“You’re late...” Kristen looked at Rayna with a worried expression. “Something the matter?” Rayna shook her head. “No, I had to set up something for a friend of mine. Your sister’s out finishing up that stuff now.” The half-succubus dragon and the female Latios had plans to hang out for a while, but life kept getting in the way until today, the two finally having some alone time. Rayna walked into Kristen’s home with a smile. It wasn’t a large place by any means, but it was enough for a college student with no roommates. There was a kitchen/dining room, a living room, and a bedroom, as well as a backyard, though the two chose the dining room to hang out.


        They sat and talked while having drinks, sharing stories about their current lives. The two spent hours chatting about a variety of subjects. Dance competitions, college life, and even Kristen’s minor addiction to gacha games came into discussion (even if her favorite was soon to end service). There was also a bit of talk about lewder subjects, such as Kristen’s constantly growing breasts, hidden behind a compression bra. The two had no shame when they were together; the very nature of Kristen’s being meant they couldn’t exactly hide that sort of thing. Especially when Kristen got drunk. Rayna, being a Psychic-type Pokemon, was very resistant to most poisons and harmful drugs, but Kristen was kind of a lightweight. And that’s how the bet came to be.


        “Soooo, Rayna… Michelle, eh? You like her, don’tcha?” Rayna blushed a bit. “Yeah, but… She’s too busy to talk these days. She’s doing a psychiatric help program and has been off the grid for a while. Why?” Kristen laughed. “Since you haven’t seen her in a while, you probably haven’t practiced getting as big as possible before you pop, huh?” And with this, Rayna sighed. Kristen was the only one she’d told about how she’d started experimenting with popping, taking off the enchantment that allowed her body to get so big without it, though it was mainly for Michelle, an Absol girl she liked, and she always came back after it. 


        Rayna and Michelle had known each other for a long time. The dragon-like Pokemon had met her on vacation, on a far-off island that, for some inexplicable reason, was only accessible by those able to inflate. As the two got to know each other, Michelle invited Rayna to check out a club back on the mainland that she ran, something the psychic couldn’t resist checking out. It was at this club where they really got to know each other well, and Rayna developed feelings for the canine Pokemon.


“...Well, you’re not wrong about me being out of practice. What are you trying to say?” Kristen left the room, coming back with a handheld bike pump. The pump had Rayna’s name on it, and she remembered she’d brought it over to help with something Kristen’s sister Shay needed help with. Apparently, her friend Nadia had made Shay the new head of her “Self-Inflating Android” project, and Shay used the pump to figure out how to maintain SIA. But now, she didn’t need it anymore, and Kristen was free to give it back. “I’ll make you a bet. If you can take your pop protection magic off and inflate yourself to… let’s say, 20 feet, I’ll give you fifty bucks. If you pop before then, you owe me the same amount. Deal?” Rayna thought for a minute, then nodded and took the air pump.


        The two walked outside, to Kristen’s backyard. It wasn’t much, primarily consisting of a large grassy field with a few trees around it, as well as a gazebo in the corner with a few chairs. After heading out, Rayna put the hose into her mouth. She held the pump in one hand, and began pumping with the other. Pfft… pfft… pfft… The pump was slow going, but it did the trick; her belly was slowly beginning to puff outwards. Kristen watched as the pump slowly but surely filled out the Latios’ belly, smiling with excitement. “I already know you’re gonna get horny from doing this, so do you think I could-” Rayna interrupted, taking the hose out of her mouth. “I already know what you’re going to ask, and yes.” Putting the hose back in her mouth, she began the process of filling up again. However, she decided to make more of a show of the whole thing, pumping herself up slowly while her hips swayed to a non-existent beat. If the half-demoness was going to consume the sexual energy her little performance provided, she’d make sure to put on one hell of a show.


