Riko's Cum Addiction

Story by bluebutter on SoFurry

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Riko finds herself with an addiction to cum and goes to the extreme to manage it.

I am new to making stories like this but I had a lot of fun writing it.


Riko was an average cat of 26 years with one major exception, she was born with a rather significant penis and was equipped with a large set of balls that hid most of her vagina. Not that she let that get in the way of her frequent antics.

She had thick brown fur that was speckled with large blue and white dots all over and smaller dots grouped on her ample breasts and groin.

Riko kept herself herself busy with various science projects, video games and reading. She was fascinated with biology and was never afraid to experiment on herself. After all, she had to pay her bills somehow. She would regularly sign up with local businesses that would pay to test out new medications or enhancement drugs. She tested everything from soaps and shampoos to make enchantments and fertility drugs.

Some would just make her feel dizzy or tired while others made her balls swell up with cum and beg for release.

She loved the roulette of unknown side effects, especially since she often ignored the warnings about using with other medications.

She was able to make enough money like this to keep her small apartment and eat a decent meal every night but it didn't help with her student loans.

She was playing video games while waiting for her newest drug to kick in when she heard the door open and someone walk in. The door was unlocked as most of her friends never bothered knocking and she would often not hear the knock through her headphones anyway. She didn't receive many other visitors for it to matter.

Riko looked over to see Ryu, her best friend standing by the door to her apartment holding a large bag with a wide smile on his face.

Ryu was a tall white fox with large purple eyes and an undercoat to match that only just shows through unless someone were to brush his longer white fur in just the right way. His long and fluffy tail ended in a patch of deep purple, the silky fur reflecting the light in the room.

Riko and Ryu were no strangers to each other's bodies and often would often have a good fuck to relieve stress. Today was no exception. Ryu sat down on the couch next to Riko and wasted no time opening the bag he carried in and setting it's contents out on the coffee table. She paused her game and watched as he pulled out bottle after bottle of various pills and creams.

Ryu mentioned excitedly as he continued to empty the bag, i got you a surprise and I know your going to like it, I even got paid up front for us to test all of these.

Riko looked at the different bottles, none of them had proper labels and had numbers crudely scribbled on them. Where did you get these? They don't look very professional said Riko. I answered a TV ad looking for product testers, they ended up sending me this whole bag and some money up front. when we report back they said we would get the rest of the payment. Here is your half he says as he hands her a large stack of bills. There had to be at least a thousand dollars, and this was only half?

Riko wasn't exactly convinced the products were safe but with everything else shes ever taken, how bad could it be. Right?

She picked out a bottle labeled 14. it contained several small blue pills. With a quick drink of water Riko took the pill and sat back down next to Ryu. The two decided to play some games together. They had a rule that loser needs to remove an article of clothing. This had 2 effects, the loser had to deal with becoming increasing indecent and the winner would get more and more distracted to keep things even. However the games always ended the same way, with the loser getting fucked by the winner. All too often they didn't even finish the game before that happened.

Several rounds went by, both were now missing various items of clothing. Riko had just removed her shirt exposing her large, round breasts. Her nipples hardening in the cool breeze as she turned to face Ryu who now had a sizable bulge forming in his pants.

Riku smirked, let's see if you can go another round before that cock of yours breaks free she said as she proceeded to sit on his lap. His bulge pressed up against her ass, Growing harder by the minute.

They started the next round in their game, Riko trying her best to distract Ryu the whole time. Grinding her hips into his package.

Before she could react Ryu reached around and grabbed her breasts kneading them playfully and playing with her nipples. Feeling his fingers sink into her soft flesh. She dropped the controller and started rubbing her own growing bulge. Before long she had to remove her own pants before they grew too tight from her own swelling member.

Ryu removed his pants and sat down on the couch, his cock standing straight up almost as tall as her torso.

Riko wasted no time returning to her spot on Ryus lap, but this time standing up she pressed the tip of his cock against her slit. Slowly pressing harder until the large member slipped inside as she let out a loud moan. As she worked the cock in and out of her slit making deeper progress with every thrust.

Ryu not wanting to let a perfectly good opportunity go to waste takes Rikos cock which is now being presented in front of his face and starts licking the tip and running his textured tongue along the underside of her shaft sending electric tingles shooting through her body.

It felt good. really good. Better then usual thought Riko as she thrusted once again, burying Ryu's entire cock inside her as she felt his balls pressing against her ass. As she picked up the pace thrusting faster and faster she could hear the audible gurgling of Ryus balls swelling with cum. She could feel his hot pre spilling into her womb as he struggled to hold it back. Every pulsing heartbeat could be felt through Ryus cock buried firmly in her vagina. Cum inside me, impregnate me! As if on cue, she felt a warm spot in her belly growing rapidly as Ryu shot rope after rope of hot cum directly into her womb. Her belly rounding out slightly as a result of Ryu's above average orgasm volume. Eventually the flow of semen came to a stop. Riko had a nice bulge in her belly from the cum. She lifted herself off the cock with a loud pop as it came free.

