Sudden Threesome Rouge was going towards Tails's lab, wondering why Shadow asked her to go there. The busty bat sighed since Tails had always freaked her out, despite her slight interest towards him: between his “unintentional” gazes at her boobs or butt, his “accidential” gropings of said curves and his huge collection of naughty trinkets, Rouge didn't knew why was his mind so sex-centered, then again she relly couldn't blame him for trying to grope her everytime. She was the only female Mobian in G.U.N., so of course she had caught his attention. She sighed and slapped her face, calming herself down as she walked inside the laboratory. “What the fuck?” she asked, as she saw the place completely turned upside down: tables turned over, papers allover the place and stains of several colored liquids on the walls. (Either the guy sucks at cleanings or something very wrong has happened in here...) she thought as she flapped to the first floor, where Tails's room was. She sighed more, since that was where Tails kept all of his naughty stuff, then as she opened the door she found Shadow in front of her, covered in dust and with his fur all messed up. “Alright, I'm here... Why did you called me here?” asked Rouge, folding her arms below her more then ample chest, secretly thinking that, no matter how he looked, Shadow was always as hot as the Sun. “You'll see... Come in” he said, Rouge couldn't help but notice the giggle on Shadow's voice as she walked in, swaying her generous hips a bit as she followed him. “You know that shapeshifting tech Tails was working on?” he asked. “Yes, why?” asked Rouge, tilting her head “It doesn't work?” she added, sighing but then gasping as she saw that Tails was now a female, with the same huge curves that Rouge sported. “Oh, I think it works even too well...” said Shadow snickering as he watched Rouge's reaction “Hey, Rouge” said Tails, or Tailsko as Shadow renamed her, waving and blushing a bit as she was naked since no clothes could fit her new huge form “Surprise” added the busty foxy girl, giggling embarrassed. “Is this for real?!” asked Rouge to Tailsko, walking towards her and taking a look at her curves, who were exactly as smooth as hers. She pouted a bit and placed her hands on her hips. “Let me guess, you wanted to feel what it's like to be me?” asked the bat. “Uh... Sorta? And I gotta say, you are extremely strong, because you carry so much weight on your shoulders... Literally...” said Tailsko, getting up and showing how unbalanced she was. “Pft, newbie... Well, why don't you turn yourself back to your regular, smaller, nerdy self?” Rouge huffed, since she found the whole ordeal even creepier than regular Tails. “It's not that easy... The machine had an energy overload and busted... I'm stuck like this until it's repaired...” said Tailsko with a small whine, since despite being this curvy she kinda missed being his old self. “Then repair it. You're supposed to be a genius, right? Or did all of your brains slipped in here?” asked Rouge, groping Tailsko's massive boobs, finding out that they were also as soft as hers and adding more to Rouge's discomfort. “N-no, but I need the materials t-to fix it... U-uhm, c-could you n-not grope them, please?” Tailsko asked, wincing a bit, which only made Rouge fondle her huge udders more. “Well, you can always use yourself to raise some money... That'll teach ya to act like a pervert...” said Rouge, smirking a bit, to which Tailsko lost it a bit and pushed down Rouge's heart-shaped top, along with her bra and letting her huge boobs flop around. “W-well, maybe you c-can help out with y-your slutty body...” she whined, groping Rouge's boobs while being groped herself. Rouge closed an eye as her tiny hands groped her. “Are you fucking calling me a slut, whore?!” Rouge hissed, gritting her teeth and pinching Tailsko's nipples, making her whine more. “W-whore is who a-acts like a w-whore...” the busty fox moaned, doing the same with Rouge's nipples, making her moan. “I'm n-not a whore!” hissed Rouge, trying to not be turned on by that. “Y-you acted l-like one t-to me...” whined Tailsko, starting to push her huge boobs against Rouge's own huge boobs. “I d-did not... You a-always acted p-pervertedly towards m-me... But I'm h-happily engaged... W-with someone w-who's ten t-times the m-man you ever w-was... Come t-to think of i-it, this f-form may s-suit you more... N-now you a-also look l-like a w-whiny little b-bitch...” said Rouge, smirking as she pushed against Tailsko's boobs and moaned as their nipples pressed against each other. “Damn...” said Shadow, who couldn't believe that Rouge could be this poisonous. Tailsko teared up and pushed harder, being helped by her tails, managing to push the busty bat down and letting her be on top. “T-this is w-where you b-belong, you bitch! Under my ass!” she shrieked as her tails wrapped around Rouge's arms, pinning them to her sides. Rouge growled and locked her thighs against her neck and pulled down, tightening as she tried to make her pass out. However, Tailsko managed to take a good hold on her ankles and pulled them away from her neck, then she sat on Rouge's boobs and squashed them with her fat ass, making her moan and squirm in the tails's soft yet firm grasp around her arms. “LET ME GO, YOU