moriarty's shoulders, hissing with excitement.

Tentatively Jim slipped one finger inside of him and Sherlock gasped, digging his nails deeper into Moriarty's shoulder blades, the criminal stroked his cock, hoping to relax him so he could slip another finger in. He was a patient man and Sherlock was his prize, he didn't want to scare him off.

Sherlock was becoming restless so Moriarty slipped in another finger, curling them inside of the detective, scissoring him until he loose enough for Moriarty to fuck that beautiful arse until he screamed for more.

"I didn't h-have you down as a...as a tease." Sherlock breathed as Moriarty finger-fucked him.

"Daddy's full of surprises, pet." He smirked in reply and removed his fingers to stroke and slick himself.

The criminal lifted Sherlock's legs over his shoulders, leaned in close and took hold of Sherlock's bottom lip with his teeth while he pushed himself slowly inside of Sherlock, trying his hardest not to ram all the way in from hearing the gasp leaving Sherlock's mouth. Everything about this man was arousing, Jim was happy he could finally posses him like this; see him so open.

When Moriarty was all the way in, he touched foreheads with Sherlock, "I want you to scream for me."

"You're going to have to try very hard for that." Sherlock hissed and lifted Moriarty's shirt as he slipped his hands around the other man.

Jim gave a breathless laugh and pulled himself fully out, suddenly slamming back in and savouring the loud moan that escaped the detective's mouth, "No I don't." He chuckled and began to thrust teasingly slow, knowing exactly when he hit Sherlock's prostate.

During his slow thrusts, the criminal murmured teasing words to the detective, telling him how tight he was, how much he wanted to bite every part of his body, how badly he wanted to just make him scream for more. He slowly scraped his nails down Sherlock's thighs and gripped them tight enough to cause bruising.

Marking you as mine; you are mine.

"You want me to go harder, you're going to have to ask, pet." Moriarty smirked, running his fingers over Sherlock's cock slowly.

"Fuck," Sherlock grunted, Moriarty gasped dramatically,

"Such a dirty mouth," He picked up the speed of his thrusts, "come on, beg for more."

"God-" Sherlock breathed, "please...fuck, please, harder."

"I didn't hear that." Jim leaned in and nibbled along Sherlock's jaw line.

"Fuck me harder!" Sherlock moaned out loudly as Moriarty thrust hard against his prostate. The criminal said nothing but smiled, turning his thrusts turned, becoming deep and rough. Moriarty sucked on the raw, bleeding marks on Sherlock's neck and captured his wrists is his hand again, pushing them forcefully above the other man's head.

You are mine.

Mine.

Sherlock was hissing and moaning, Jim could have classed it as screaming but he knew he could get more out of the detective, and he wanted to do it fast because he could feel an orgasm creeping up on him. He started stroking Sherlock's erection with his free hand and felt the moans rumbling the other's man throat as he kissed it up to Sherlock's ear, nibbling on the lobe and breathing down right dirty things into his ear.

Sherlock began to tense and Jim knew the detective was close; he started thrusting faster and more desperately, stroking Sherlock in time with his thrusts. Moriarty whispered into Sherlock's ear again, "come on, scream for me."

And Sherlock did. Moriarty thrust in deep and Sherlock came, screaming 'Moriarty' as he did so. Jim smiled and pulled out, stroking himself a few more times until he came over Sherlock's stomach, his semen mixing with the detectives.

It took them both a moment to catch their breath. Moriarty continued to look down at Sherlock laying spread out before him, relaxed and looking so beautiful after sex.

"This changes nothing." Sherlock said suddenly. Jim smirked and leaned down to kiss Sherlock deeply on the mouth,

"Of course not," He murmured against Sherlock's lips, "but you're mine."

"I'm yours." Sherlock breathed.

WELL, this is the first time in a while since I've written smut and it's my first time writing Sherlock smut. For me, Sherlock is asexual, but hey-ho, I don't like to label! Sorry if it's OOC, it's literally just a quick 'I'm feeling sexually frustrated so I'm going to write porn' moment.

Hope you enjoyed!