Heavy sex in this chapter.

Itachi wailed, mouth falling open as he panted. "I-I'm so so sorr-sorry for being a whore senpai!" He practically sobbed. Kakashi's talented tongue was bringing him so close to the edge and Itachi was almost in pain for the pure pleasure that his senpai was bestowing upon his ass. His head fell forward and he whined low in his throat. Dark eyes widening. "Kak-Kakashi senpai... Ahhh!" His knees were close to buckling and he cried out again as that most talented tongue dove into him without abandoned. His fingers dug into the window sill, thighs shaking. "Will...will you ever forgive me?" He questioned weakly, biting his swollen lip.

Kakashi groaned against the pucker and placed one last and moderately sloppy kiss before standing back. His face was flushed and eyelids lowered with lust. His cock was swollen and red, the tip dripping with enough pre cum to stain his pants. And the sight before him did nothing but make it ache more. Itachi was so beautiful, especially like this, skin glistening with sweat and flushed red in all the right places, long dark hair mussed and flowing freely. The sweet cries and keening noises he made awakened something primal in the silver hair man, every time they slept together. Kakashi swatted his cheek again while he admired the view.

"Maa, my beloved kohai. You're so pretty when you beg for me." He rubbed at the fresh hand print before smacking the other cheek and leaving an identical mark. "But your punishment isn't over yet." The copy nin cooed. "Now, I want you to finger yourself while I go grab the lube." He leaned over him again, chest brushing against his back so he could nuzzle into his neck. "And make sure to put on a good show for the passerbys, okay? You wouldn't want to disappoint me further. " Sharpened canines nibbled at the skin behind his ear before he disappeared to find the lube.

Itachi trembled at Kakashi's order. His fingers moved to do as he was told, grateful no one had bothered to look up from the street. He whined as his fingers invaded his body, hips slowly moving against them. He couldn't hear where Kakashi had gone but already he felt relieved. Obviously Kakashi was not so angry at him anymore. Why else would he want to have sex with Itachi? The Uchiha panted, eyelashes fluttering over his cheeks. He whined softly, lips trembling as he waited for his lover to come back.

Kakashi returned quickly, the small clear bottle in tow. It had gotten left behind in the bathroom after his and Itachi's last sexual encounter. He had to stifle a groan when he walked back into his room, the sight sent what was left of his blood supply right to his manhood. He pulled his sweatpants down enough to free his cock and sac, a soft hiss escaping him as the cool air hit the sensitive flesh. Coming to a halt behind Itachi, he popped open the bottle and squeezed a generous amount onto his member and two of his fingers.

"Tell senpai how bad you want it." He commanded, voice husky from lust. He slipped his ringer finger into the hole alongside Itachi's, following the rhythm he'd set. The Uchiha could have cried from happiness when Kakashi came back. He tilted his head back, dark eyes on his lover.

"I want you so bad senpai...please..." He begged without shame. He pulled his fingers away and reached for Kakashi. "Punish me senpai."

Kakashi let out a long groan at his lovers words. He took the hand that was reaching for him by the wrist and kissed his knuckles before making him brace himself against the windowsill once again. He slid his middle finger in along side his ring finger, working the digits slowly to make sure his hole was good and wet.

"Beg for it. " The copy nin growled, leaning over Itachi so his chest was pressed against his back, his fingers working him and searching for that little bundle of nerves. Itachi gasped, head falling forward as Kakashi's talented fingers breached him.

"Kakashi, please..." He moaned softly, mouth falling open. Kakashi always managed to touch those nerves inside him that made him wild. He bucked against his senpai, trembling violently. "Please fuck me, senpai...I can't stand it." He cried out as those fingers moved. He was going to lose his mind. He needed Kakashi inside him. He leaned up, head pressing against Kakashi's throat. "Please..."

Kakashi slipped his fingers out with an audible pop before slamming into Itachi full force, not even giving his poor kohai time to adjust to his girth. He immediately started thrusting into him as hard and as fast as he could, his anger fueling him. Large, calloused hands gripped at his waist with almost bruising strength, forcing the Uchiha to meet each buck of his hips.

"Do you like being fucked like some whore?" Kakashi hissed out into his ear, running his tongue over the shell and nipping. The smacking sound of flesh hitting flesh filled the room from his relentless pounding. Itachi was unable to hold back to cry that escaped him at Kakashi's sudden and brutal slam inside him. He gasped, eyes widening. He gripped the windowsill, breathing deeply as he forced himself to adjust to Kakashi's brutal thrusts.

"No..." He answered truthfully, voice cracking. He hated feeling used. This was humiliating and near painful. Kakashi had never been this rough with him before, always asking if Itachi was comfortable. This was almost cruel. He knew he deserved this though and once it was over, he and Kakashi could return to normal. He gasped slightly as the Copy nin thrusted, pleasure springing forward.

Kakashi lifted one leg up, placing his foot on the windowsill for support. He gave a few more punishing thrusts before slowing his pace and practically coming to a halt while balls deep in his lover.

"Could've fooled me." He breathed out, nipping one last time at his ear before leaning his head down to suck at Itachi's neck. Hands moving down from his waist, he spread his cheeks to get as deep in him as possible, grinding into him in slow rocking motions.

Itachi leaned against his lover, relaxing slowly. His mouth fell open as Kakashi's lips touched his throat. The slower thrusts were far more pleasurable. He reached back to cup Kakashi's head and he turned pressing his lips tenderly against Kakashi's face. His fingers curled into his lover's silver hair, smiling weakly against him. Itachi moaned softly as another thrust sent his nerves spinning.

