A/N

Nothin' really important to say here. Pairing is AlvinxSimon, Cartoon Universe. Read on!

They took a bow as the crowd erupted into applause, shouting their names in excitement. The boy in the middle adjusted his red cap and waved to the crowd.

"Thank you! You've been a wonderful audience!" he said.

"Alvin! Simon! Theodore!" The crowd chanted, a few flowers being tossed onto the stage as the three chipmunks walked backstage.

"The next, and final Chipmunks concert of the night will start in three hours! Don't be late!" a male voice said over the speaker.

*Scene Change, Backstage*

Alvin groaned as he plopped down onto the seat. "I'm sooo tired!" he complained. A paw on his shoulder made him look up. Standing over him, was Simon. The blue clad adjusted his glasses and gave a warm smile.

"Are you really that tired? Aw shucks. I guess I won't be able to give you my little surprise." Simon said.

Hearing that, Alvin bolted upright, eyes wide with curiosity. "A surprise!? I'm suddenly not tired at all!" he said.

"Simon chuckled and took Alvin's cap, placing it onto his head. "Theodore's agreed to handle the autographs first. We've got some time alone…" he whispered into his older brother's ear.

The red clad chuckled as he looked into Simon's eyes. "We've never done this kind of thing without Theodore… Are ya sure he wouldn't mind?" he asked.

Simon nodded and gave Alvin's cheek a quick kiss. "Trust me. Now come on!" Simon said, pulling Alvin to his feet.

"You're horny, aren't you Simon?" Alvin asked as Simon walked into his dressing room. Without answering, the blue clad disappeared through the door, winking and beaconing the older munk. Alvin tried opening the door, but Simon had locked it. "Gimme a moment to get ready!" he called.

Alvin just smiled and shook his head as he waited. He began to hum to himself when he heard the faint 'click' of the lock. "Come in!" Simon called in a singsong tone.

Alvin bolted inside and stopped dead in his tracks. Complete darkness met his gaze. His blue eyes darted back and forth. "Simon? Why'd ya turn off the lights?" Alvin asked, trying to find the light switch.

No answer.

Something brushed against his cheek, soft and warm. Alvin chucked, kinda nervously, to himself. "So that's how ya wanna play, eh Si?" he said.

Still no response from the tall munk.

The red clad let out a surprised gasp as his pants fell down to his ankles. Next, his shirt was yanked away. Alvin stood in his underwear, blushing softly.

And suddenly, the light flashed back on. "There. Much better." Simon said.

Alvin looked at his brother, and he could have sworn his jaw dropped right to the floor. Simon stood by the door, completely naked, save for a pair of light blue socks on his feet. His cheeks had the slightest trace of a red blush on them as he looked into Alvin's eyes.

Peering down, Alvin saw his brother's throbbing erection, dribbling clear precum. Grey eyes half closed, a seductive grin spreading on his face, Simon stepped toward Alvin, his hips swaying a little bit. "Hey Hotshot… See something you like?" he asked, his voice in a sexy growl.

Alvin only stared at his brother's naked form. Simon shook his head and planted a gentle kiss on his cheek. "Snap out of it, or no sex for a week." He whispered in his ear. Alvin shook his head a few times and pulled Simon into a hug.

"Sorry Si. You're just so sexy when you're nude… I just got lost while lookin' at this wonderful body of yours." He explained.

Simon hugged him back and sighed softly. "It's alright sweetie, but I would like to see you nude as well." He said, giving a tiny smile.

"Then how about… You help me out?" Alvin asked as he took Simon's hands into his own, placing them on the waistband of his boxers.

"Hehe… Gladly…" Simon replied, dropping onto his knees. His nose bumped right into the bulge of Alvin's underwear. "My my… It looks like someone's pretty excited, isn't he?" Simon asked, giving the top of the bulge a few quick sniffs. His grey eyes seemed to sparkle as he inhaled the scent of male arousal. "And it looks so uncomfortable, what with being held down so tightly…" he muttered. In one quick motion, Simon slid the garment downwards until it clung around Alvin's knees.

His 7 inch long cock was standing stiff, throbbing ever so slightly against Simon's nose. "There… Isn't that much better?" Simon asked. The older munk nodded in response, giving his member a soft stroke. "Locked, loaded, and Ready to fire." Alvin answered, grinning.

"Good. Because I want you to shoot it hard." Simon said, taking the very tip of Alvin's penis into his mouth and sucking it lightly.