The two of them continued to fondle each others features until they moved to the bedroom and passed out.

The next morning Riko woke up, her mouth dry as sand and went to get a glass of water when she lost her balance and almost fell over. Her breasts and balls had grown almost twice as big overnight!

Surprised as she was, she liked what she saw, enough to be moderately turned on by her own form. She returned to the bedroom after getting her water. She quickly drank the whole glass and went back for another but her thirst could not be satisfied. As she laid back down in bed next to the still sleeping Ryu she couldn't help but notice he had quite the bulge poking out of his shorts.

Riko couldn't help herself, trying not to wake Ryu she pulled back what she could of his shorts and started licking his glans. It wasn't long until he started leaking pre that would have gone all over if Riko hadn't stuck the rest of the cock tip into her mouth and started swallowing what she could. Ryu rolled over onto his back not yet waking up, exposing more of his cock in the process. His body obviously enjoing the unexpected attention. Riko started sucking harder, pulling the cock further into her mouth. She had about half of his cock stuffed down her throat by the time Ryu woke up. Riko didn't care, she was getting what she needed the most, the only thing that seemed to quench her thirst, cum. She continued to suck on his cock, now that he was awake Riko was able to be more delibrate with her actions now that she wasno longer trying not to wake her friend up. Ryu meanwhile had no arguments, waking up to a blowjob? he couldn't ask for more.As his balls churned loudly as the pressure rose inside, he let out a gush of cum directly into Riko's stomach. As she pulled his cock out of her thorat it continued to leak hot cum which she lapped up before it could make a mess. Her thirst was satisfied, if only just for now.

Over the next few days Riko came to realize that ordinary fluids and foods no longer satisfied her. She needed more cum. Asking friends to come over and have dinner with her, or so she claimed.

She started to have close friends fill up glasses with fresh cum and leave them in the refrigerator for her to enjoy anytime, but it wasn't the same as being fresh.

She decided she should try and figure out what was going on. Thinking back to the last drugs she tested she checked the bottles still laying out on her coffee table. there was a note she previously missed, it had a phone number on it. Not having any other options, she gave the number a call.

A woman's voice could be heard on the other end. It did not sound robotic or pre recorded, so she said Hello back to the voice. The voice replied with "Hello, if you found this number you must have tried our newest trial medication." Riko replied yes, I did and I may be having some weirder then usual side effects. She explained her situation and her new found cum addiction. The lady mumbled something about how special she is, and that her side effects were perfectly normal but way different then any of the other subjects. Riko was asked to make an appointment to meet in person for some more tests and potentially a rather risky procedure that she promised would cure her of her addiction. She agreed to meet and set up an appointment for the following day. She showed up at the address she was given on the phone. It looked to be a small health clinic, inside was a waiting room and a receptionist. She let the receptionist know she was there for an appointment and took a seat. Seconds after she sat down a lady walked out and called her name. The lady had the same voice as the person on the phone earlier. She was brought back to a small office and was shown a stack of papers.

She was explained the procedure that was to be done. Due to Riko's unquenchable addiction for semen and the changes her body chemistry has gone through from years of constantly taking different untested medications, she was uniquely qualified for this test. Something about requiring modifying her nuts to help them run the tests but she didn't pay much attention. They also wanted to give her a new cocktail of drugs to take over the coming days before the big test.

Riko quickly flipped through the papers only half paying attention while the lady explained the procedure, the other half of her mind trying to think of her next source of cum. She signed the forms, anything to help her knock this cum addiction. She was lead out of the office further into the building where she met a nurse who helped her onto a specialized chair which looked like it was originally designed for birthing mothers.

Her feet were strapped in with her legs spread apart. Her balls hanging down on a small platform and her cock resting between her breasts. Her tail poked out to the side and was tucked under so it would not get in the way.

Several other people gathered around her dressed in surgical scrubs and a mask was placed over her mouth with a chilled air flow to it. She passed out.

Hours later Riko awoke laying down in a bed with a dull throbbing pain in her balls. She sat up and looked down at her crotch. Her balls were covered in bandages and looked a bit bigger then before, they also felt a fair bit heavier.

some time later a nurse came in and helped Riko get out of the bed. She was sent home with some special shampoo that was supposed to help soften her fur and skin and was told she could remove the bandages the next day. On her way out the receptionist stopped her and have her a paper for a follow up appointment. it has a different address on it and was scheduled for a week later.