"Kakashi..."

A low moan was muffled against Itachi's throat between kisses and sucking. He pulled away when he was satisfied with the hickey and love bites on his throat. The primal part of him wanted to mark every inch of his pale flesh, to make sure everyone else knew to stay away. The other part of him knew it wouldn't make a difference, Itachi had gone out soaked in his scent and still took another lover. Kakashi leaned in and kissed him, desperation pouring into the kiss.

"Tell me I'm the only one." He breathed out between kissed."Tell me I'm the only one you're gonna give this to." His hips pulled back, leaving just the tip before slowly pushing back in and repeating.

Itachi moved suddenly, heart hammering at Kakashi's desperate words. Had they finally reached that point? Was Kakashi actually ready to talk to him? He managed to hook his arms around Kakashi's neck and kissed him as desperately as his senpai was kissing him.

"You're the only one Kakashi. The only one in my heart and I'm so sorry. I'm yours forever, please know that. There will never be anyone else again. I swear to you, senpai." He murmured between kisses, eyelashes lowered as he gazed longingly at his lover. He held onto the man like he would lose him. He was so desperate for him to understand. "I love you, Kakashi."

Kakashi placed his foot back on ground before lifting Itachi, and with surprisingly little difficulty, managed to move him to where the were chest to chest and the copy nin had his arms hooked under his lovers thighs. "I love you so much it fucking hurts. " he murmured, hands gripping firmly on Itachi's ass. He began lifting him up and down on his cock, speeding up slowly until he found a rhythm he liked. Thrusting upwards and bouncing his lover on him had already gotten him near panting, a small sweat breaking through between his shoulder blades. The familiar sensation of the knot at the base of his shaft beginning to swell made his toes curl. Itachi kept his arms securely across Kakashi as he kissed him.

"Kakashi..." He moaned. His toes curled and he arched up as his orgasm approached. "Kakashi!" He managed before pushing forward, nails digging into Kakashi's hair as he came, voice cutting off into a broken cry. It was the most intense orgasm of his life and the most painful.

Kakashi gasped at the feeling of Itachi clenching around him. The tight, velvet heat was enough to push him over the edge. Before he knew it he had sat back on the bed, hands on the Uchiha's hips and forcing him down as far as he would go, knot popping upwards and securing their connection. He released his seed with a long, low moan. Eyes nearly rolled into the back of his head, he saw stars as he emptied himself into his lover. A string of barely understandable words tumbled from his mouth, something along the lines of 'fuck, oh fuck, fuckin', ita' and ended with a sigh before he rested his head on Itachi's shoulder, completely spent. Itachi panted, clinging to Kakashi as his lover came inside him. He called out again as Kakashi finally came, fingers digging into Kakashi's skin.

"Kakashi..." He shuddered as the man came deeply inside him, pulling Kakashi close. He felt the man press his head against his shoulder and he kissed his hair tenderly, still breathless. He smiled weakly, stroking his lingers down Kakashi's cheek. "I think you knotted again." He murmured, trailing over lips as he smiled.

Kakashi practically whimpered as he came back down from the high of his orgasm. All the sensation from his lovers affection was over stimulating, giving him goosebumps. He kissed the fingers that trailed over his lips.

"Can't help it... needed to mark you" he murmured, words slurred and shaky. Cumming like this always made him feel strange, not a bad strange, but almost like he was intoxicated. The copy nin pulled Itachi closer and wrapped his arms around him, ignoring the sticky cum between their chests and the pulsing knot connecting them. He nuzzled into the crook of his lovers neck and closed his eyes, trying to regain composure.

Itachi hummed. Personally he enjoyed the knotting. It marked him as Kakashi's in every way. Kakashi was a generous lover and Itachi could not imagine not having him at his side. He pressed feather light kisses against his lover's skin.

"I like it." He admitted with a weak grin. He brushed Kakashi's hair from his face, kissing the scar tenderly. "I'll get you a rag, hmm?" He suggested as he lifted up. Kakashi's thick cock slipping out of him. Itachi was already sore, but he would not have in any other way. His legs shook as he got to his feet, cum leaking down his thighs. He ached, but didn't regret it. He was still hoping Kakashi would sit him down so they could actually talk about everything that had happened. Kakashi winced when Itachi pulled off of himself, he was still somewhat swollen and the movement was uncomfortable. He lifted his head, eyes struggling to focus on the man in front of him. He reached out when the world was steady again and grabbed his kohai's hand.

"Wait." He whispered, a small frown on his face. Itachi blinked and looked towards Kakashi and the hand holding onto him. He returned to the bed. He smiled and pressed his lips against Kakashi's, eyelashes brushing over the man's cheek. "I'll be right back, let me grab you some water at least. You sound like you need it." He mused, stroking Kakashi's silver locks fondly. Kakashi sighed, frustration building. He blinked slowly, the familiar throbbing of a headache coming on due to the turmoil on his head. Post coital bliss or not, he was still struggling with what Itachi had done.

"Itachi, listen." He said, voice blank. He pinched at the bridge of his nose and drug the hand down his face, trying to right his emotions before continuing.

"I think you just need to get dressed and head home. "

The knotting is based off of Circlemagick's headcanon! Also for those wanting Itachi to suffer a bit. Tune in next chapter!