        It was still slow going, but Rayna didn’t care. What mattered at the moment was the slow movement of her hips, the excited expression on Kristen’s face, and the intermittent hiss of the pump as she filled up more and more, her tank top growing tighter. ...Oh, shit, her top and bra. She was getting so into it that she’d forgotten to take her clothes off! She pulled and pulled on her shirt, but it wouldn’t come off. It was too snug. But seeing the half-succubus stare longingly at the way that green shirt slowly filled out, she came to realize that this worked in her favor. So she continued going, pumping and pumping. Slowly, as her stomach reached the size of a beach ball, the stitches began to rip, when suddenly, SNAP! The base of her tank top broke, exposing her belly to the excited dragon. “Whoops. At least I’ve outlasted this shirt…” Kristen laughed at this remark, and walked closer. She began squishing the Pokemon’s belly as hard as she could, and suddenly, another snapping sound could be heard as Rayna’s breasts suddenly jumped up a cup size. The air being displaced from her belly had snapped her bra, and was now threatening to destroy her shirt entirely! Rayna just kept pumping more and more, her breasts swelling out a lot more now and starting to squish through the neckline and arm holes of the stressed tank top. All of a sudden, it snapped in two, the two pieces of her tank top lying on the ground in front of and behind her. Though she wasn’t done yet. 


She pumped more and more, belly starting to fill again. As her body filled out more and more, her breasts soon reaching two feet wide each, it became harder to pump. Clenching the tip of the hose between her teeth, she tried to speak without letting it go, lest she be unable to put it back in. “I cah’t do thish anymore! Iss getting harder to reach!” Despite the slight difficulty, Kristen understood fine. “Just use telepathy to talk and telekinesis to keep pumping. I didn’t say you couldn’t use ANY magic.” The Latios closed her mouth around the hose again. “[Oh. Why didn’t you just say so in the first place?]” She let go of the pump, and pressed it into her cleavage, where she continued to pump more. This time, she began to slide it in and out of the canyon between her breasts, which started to turn her on more and more as the “hiss, hiss, hiss” continued from inside her cleavage now. The energy began to flow into Kristen, who wasn’t expecting it. “Well, you started way earlier than I thought.” “[What kind of show would this be without something like this?]” Kristen nodded, and walked over to rub Rayna’s now four-foot-wide belly. The psychic dragoness loved it, moaning softly as her friend rubbed. Rayna was starting to have trouble seeing anything in front of her, but her partner moved to the side to help the two keep an eye on each other.


Once Rayna’s belly reached five feet wide, breasts reaching three feet each, Kristen came to a realization. She was going to lose the bet! Rayna didn’t even feel close to popping, the excited feeling was mostly from rubbing her massively inflating belly and thrusting the air pump between her cleavage. The eight-foot-tall dragon was matched in height by the three growing feathery orbs, which were only growing bigger and bigger. But she didn’t care. Rayna’s arousal was generating so much energy for her to absorb, it would be intoxicating if she wasn’t already drunk. As she rubbed Rayna’s breasts, she heard a soft “squeak, squeak” sound as they pressed against each other, even with the feathers covering them. It felt amazing to have such a huge balloon in her backyard, growing just for her. Rayna didn’t stop, continuing to pump herself bigger and fuller with every passing moment.


Seven feet wide. Her belly only kept going and growing bigger, letting out loud creaks as her breasts passed five feet. There was still a lot more to go, though. Yes, she felt taut, but not tight yet. Then the rush of pleasure hit. Oh, god, it was amazing! Rayna was unable to stifle a moan, even with the hose in her mouth, as she swelled further and further outwards. And she didn’t intend to stop now. Kristen started to climb up on top of Rayna’s belly, causing far more pleasure for the growing Pokemon. She was just barely holding onto consciousness, most of her mental power going to telekinetically pumping herself bigger and bigger. She didn’t care about the bet anymore, what mattered now was just getting huge. The feeling of her friend’s hands against her swelling belly amplified the feeling even more.