Riko got home, made herself dinner and went to bed.

The next day she removed the bandages from her balls and took a shower. Attached to the sides of her 6 inch diameter left and right nuts were 2 big silver rings with a metal plug inside the rings were huge on her, if she had to guess they were almost 3 inches in diameter and quite heavy. They didn't hurt when she touched them, and wish felt really sturdy and well attached.

They weren't coming off even if she wanted then to. She decided to grab another glass of cum left to her by Ryu and hold out until her next appointment.

The week passed quickly and it was soon time to meet for her follow up appointment. She looked up the address on the paper she was given and headed out.

She was guided to a busy part of her city where a large warehouse stood. There was a large crowd of people outside. She didn't think much about it but headed inside.

Inside the warehouse was a large open room.

She looked across the room to see a large padded platform that looked more like a huge reinforced bed. The platform was surrounded by specialized milking machines with hundreds of stalls and big drain vents in the floor.

She climbed up on the platform and laid down on her back. Her balls were in the way so a worker lifted them out of the way while another pulled out a hose with a penis shaped end. It was large and had an inflatable section designed to hold it in place. The worker pushed the phallic object inside her slit, No extra lubrication was necessary with how much Riko was already dripping.

He then inflated the locking balloon preventing the hose from coming loose. Riko could feel it tightening inside her vagina, pressing tightly to her walls, tight enough that not a drop could escape.

The other end of the hose was connected to a big tank connected to the machines. It looked like it could hold thousands of gallons but it was currently empty. Another hose with a milking apparatus was hooked up to her cock. Unknown to Riko, this hose was not attached to the machine, it joined with the first hose firmly installed in her vagina.

2 more hoses were attached to the fluid ports that were installed on each of her balls and hooked up to the machines.

Riko was now ready. Soon the building was quickly filling up with volunteers eager to be hooked up to the machines.

Riko could see cocks of all different sizes with balls to match lining up for their turn to be drained of their seed into what will eventually be her womb. She couldn't help but to smile.

The worker switched the machine on as more and more volunteers were hooked into the milking machines and given a medication to increase their output volume and stamina.

She could feel the hose in her pussy start to lightly vibrate in tune with the low whirring and sucking of the machines. The room was filled with the sounds of hundreds of volunteers simultaneously climaxing, cumming, feeding the machines. The big tank on the machine started filling up with semen when a loud mechanical sound filled the room. The main pump had started.

Riko could feel the hose in her pussy start to shake, it was happening, there was no turning back, here it comes! Riko yelped in pleasure as a surge of warm cum burst out of the hose and directly into her womb. Her belly instantly began to swell outwards as gallon after gallon of fresh semen was pumped directly into her. She looked to be 9 months pregnant in under a minute. Her belly growing 2 feet across then 3 feet, now 4 feet across showing no signs of slowing down, big enough that she could feel her cock rubbing against it from below.

She moaned in pure bliss as her stomach stretched larger and larger, the flesh stretching past normal limits but remaining soft with lots of room to grow, She was nowhere near full yet.

Riko had no idea how much time had passed, was it mere moments, minutes? hours? she couldn't think straight, her mind was a haze of pure arousal. A worker came around every now and then to rub her belly, weigh her balls, and cop a feel of her breasts paying extra attention to her nipples. The worker jotted down notes on a clipboard after each "test", for science of course.

Riko's belly was now threatening to spill over the edges of the platform. With her stomach now reaching over 12 feet across, she felt fuller then she's ever been, unable to move underneath the massive weight even if she wanted to. A big lit up sign hung above her indicating how many gallons of semen she was carrying. The sign was a blur, she could only make out part of it but was able to see it was well into 4 digits already.

Suddenly a loud buzzer went off, startling Riko back to her senses. A worker shouted indicating it was time for "Phase 2" what was phase 2? she was never told about Phase 2. Was Phase 2 the final phase or were there more after? She didn't care, as long as they kept pumping more into her.

More volunteers lined up to get drained, many for their 3rd or fourth time.

The workers flipped more switches and the sound of another pump starting up rang out. She felt a cool sensation and then a sudden surge of warmth in her balls as she realized what phase 2 was. Her balls started growing, reaching beach balls size in no time. She could feel the pressure in her balls growing rapidly.

Her cock rock hard, her belly and balls still filling, she could feel her balls tighten and gurgle with new fluid a flush of warmth spreading rapidly from her groin, she was about to cum.

Her orgasm was strong as she bucked her hips as much as she could with the amount of weight pressing down on her from her oversized belly. Ripples running across her belly as she moved, but her cock only continued to leak pre as the device over her cock kept her stopped up. Her cum having nowhere else to go but back into her balls at they swelled larger still.

