This is my first Uchihacest fic so you know, don't take it harsh on me, people! It was supposed to be a oneshot but I guess things change... and in this case for better ;D.

Warnings: this story contains a huge amount of lemon, shota and incest, so read under your own responsability! Also, the story is pretty much bound to satisfy lust needs, so I apologize if you find things too rushed. As I said; this is just a way of wringing out my perverse mind into words. So just sit and enjoy!

Disclaimer: I obviously do NOT own Naruto because if I did; Itachi would be fucking his lovely brother senseless, we'd get our eyes on Icha Icha paradise, Pain would've kicked ass in war, Orochimaru would be beating the crap out of Kabuto for trying to overshadow him, Madara would be making love (did I mention with me?) instead of war and for once Sakura would be useful, among other things.

xxXxx

"Niisan!" Sasuke gasped when he saw Itachi standing straight over the door with a curious face.

Sasuke was sitting on his bed, back leaned on the wall with his legs bent and his right hand slightly under his shorts. His cheeks were red, both from excitement and embarrassment.

He did not know why he had felt tempted to caress that unexplored zone of his body but he did somehow understand it was a private deed. Therefore, the fact that his brother had caught him in such a moment made him feel uncomfortable. He immediately removed his hand from his intimacy and pulled the blanket over his lap gripping it forcefully. He cursed himself mentally for being so reckless.

Itachi just stood still at first until he decided to step in and close the door in case their parents were to return home. He didn't know what to say. His little brother had been touching himself? Already?

"Sasuke", the named one stiffened, "what were you doing?"

The youngest lowered his gaze and whispered a few words Itachi couldn't even register. He approached the bed and sat near his brother. He asked again. Sasuke then eyed him shyly and spoke louder.

"I was just playing, aniki."

Hn, playing. Itachi smirked. Sasuke had always been adorable. He'd scream his name all day long, craving for his attention and Itachi couldn't help but loving it. Loving everything about his baby brother, no matter how bulky he'd get now and then. Sasuke was the only one he had allowed to hold his heart. Under his often expressionless face there was this insane passion waiting to be released. Even if asked, Itachi wouldn't be able to put into words the tingling feeling that coiled in his stomach everytime Sasuke was near, everytime he brushed against him, everytime he found him faithfully waiting for him. Just for him. Under any suspicion, the innocent yet lustful scene Itachi had just witnessed had awkwardly activated his full senses. He couldn't- he wouldn't let this just pass, not after so long he'd been yearning to hold Sasuke in a much more brotherly way that he was supposed to.

He gently stroked Sasuke's hair by the back of his head.

"Sasuke, do you trust your aniki?" He asked in a serious tone. He needed to hear it. The young boy stared intensely at his brother. Why was Itachi asking such an obvious question?

"Of course I trust you, niisan!" He let got in such a carefree way it made Itachi smile slightly. He wasn't sure Sasuke understood what those words really meant, especially their double meaning to him but he wasn't just about to let go the chance to settle down his needs.

Itachi then cupped Sasuke's chin while looking fiercely into his eyes and locked their lips in a fervent kiss.

Sasuke moaned in surprise and Itachi's tongue shortly requested entrance to his humid cavity.

Sasuke let his brother's tongue dance freely in him while he tried to compete with its skill until they finally parted for air. Sasuke was shocked by his brother's behavior thought he had clearly enjoyed this.

"Niisan, why…?"

"I want to make you feel good, otouto", Itachi stated licking Sasuke's lips before the youngest could proceed.

"But we are brothers, isn't this supposed to be wrong?" Sasuke asked confused.

He had a point there.

"Did it feel wrong?" He asked solemnly.

Sasuke doubted for a second. It hadn't felt wrong at all, it actually had felt amazing. Having his brother so close staring straight at him, playing with his tongue… made Sasuke wonder how good it could end up feeling if he let him continue touching him.

"No…" Sasuke answered uncertain.

"Then let me make you feel even better, otouto."

Some - if not eveyone - would think that Itachi's moral rationality had just pancaked in a blink, but they'd be wrong. Thus his surrender was prodcut of years of endless craving. As for his insanity, well; he lived to perform death. So if that wasn't a reason enough to lose yourself in madness, enticing your beloved brother into the sinful web of forbidden love wasn't even close either.

Itachi pulled Sasuke's t-shirt off and glanced at his tiny pink nipples. He was gorgeous indeed. He brought his right hand he had been using to fondle Sasuke's hair towards one of them and caressed it gently before starting to squeeze it.

"Aaah…!" Sasuke moaned while grasping Itachi's hair. The eldest then proceeded to lick it, making Sasuke moan higher.

"Aaaah, niisan!" He mumbled gripping him harder.

Itachi repeated the process with the other nipple and Sasuke let him notice with his constant squeaking that he was enjoying it.

After a while he stopped the teasing. Sasuke's delightful whimpers were turning him on.

"Would you like me to keep going, otouto?" He asked just for cordiality.

"Yes…" Sasuke babbled.

"Are you sure?" He reassured as he licked Sasuke's torso. He liked taunting him.

"Yes, niisan…" he whimpered.