The capped munk moaned as quietly as he could as pleasure slowly ran through his body. Precum began to drip into his sibling's warm, wet mouth, who swallowed the slick fluid as fast as it came out. Alvin couldn't help but buck his hips forward, sliding more of his rod into Simon's maw. "Aaahh yeaaaah… Suck it Simon…" he moaned, eyes fluttering closed.

'Time to… kick things up a notch or two…' Simon thought. He looked up at Alvin's face and smiled inwardly. His lover's face had a light blush, his mouth opened, letting out more, sweeter moans of joy.

Alvin's eyes snapped open and he let out a loud squeal. Simon was massaging his balls, the fur on his hand tickling the sensitive sac. "Oh God Simooon! Don't stop that!" Alvin whined, grabbing the back of Simon's head. He started to thrust in and out of his hot mouth, tongue dangling from his own.

His eyes widened in surprise at Alvin's sudden move, but Simon accepted it anyway. He dragged his tongue along the underside of Alvin's meat, getting another splash of pre down his throat. "Mmmmnn…." He murred. Alvin's taste danced all over his tongue and filled his mouth. The very smell of Alvin's balls as they lightly tapped against his face was sending his mind into a spin. Simon felt his own erection begin to leak with sweet preseed, quickly forming a clear puddle between his knees.

"Oooohh…. I-I'm almost there Si…" Alvin panted. Suddenly, he pulled his cock out of Simon's mouth, panting heavily as his nearing climax died away.

"Alvie? Why'd ya stop?" Simon asked, precum trickling from his mouth.

"Because, silly munk, I wanna cum with you… and… I want you in me… right now…" Alvin answered, helping Simon to his feet.

Grey eyes twinkling happily, Simon pulled his older brother into another desirous kiss. Alvin let out a satisfied sigh through his nose, happily returning the kiss. He gasped as Simon's warm hands barely touched his chest, caressing the flesh, just enough to make him shiver in excitement.

Simon broke the kiss and pulled Alvin into another hug, one hand grasping his brother's right butt cheek, groping and squeezing it, making Alvin squirm in his loving grip. The blue eyed munk let his head tilt to the left, exposing the soft skin on his neck to Simon. "P-Please…" Alvin begged silently, whining in pleasure as Simon clasped his hand around his other buttock, the pleasure making his penis grow harder with every clutch on his rump.

"Of course cutie…" Simon whispered, softly nibbling on Alvin's ear. The cap wearing boy shivered again as Simon's hot breath made his ear tingle. Simon planted a kiss on Alvin's neck, sucking on the skin beneath his fur as he searched for something. When Alvin tensed up and let out a loud, long moan, Simon laughed on the inside. He found what he was looking for. Alvin's pulse. He continued to suck on his brother's pulse, blushing as he felt Alvin's dick, now hardened again and throbbing, brush against his thigh.

Alvin whimpered blissfully as he squirmed again, his mind lost in the felicity. "S-Simonnnn… It's hard agaaain…" he groaned, eyes fighting to stay open.

"I know Alvin… I'll take care of you really soon…" Simon promised, breaking his kiss with the older munk's smiled at the rise of skin left from his loving mouth. "Well now… This looks sensitive…" Simon whispered directly into Alvin's ear. His older sibling gasped and wailed loudly in rapturous pleasure as Simon lightly bit the bump.

"Please stop teasin' Si… I really REALLY need you in meeee…" Alvin whined. "Alright. Lean against the wall." Simon instructed.

Excited, Alvin nodded and pressed his front half against the soft, velvety carpeting on Simon's wall. Giving a chuckle, Alvin scooted his rear end closer to Simon, a thin trail of precum leading from the wall to the pink tip of his erect munkhood. "Come and get it!" Alvin said, wiggling his ass in a seductive manner.

The taller boy smiled as he wrapped his arms around Alvin's wais.t He spread his legs a bit and rubbed his cock against Alvin's anus, preseed already dripping into Alvin's hole.

"Si… please wait…" Alvin begged.

Simon backed away from Alvin, worry filling his grey gaze. "What's wrong baby?" Simon asked. Alvin shook his head. "Nothing's wrong sweetie. I'm just tight back there. Here, use this." Alvin answered, grabbing a jar from his pants, tossing it to his little brother. Simon blushed and chuckled nervously. "O-Of course… How could I have forgotten?" he said, opening the jar of lube, slathering the sleek substance onto his erection.