BITCH!” she hissed, then they were separated by Shadow, who had a huge hard on gotten by watching them fight. “I think that's enough, you two! Rouge, you better apologize to Tailsko! Hat you saud was mean and unnecessary!” he said, grunting “And you, Tailsko, you better stop ogling at my girl's curves when you get back in your body or I'll beat your ass!” he said to the fox. They both looked down, sighing as they knew that Shadow was right, then they took a good look at Shadow's hard dick and, wih just one smirk, they decided what to do. While Rouge teared off Shadow's clothes, Tailsko injected him with the twin cock serum, making him grow a second dick, as big as the original. “Mngh... what do you think you're doing?” he asked as they both got on their knees “We still have a score to settle.... So we'll use you as our tie-breaker. Whoever wins, is the best woman” said Rouge grinning. “It's the only way...” Tailsko nodded, then they both widened their tits and took his dicks between the four huge mass of fat and fur, making him moan. “Mmmrrrggghhh!!! W-wait!! I-It's too m-much like t-thissssss!!!” he gritted his teeth as their combined warmth and softness almost made him lose his mind. The two busty babes grinned and took each a cock tip in their mouths and sucking them while titfucking the huge cocks with their equally huge boobs, rubbing their meats togheter along with their nipples and moaning as they dominated Shadow with ease. He groaned and squirmed against their incredible combined skills, soon he tumbld on his back, being topped by the two curvy, horny girls who sucked on his dicks like straws while squeezing them between their four udders. “A-ahn... F-fuck... T-this is... Mmmnnnggghhh...” he groaned, his cheeks were cherry red as he got milked by the two. (Gh... Not even Vanilla and Cream's combined breasts feel like this...) he thought, moaning as he could feel his dicks throb inside the warm boobs surrounding them, getting even faster with their rubbings and tighter with their squeezings. Tailsko and Rouge giggled as they plunged their tongues inside the dicks's urethras, sending even more pleasure into Shadow's brain and making his resistance crumble even more, while they continued to suck and rubb him, until eventually... “RRRRGGGGHHHH!!!!” he moaned and shot two fat loads of cum deep in their throats, groaning ass his dicks kept pumping cum in their mouths with the power of a water hose. The girls gulped it down to the last drop, not wanting to waste a single drop of Shadow's delicious nectar, then they pulled away and panted, looking at each other as their chest rose and lowered with their breathing. Before Tailsko could say anything, Rouge tackle hugged her and started to make out with her, slamming her plump lips against Tailsko's. The fox widened her eyes but son she hugged her, mashing her boobs against Rouge's and cooing as they shared that kiss while Shadow catched his breath, groaning as he had never been dominated like this before. The two girls purred as they got entangled with each other, their tongues wrapped against each other as they shared their salivas. Their boobs were a mashed yellow and tanned mess, rubbing and squishing against each others with their nipples being squashed beneath them. Soon they pulled away to breathe, panting in each other's faces and blushing madly. “W-why'd you do that?” Tailsko asked. “You are a worthy opponent, I thought you deserved a reward for making Shadow cum as fast as I do” said Rouge smiling “And also, it was for apologize... I was venomous to you for no reason....” she added, lowering her ears. “Forgiven...” Tailsko cooed, smiling and wagging her tails. “Eh-ehm...” said Shadow, who had recovered some strenght and was gazing at them, his arnms folded and his dick back to normal “If you two are done with pleasentries, I think it's my turn to dominate you two...” he said. “Oh, right” said Tailsko, getting up and grabbing a syringe filled with a new, red substance “Well, if you're gonna please us, you're gonna need this” she said giggling as she gave it to Shadow. “Another serum? Man, you are perverted...” said Shadow, injecting it without even asking what it would do. Instantly he felt an itchy sensation on his groin, which soon evolved into a far more weird feeling, kinda the same as when he used the double dick serum but amplified. He groaned and shivered before, all of a sudden, he grew seven extra penises! He gasped as the feeling was completely new, along with the fact that he now had eight huge dicks, they also seemed bigger and longer than usual. “WHAT THE FUCK?!” he asked, almost moaning, to which Tailsko giggled and Rouge just stood there, between creeped out and amazed. “A multi-cock serum?” Rouge asked to Tailsko. “Not quite...” replied the smirking foxy girl “Try to think about them stretch, Shadzy” she said to him. He raised a brow but shrugged and did so, gasping as one of his dicks elongated towards the two girls, making Rouge wince and Tailsko giggle. “What is this?” asked Shadow. “My new, and obviously effective, tentacle cock serum. It not only increases the number of cocks based on how many females surround you, but it allows you to move and stretch them at your will” Tailsko explained to an amazed Shadow. “So, eight for