Itachi didn't need more. He lured away the blanket from Sasuke's lap and removed his shorts.

"Wait, niisan! What are you doing, not there!" He shrieked. He wasn't actually expecting that.

"Too late, otouto" he grinned pulling down his underwear revealing his member.

He held it and started stroking it in a slow pace, gently fondling the tip.

"You better moan for me, Sasuke."

"N-niisan! Niisan!" He moaned aloud.

"Otouto…" he murmured kissing Sasuke, speeding up the strokes. One of Itachi's hands pressed Sasuke's nipple.

"I-Itachi niisan!" He kept screaming quickly "something… something's going to come out."

Itachi then realized that before he entered the room, Sasuke had probably been having one of his first explorations of desire and obviously had never gotten to the end. That knowledge definitely turned Itachi on; he was just about to experience his baby brother's first climax.

"I-Ita-Itachi niisan, It's…!" He moaned, cumming in his brother's hand. Sasuke instantly blushed, breathing agitatedly.

"I-I'm sorry, I wet myself, niisan" he muttered.

"No you didn't otouto. It's a normal thing that happens when you're enjoying yourself. Did you like it?" He asked, pecking his lips.

He nodded.

"I'm going to clean you then."

Itachi bent over his lap and started licking Sasuke's small member, soon getting it hard again.

"N-niisan… that's nice" he moaned watching his brother trail his tongue around his cock until he fully covered it with his mouth.

"Ah-oh!" He shrieked curving his back. His member was still sensible from the previous release "it's going to spill again, niisan!"

"It's ok, let it out" he murmured releasing the dick from his mouth for a second and immediately kept sucking on it again.

"Oooh, n-niisan, oh…!" He cried as he came again, this time inside Itachi's mouth.

"Hmm" Itachi groaned, feeling his brother release, swallowing his sperm profusely.

"Niisan… that's, that's dirty" Sasuke panted, watching Itachi so encouraged.

"It's not. There's nothing dirty in you, otouto" he assured, lifting his head slimly and kissing Sasuke.

The youngest let go a low moan as he felt that hot mouth that had engulfed his member, now carrying Sasuke's unique scent.

"Niisan…"

"Hn?" Itachi motioned biting his delicate neck while softly endearing one hand through Sasuke's back.

"Should… should I make aniki feel good to?"

Sasuke was so daring. He was just getting started and already was willing to prove he was in control too.

"Sure" he grinned, biting his pale flesh once more.

Itachi slowly undressed fully, discovering his bigger shaft covered with a few dark locks. Sasuke peeked at it, curiosity all over his face. Itachi sat comfortably, legs spread.

"All yours, otouto."

"What should I do first?" He asked embarrassed.

"Come stroke it as I did."

Itachi was hard by now as a result of the previous enthusiastic moments. Sasuke did as he was told. He gripped his brother's cock and started to pump it at a slow pace.

"Aah… Sasuke" he groaned at the feeling of his baby brother's movements. Itachi forced himself to keep his eyes opened, reveshing over the sight of Sasuke stroking his member devotedly, "go faster..."

Sasuke sped up the rhythm, observing Itachi growl hoarsely. The youngest then catched Itachi by surprise when he introduced his pulsating cock in his tiny mouth. Itachi howled in pleasure.

"Sasuke!" He screamed, gritting his teeth and clenching firmly the boy's spiky hair, rocking his hips to have him swallow his cock all the way.

He couldn't believe Sasuke was doing so well; he was brining him near his climax.

"Stop it, Sasuke" he grunted.

"But I want to taste aniki's pleasure too. Doesn't it feel good?" He asked sadly before continuing to devour his member.

He was so damn cute.

"Yes… you're very good, otouto", he replied fondling his hair with a faint smile.

Sasuke increased the speed until he finally brought Itachi over the edge.

"Hn, otouto, ah…!" He shouted, cumming in Sasuke's mouth.

Sasuke coughed a bit as he tried to gulp the whole cum. Itachi threw his head back, gaining his breath before staring back at Sasuke. The young boy blushed when he became aware of Itachi's gaze.

"You taste good, nii-san", Itachi shrugged, "did you like it?" He asked with a childish smile.

"Very much", Itachi caressed his cheek and this time it was Sasuke who approached his brother to kiss him. Itachi embraced Sasuke and leaned him on the bed, positioning himself on top.

"There's one last thing I want to show you", he licked one of Sasuke's nipples "I promise it will make you feel good too, okay?"

Sasuke moaned at the slight touch.

"Okay… I want to know everything, niisan" he answered caressing his brother's bare chest.

Itachi smirked. As expected from his baby brother.

"Lick them". Itachi held three fingers in front of Sasuke's mouth. The young boy looked at thim hesitantly before engorging them all for a while until Itachi removed them from that cavity and prepared to insert them in a new one.

"What are you going to do, niisan?" Asked Sasuke in a scared tone, starting to stiffen.

"Relax. You'e going to notice a little pain at first, but I promise you'll soon experience a lot of pleasure. Just relax otouto" Itachi reached up to sweetly kiss Sasuke's forehead and then moved lower to lock his lips as he gently introduced the first finger in Sasuke's tight hole.