By now, her breasts had reached six feet each and her belly was nine feet. As Kristen sat in Rayna’s cleavage, hearing the steady “hisssss” of the psychic dragon’s nipples beginning to release the air trapped in her body, she conceded. “You win, Rayna. You can stop now.” Rayna replied telekinetically, “[I know, but I’m not going to. I’m not done yet.]” This was so much of a turn-on that she didn’t want to stop. And so, she continued to fill, generating more energy for Kristen. The half-succubus was getting worried, sitting between the three huge orbs as they slowly filled more. Creeeak… That didn’t sound good at all! As Rayna’s belly reached eleven feet, her hissing breasts reached about seven. And the pleasure was so overwhelming! The purple dragon felt the surge of energy starting to rush into her, and slid off the Pokemon’s body just in time. Because as soon as she did, Rayna let out a loud moan, then BANG!


Kristen was thrown back by the rush of air coming from the burst. But more importantly, there was so much energy left over from it! She couldn’t handle all of it… She started to head back in, but it was too late. Rayna had always been pretty fast at reforming from bursting, and with a flash of light, she was back, and her reformed body sent the rest of the massive wave of energy into Kristen, who wasn’t even to the door yet. Rayna looked over at the dragoness with worry, but that expression faded once she saw the confident expression on Kristen’s face. “Y’know… I do need a bit of practice too.”


Slowly, Kristen’s belly started to swell, a quiet “hiss” quietly welling up in her body. She was still learning new things about the ability she’d discovered a few months ago at a New Years’ party, including the fact that an excess of energy could cause it to spontaneously activate and run out of control. And that’s precisely what it was doing at that moment - inflating Kristen with a huge amount of helium!


Kristen fiddled with the clasp to her bra underneath her shirt, as well as two more that held the shoulder straps together. This wasn’t something most bras had, but the one she had needed them. Suddenly, her breasts swelled out as her bra fell out from under her shirt, which stretched so much it revealed the dragon’s slowly filling stomach. “What the? ...Oh yeah, compression bra. Right,” Rayna said as she ran her hands over the half-demon’s naturally beach ball sized breasts. Outside of the compression bra, they were very sensitive, so with each time Rayna pressed against them, Kristen gave a soft moan. 


As Rayna squished the huge breasts, Kristen’s belly swelled out more and more with each excited moan. Arousal helped to speed up the process, and the sensation she felt from the groping didn’t exactly help to stop it. More and more she filled up, her belly soon reaching two feet wide soon. “Looks like the tables have turned, huh?” Rayna laughed quietly, and Kristen gave a quiet giggle. “Yeah. I haven’t had this much fun in weeks.” In response, Rayna gave Kristen a hug, partly because it was nice being with a friend, but partly to press up against her slowly swelling body. Her belly responded with a quiet hissing sound, giving another quick burst of growth.


Slowly, Kristen’s body grew more and more, breasts joining in once her belly reached four feet wide. They were already massive, but that wasn’t going to stop their slow growth, helium starting to hiss from her nipples as the huge fluffy orbs filled and filled. Rayna was almost tempted to put her mouth on one and inflate alongside her, but one time was enough for one day. So instead, she decided to start rubbing the thumb-sized nubs through Kristen’s shirt, the fluffy dragon moaning in bliss as another spike in growth speed came in.


It was at this point that Rayna decided to speed things up, squishing and rubbing harder and harder. A simple enchantment stopped the helium from leaking out, too. Kristen couldn’t handle the enhanced feelings of pleasure, moaning out loud as the hiss of helium filling her body grew louder, and soon, SNAP! Her shirt burst completely off. Before long, her belly reached 8 feet wide, with each breast now double their original size. The impressively stretched orbs were pointing upwards, like balloons tied to a fluffy, draconic tether. “Ahhh… Mmmh… R-Rayna? Please… ohh… climb up… I don’t… ahh… think I can stay… nngh… on the ground any longer…” The Latios, chuckling, did as requested and climbed on top of her friend’s bloated belly, being able to climb on much earlier than Kristen could climb hers due to her smaller height. Each pull on her fur felt amazing, her taut skin having lost any sense of pain and only being able to feel pleasure. By the time Rayna had climbed on, Kristen’s belly had jumped up to 9 feet, with each breast half that size. It was like sitting on an air mattress with a fluffy blanket on top, soft yet somewhat hard to squish into. Though soon, the dragoness’ body began to shift, and the Pokemon scrambled to stay on top of her belly. Kristen’s belly and breasts were so full of helium she was starting to slowly rise into the air, even with someone else on top of her! 