The shorter munk let an amused grin spread over his cheeks. "Was my beloved little brother worried for me?" he asked.

Simon slapped Alvin's rear, making him squeak and moan. "Of course I did silly munk. Simon replied. "Now bend over for me and lift that ass." He said.

Alvin let out the cutest giggle he could manage as he got onto his hands and knees. "I'm all yours, big boy." He said. Alvin reached behind himself and spread his butt cheeks, presenting his puckered butthole to Simon.

With a grin, Simon mounted his brother, the tip of his erect penis prodding Alvin's asshole. "Now how can I possibly say no to such a kind offer?" he asked.

"Ya don't. Ya just fuck me." Alvin answered, winking at Simon as he lowered the front of his body to the floor, raising his rump closer to Simon's abdomen. "Now… please take me." Alvin said, his blue eyes widening as he looked directly at Simon.

Simon nodded. "Alright Alvin… but you know I never last long when I'm on top…" he said. Without warning, Simon slammed his prick all the way to the hilt, moaning loudly at the top of his voice as Alvin's tight walls clamped down on his length, milking it for his pre.

"Oh God yessss! Fuck me Simon!" Alvin howled, digging his claws into the carpet for grip. He tipped his cap so that it covered his mouth, moaning uncontrollably into the hat as Simon drove his cock in and out of his asshole.

A low grunt emitted from Simon as he lifted Alvin to his feet, hugging him from behind as he fucked his brother's butt as hard as he could, his tip prodding Alvin's prostate and spraying precum with every thrust. "Oh damn… even with the lube… you're tight as a drum!" Simon gasped. Precum continuously shot out of his member and into Alvin's hole, making it a little easier for him to pleasure his older brother.

Alvin whined and moaned as he tried to contain the pleasure that threatened to overflow his body. Each of Simon's thrusts were making his own hips move forward, as if he was humping the air. Silvery strands of precum spurted from his cock every time Simon's dick rammed and grinded against his prostate. Alvin let out a loud scream of pleasure as he got closer and closer to sweet release.

"Oh fuck… Oh damn… Simon… I think… I'm gonna cum…" he managed to say, drool running down his right cheek.

Simon grunted again and thrust his member in Alvin as deep as he could. "I'I'm cumming Alviiiiin!" he squealed. Giving a few more powerful thrusts, Simon wrapped his arms around Alvin in a tight, loving embrace as his cum erupted deep within his brother, filling his ass and seeping into his tummy.

"Can't… hold iiiiiiit!" Alvin whined as several long, thick strands of white cum sprayed out of his cock, landing on the wall in a sticky mess. He panted heavily as his belly started to extend from all of Simon's semen.

As their afterglows died away, Simon pulled his wilted member out of Alvin's rump, giving his brother a quick kiss on the cheek.

Alvin looked into Simon's eyes and smiled. "I love you, ya big brainy chipmunk…" he said, leaping into Simon's arms. Surprised, Simon had to snap out of his afterglow to hold up Alvin, who had cum leaking from his asshole. "Do you love me?" Alvin asked.

"Of course I do. But next time, we really must invite Theo…" Simon answered, kissing Alvin's nose. While the two laid down on the floor, a round of knocks sounded on the door.

"Guys! We're going on stage in ten minutes! What's takin' ya so long in there?" Theodore's voice shouted with a tone of urgency. "Hurry up! If ya don't come out now, we'll be late!" he said.

The two broke from their embrace and rushed to put on their clothes, though Alvin couldn't find his signature red cap. He looked around the room frantically for the beloved cap.

Simon opened the door, cleaning his throat as his eyes met Theodore's. "Alright Theo. We're coming now." He said. "Uh… Simon? Why are you wearing Alvin's cap?" Theodore asked, pointing to Simon's head. The blue clad tensed up as he removed the cap, blushing slightly as he tossed it to Alvin. "Oh… No reason at all Theo… trust me…." Simon insisted.

"Sex between shows, again?" Theo asked.

"Yes…" Simon answered, looking away to hide his blushing cheeks.

"Hehe, who was on top? It was Alvin, wasn't it?" Theodore asked.

"Let's save the questions for when we get home." Simon insisted, making his way towards the stage.

Theodore sighed and looked at Alvin. "So. We're you on top?" he asked.

"Nah. We changed it up a bit." Alvin answered as he and Theodore walked back to the stage.

A/N

Yea! Did you readers enjoy? I hope ya did! Tell me the form of a review, or one million dollars. Either way is accepted. KRS, Out!