Riko looked over at the machines working hard to empty the balls from so many enhanced participants. Unbelievably The tank was still filling up faster then it could be pumped into her.

Riko continued to have fresh cum pumped directly into her womb and balls. Having orgasm after orgasm over and over but unable to cum. There was no telling how much bigger she would get. Her balls were groaning, gurgling, audibly sloshing as she felt them touch the cold ground several feet below her. How big are they? she had no idea.

Her stomach was approaching a massive 20 feet wide now. Her balls were over 4ft wide each already. Growing at a much quicker pace in part of her own fruitless orgasms contributing to the pools of cum they contained.

Riko moaned loudly as the worker continued to take measurements and tease her balls and breasts. Her flesh tingling with increased sensitivity from the stretching. The capacity sign above her had started flashing, she couldn't make out what it said but she heard The worker say good job. you've just passed 30,000 gallons.

As the volunteer crowd started to thin out and the tank on the milking machines indicating it was full and had started to empty.

Countless orgasms later Riko wanted nothing more then to cum. Her balls growing faster with the milking machines continuing to pump hundreds of gallons of warm foreign cum directly into her balls and every orgasm not letting a single drop of cum escape. Each of her nuts continued to grow bigger and bigger reaching 6 feet wide, 8 feet, then 12 feet. If her balls continued to produce cum at this rate they would soon eclipse her stomach in size.

Then all of a sudden there was another whirring sound. This one was different, it sounded more strained then the others. Then it happened, the device on her cock sprung to life, it created a strong pulsing suction on her cock, stimulating the over sensitive glans like she's never felt before. this went on for a while, causing her to uncontrollably orgasm several more times noticeably bloating her balls larger with each orgasm. Then there was a *click* like a great lock had been opened, Riko realized she could finally cum.

she was held back no longer. Time itself seemed to slow down. She could feel her next orgasm building. The warm sensation slowly expanding from her groin. Her balls churning, tightening, her pelvic floor stiffening, priming itself with it's first load of cum.

She felt light headed, ready to pass out as her cock demanded more resources from her body, but she held on. Her body became more sensitive, if someone had asked her she would have said she could feel every single sperm swimming inside her. Nothing else mattered right now but the pure rising pleasure.

how long had this been going on? she could not say, every moment felt like an hour until she finally came.

Her urethra bulged out as the high pressure cum worked it's way up her cock. When it reached the tip it came out with the force and volume of a fire hose. It would have made a huge mess if not for the device covering her cock as it somehow contained almost the entire stream of cum as only a small ammount leaked past and dripped down onto her balls, coating the soft fur in a layer of thick sticky cum. The rest however did not make it to a separate tank for collection like she was expecting. It flowed up the tube and joined straight with the hose lodged in her pussy.

She was about to cum directly back into her own womb. She felt as the hose in her pussy suddenly increased in volume and a warmth spread throughout her belly as the much hotter, direct from the cock sperm mixed with the warm cum already inside. Her cock rocking back and forth, slamming into her own massive stomach as her body shook from the force. thousands of gallons of hot cum straight from her balls flooded into her womb causing it to swell several feet larger with every burst from her cock.

Her stomach continued to contain the flood, expanding beyond the roped off area around her. The platform she laid upon was no longer visible under her massive stomach.

Riko's orgasm lasted for almost an hour until her balls were all but empty but to her it felt like weeks. She eventually passed out from the action. Her body still cumming uncontrollably as it worked to empty the contents of her overfilled balls.

The large tank on the machines was long since emptied into her as the pump churned at the last drops not letting anything escape.

Her orgasm finally coming to an end. The machines were shut off and the device on her cock was removed. A still constant trickle of pre spilling out all over her now much smaller but nowhere near normal, watermelon sized balls. For fear of flooding the building they kept the hose plugged into her pussy. Riko woke some time later to several workers closely examining her, pressing into her soft fur with their hands and massaging her features, running different tests and taking notes.

Her stomach now over 50 feet wide. The display above her displaying "Error".

The test was a great success.

A few hours later the building was mostly empty except for Ryu who came over as soon as he heard about the tests Riko failed to mention to him. He was blown away by the unbelievable size and amount of cum Riko had managed to fit. With help from a ladder, Ryu crawled up to Riko, rubbed her belly, Compared her now much larger balls to his own and whispered in her ear "i know you can do better, do you want to prove it?". Riko nodded indicating her full compliance and trust with whatever Ryu had planned. With no workers around to stop him Ryu reattached the device onto Riko's still hard cock, flipped some switches on the machines which reversed the flow from the tube in her pussy, and diverted it back into her balls.

She was going to have to cum the entire contents of her belly through her balls and back into her womb, over and over again and Riko had no intention of telling Ryu when to stop.