Slowly but surely, they rose higher and higher into the air, and Rayna let up on the breast-sealing enchantment. The feeling of helium beginning to escape her nipples was enough to make her belly swell to twelve feet, sending them higher into the sky. After this, Rayna decided to just relax on top of her friend’s belly, trying not to make any moves that would cause her to fill faster. Both of them could use a rest for a few minutes.


Rayna stared out over the city as the two kept rising higher and higher. The heights were almost dizzying, but she didn’t care. She was born for high places, even if she couldn’t exactly reach them anymore without the help of inflation. Kristen had nothing to say, being lost in the feeling coursing through her massive body. She was getting so huge, so full, so floaty! And it felt amazing!


A few more minutes relaxing, and Rayna figured that was enough. She pulled her phone out of her pocket and opened up an app she used to make sure the features worked after going up to particularly high places. Placing it against Kristen’s belly, she activated the vibration test. The vibrations from her phone made Kristen moan loudly, the hissing in her body mixing with the “bzzz” sound from the phone. The sensation rippled outwards through her body, filling it up faster and causing her belly to reach 15 feet, her breasts consistently staying around half that size.


Soon, they reached a layer of clouds, Kristen thinking of another friend as they slowly soared through the air. It was always a surreal feeling to be up here, no matter whether she herself was inflated or she was on top of someone else. It was almost a thrill, being higher than anyone without wings would dare to go. Sure, it was one hell of a turn-on, but through the excitement, she had a slight moment of clarity. Seeing the world upside-down, as she hung from her massively inflated belly and breasts, was vertigo-inducing, sure, but wow, it was amazing.


Soon, the pressure started to get to her. After her belly passed eighteen feet with nine-foot-wide breasts, the feeling of the stretched skin alone was enough to get Kristen stuck in a pleasure feedback loop, the inflation causing more pleasure which just caused her to inflate faster. And those noises didn’t sound good, Rayna thought as a soft “creeeak” filled the air. As the 20-foot wide dragoness reached the peak of her arousal, she burst. Scraps floated down, only to disintegrate as she started reforming… and falling! Rayna, thinking quickly, made sure to hang onto Kristen as they dropped through the clouds and towards the earth below. Soon before they could slam into the ground below, Rayna activated her Levitate ability to slow their fall just enough for them to not get hurt. And in the brief ten seconds it could be used… ...it worked!


Once Kristen fully reformed, she found herself in Rayna’s arms, the Pokemon girl dashing across the city as fast as she could. And considering Rayna was an Eon Pokemon, that was pretty damn fast. She weaved in and out of traffic, though she kept herself invisible to most folks so that the two would stay safe even without their clothes. Soon, they made it back to Kristen’s house, and after grabbing some fresh new sets of clothes, they talked a bit more. 


Kristen sighed. “Well, Rayn’, you got me. Forty bucks, like I promised. I’ll be right back.” But Rayna grabbed her arm as she started heading to her room. “Kris, you don’t need to. I’ve caused you so much trouble already, just from one silly bet. You don’t owe me a thing after what happened.” Kristen shook her head. “But I’m the one who started it. I’m the one who goaded you into inflating so big you popped, which led to you getting so horny I started inflating too. The least I can do is-” But the Latios held up a hand and stopped her. “Listen. I’m the one who took the bet, and I was sober. I made a dumber move. Don’t worry about it.” A bit more back and forth, and they agreed to leave it at that and just finish their visit. 


Kristen awoke in her bed the next day, with a pounding headache. She tried to remember what had happened last night, and winced. Even the act of trying to remember who was with her last night was tiring… ...wait. Rayna was there, the two had drinks, and… ...oh, god… How many people could see her floating through the sky, drunk and horny as hell yesterday? ...Oh well. It’s not like that was the strangest thing they’d seen in their lives, right? With this thought in her head, she laughed it off and went to go start nursing her hangover.