eight holes, right?” he asked, as a smirk formed on his face “And why tentacles? Although, it's probably a kink of yours” he chuckled. “You know me...” giggled Tailsko “Try to wrap us up in those eight bad boys and fuck us until we can't walk anymore...” she moaned out, rubbing her thighs together. Shadow nodded and closed his eyes, breathing slowly and focusing on his dicks and what he wanted them to do to them. Instantly four of them darted towards the girls and wrapped all over their bodies, securing them in a warm, firm grip. “Mngh... They're so hot and rock hard... Unbelievable...” moaned out Rouge, whose arms were pinned to her sides and her legs were tied so that they'd give Shadow free access to her holes. Tailsko was tied more or less the same way, only her arms had been tied differently since they had been restrained above her head. “Mmm... Feels good, right? Like this, we're completely at his mercy... sn't this exciting?” asked Tailsko to Rouge, slightly squirming in the hot grasp of the dicks. “M-mhm...” moaned Rouge, who tested the strength of the dicks by squirming in their hold, finding out how strong and stretchy they were. The more she pushed against them, the more they'd push back, pulsing a bit against her. “Shadow, you better move... I don't know how much energy will it take from you” said Tailsko, though the real reason she wanted him to hurry was because she really wanted to be fucked by those huge things. “Right... I hope it won't hurt too much...” he said as he made the remaining tips move towards them “D-don't worry, the tentacle serum gives your dicks the ability to fit in any hole, no matter how tight... So don't you dare hold back...” she moaned, to which the Ultimate LifeForm grinned and made the remaining dicks go deep in their pussy and ass, making the two girls moan loud since they were just so big despite their more than easy insertion, then the tip of the dicks coiled around their bodies prodded their nipples before going deep inside them. “MRGH?!!” Rouge moaned as she felt the huge things jammed inside her boobs. Tailsko moaned loudly too, feeling the dicks penetrating her boobs, a place not meant to be penetrated, though it wasn't the first time she was nipple fucked. Shadow grinned and strated to ram his dicks inside the tight, wet, warm holes, moaning slightly as he felt some of his energy drained with each thrust. (Damn, this serum is taking a lot out of me...) he thought as he banged them, still showing an amazing feat of strength and resilience to the girls, whose minds started to wander the more they got fucked by the insanely huge dicks jammed inside them. Shadow smirked as he decided to try something: he ordered the dicks in their asses to move upwards, towards their stomachs. “MMRRGGHH?! W-WHAT ARE Y-YOU... GGGHHHNNN!!!” Rouge moaned as she felt the huge dick make its way in her intestine, the thing was so big that Shadow could see the outline of it as it slithered upwards. “I-I WASN'T E-EXPECTING IT... GGGRRRNNN... MMMRRRGGGHHH...” Tailsko moaned as she could feel it wriggle and slither in her belly, heading up, up and not seeming to stop. Rouge was slightly scared about it, but still didn't wanted it to stop as she felt it occupy the tight space of her throat and making her gag as it was extremely big for the confined space. Soon, both dicks popped out of their mouths, making them pant and gag as they now had to breathe through their noses if they didn't wanted to suffocate. “Hehehe, neat... Now...” he said as the dicks coming out of their mouths started to wrap around them more, coiling them together and covering almost every part of them, leaving only their noses out so that they could still breathe. “MMMGGGHHH... MMMNNNFFF...” they moaned as they got covered by the smelly, thick and hot dicks then they felt them tighten around their bodies as their “brothers” increased the humping speed on the girls's cum-craving holes. The dicks fucked the girls so hard that Shadow feared that he could rip them in two but he was feeling too good to stop. The mating continued for an impressive ten minutes before Shadow started to feel drained and his dicks throbbed insdie the holes of the girls, who could only moan and wriggle between the tight hold of the dicks and their relentless abusing of their holes, then they came, wetting Shadow's dicks with their juices. Shadow grinned tiredly before... “MMMNNNGGGHHH!!!” he moaned, gritting his teeth and releasing eight huge loads of cum on and in the girls, the cum erupted in them in such quantities that it bloated their boobs and bellies of several inches and made her moan and writhe more in his grasp. Shadow panted and fell down, completely emptied of any energy, while his dicks slowly vanished, returning to be one single big dick and setting free the now more than satisfied girls, they too panted deeply as they catched their breath, their bodies were stained of cum and their boobs and bellies had been inflated greatly by the cum dribbling out of them right now. Soon tiredness took over them, making them fall asleep, drained of any energy but with the most satisfied smiles on their bodies as they cuddled with each other, with Shadow sandwiched by the two busty babes, snoring soundly as he was squished by their warm boobs... The End