"Hnm!" Sasuke screamed against Itachi's lips. "Niisan, it hurts!" He kept on crying as Itachi dug his finger further in, stretching his cavity.

"Shhh, it's okay", he hushed, planting soft kisses along his chest.

He then slowly inserted a second finger and moved them smoothly in and out. Sasuke clutched onto Itachi's arms as he kept sobbing but he was stunned when Itachi suddenly hit a new spot that sent shivers up his spine.

"Oh, niisan!" He cried out.

Itachi understood he had found Sasuke's prostate and decided to take it to the next level due to his overwhelming hunger. He removed both fingers and positioned his big swollen cock in Sasuke's entrance.

"Uhn, why did you take them out now, aniki?" Sasuke pouted in disagreement.

"Because I want you to feel all of me, otouto. Inside you." Sasuke was puzzled. Itachi started to penetrate his little brother's ass with no further notification.

"No, niisan! That can't fit, it's going to- aaah!" Sasuke screamed unable to finish the sentence. His brother had fully intruded in him in a slow but firm thrust.

"Hnn, you're so warm and tight…" Itachi groaned as he accustomed himself to that inviting hole.

"It hurts, niisan, please stop! It hurts!" Sasuke shouted helplessly at the tearing feeling.

"My sweet otouto…" Itachi leaned towards Sasuke and kissed him deeply. He stayed still a few seconds, caressing his baby brother's features, offering him time to get used to his length.

"Move, otouto", he demanded biting Sasuke's earlobe, "just move as you wish", he groaned.

Sasuke hesitated, unsure of wanting to do as he said, afraid of the pain. But the sight of his brother in such a lusty state made him accept the request.

Sasuke started moving carefully on Itachi's stiff cock, nailing down hard on his brother's shoulders, slowly attracting Itachi's body to his.

"Oh, otouto…" Itachi moaned at the delightful feeling of Sasuke's unsecure rocking.

"N-niisan…" Sasuke quivered "Itachi nii-niisan…"

"You'll have to move in deeper if you want me to hit you're sweet spot, Sasuke", he groaned as he kissed him, twirling their tongues together.

Sasuke intensified the pace, allowing Itachi to move freely too, both surrendering to the unceasing pleasure.

"Ah, n-niisan, niisan! I can feel you, you're- aaah!" Itachi grabbed Sasuke by the wrists and lifted him up aware of not parting from that welcoming hole and sat him on his lap, cock stammering right on Sasuke's prostate making him scream in joy.

"Aaaah! There, niisan! Hit it again! Please!" He cried out hugging Itachi by the neck with both slim arms, resting his head on his shoulder.

"Sasuke", he panted, "my little Sasuke..." Itachi placed his hands on Sasuke's thin hips and pumped him even harder, gaining loud moans from that lascivious body he craved so much.

"Aah, ah, oh, n-nii-niisan it, it feels weird…" Sasuke whimpered clutching harder on his brother's upper back. Itachi deduced by the intense constrictions of his baby brother's ass that he was trying to notify his soon orgasm.

Itachi gripped his brother's aching cock and started to stroke it fiercely as he continued to screw his hole nonstop.

"Aaaah! Niisan! Itachi niisan! I'm, I'm…!"

"Come for me, otouto", Itachi growled in a husky voice and as if Itachi's claims were unavoidable, Sasuke released on Itachi's stomach and chest, snuggling his head in the crook of his neck.

"Niisaaan!" Sasuke screamed out loud.

As soon as the eldest felt his brother's ass tighten around his length and shortly noticed his warm cum splatter on his body, Itachi reached his own orgasm.

"Hng, Sasuke!" Itachi groaned gripping harder on his little brother's hips, bringing him closer.

They were both exhausted and breathless.

"N-niisan…" Sasuke murmured still holding tightly onto his brother, panting heavily.

Itachi was the first one to partly recover and searched Sasuke's gaze. He bent his head and cupped Sasuke's chin up to stare at him. The boy's expression was covered by a mixture of lust, confusion and satisfaction.

"Did you enjoy it, otouto?" Itachi asked still aroused.

"Y-yes…" Sasuke answered lowering his eyes just as he did the first time Itachi went near him before it had ended up to this. "It felt amazing, niisan."

Itachi pressed hips lips against Sasuke's and they savored each other, saying everything they couldn't put into words. When they parted, Itachi motioned for Sasuke to get up and as he left that tight little ass he laid down on the bed, convincing Sasuke to lay beside him.

The youngest immediately rushed to snuggle on his brother's neck, a childish grin escaping his lips. Itachi placed an arm around his brother's body and pulled Sasuke even closer.

"Niisan…" Sasuke whispered.

"Hmm?"

"Can we do this again another day?" He inquired softly against Itachi's hot skin with a wide smile, eyes closed before sleep eventually took a hold on him.

"Anytime, my sweet little Sasuke…" he whispered back, eyes not parting from his brother's sight.

xxXxx

Yay! 1st chapter done! Can't believe I finally made it! I'm so excited with this story though, I just LOVE Uchihacest.

I'll probably won't update soon, but be patient and don't forget to review ;)