Steam hissed and puffed as the huge steel doors slowly clunked apart, leaving a wide gap for Jeena to enter. She’d done it. After months of searching, after the townsfolk all started to grow thirsty, and then fall ill, she’d located the fabled bunker where lay the treasures of a lost civilisation.

Shit yizzeah!

Water dripped from the ceiling from long stalactites as Jeena made her way deeper into the vault. Her dark brown pants were reasonably loose and airy, but full of holes – her whole body was muddy, caked in dirt. She was short for her 18 years and that allowed her access to a lot of places no one else could get to. Certainly no one ever noticed her flat figure, which wasn’t giving any kind of definition to her red vest top, that hung loosely off her flat form. All this made Jeena was an excellent scout.

But now the town was dying of thirst, no one had any money, and Jeena had been searching far and wide for any fabled bunkers from the Before. They were supposed to be laden with old treasures and artifacts, and there were always travellers passing through Mickey’s bar that would pay handsomely for anything from the old times.

And now here she was.

The thin, dark corridor was sloping downwards and the temperature started to rise. It was baking out there in the desert, but stepping into the shade had cooled her off. Now though, she was hotter than ever, and wiped a dirty brow with an even dirtier arm. She continued down the passage, drawing her pistol for good measure.

She needn’t have bothered. As she stepped out of the passage, an enormous vaulted cavern opened in front of her eyes. Blue crystals sparkled in the walls, and large holes adorned the many shelves and layers that ran around the center.

And right in the middle, atop a tall mound, stood a green, glowing container.

Jeena felt her heart start to pound. That was it!

She made her way slowly down the dirt slope, and reached the dip that surrounded the central mound like a moat. The ground was soft and moist under her feet, and there was a peculiar smell of dampness that Jeena wasn’t accustomed to. They hadn’t had fresh water in Green Springs for a long time; it was all recycled and tasted awful. This was new.

She clambered up the mound, feeling the dirt slip a little, sliding as her feet pushed herself up, until she was face to face with the green artifact. It throbbed and glowed, and she felt its light flooding over her, filling her up. It looked almost alive, tucked into this tall, metal contraption it seemed to be powering. Well, not for much longer.

Wiggling her fingers in anticipation, feeling the hot air on her fingertips as they poked out of her fingerless gloves, she grabbed the artifact, and pulled.

Instantly her body convulsed with vibrations, as power and energy surged through her. Her mind raged as she realised what a bad, what a terribly bad idea this had been and she was going to die holy shit whatnow-

And then, with a huge blast of energy, she shot backwards, sliding down the muddy hill, landing on her butt in the dirt. And the contraption was in her hands.

And Jeena started to grow.

It was slow at first, just a tightening in her feet which she put down to a bad landing. Her pants were pulled taut, but again she’d just fallen ten feet through the air, so that was to be expected. Her chest felt tight too, like it was expanding, but she’d just experienced some kind of electric shock, so again: natural.

But as Jeena lay on her back, breathing deeply, admiring the green throbbing artifact on her stomach, she noticed her chest was starting to rise with each breath…and then not go down. She thought this was just her panicking at first, refusing to breathe out enough, but every time she tried to breathe her lungs completely empty, her breasts rose a little higher on her chest.

She was looking down at her unimpressive cleavage, expecting to see all the way down her body. Not this time. Her breasts seemed to be growing larger with every breath she took. She could see them growing both upwards, but outwards too, getting bigger and wider as the artifact on her stomach throbbed and whirred. What was going?

Jeena tried to get to her feet, but found herself momentarily paralysed. The fall had hurt her back, and besides, this device was suddenly incredibly heavy, weighing on her stomach…and still her breasts grew.

Jeena found herself experiencing a rare kind of thrill as her burgeoning boobs touched for the first time, as they grew wider and wider, her small tits slowly becoming decently-sized, and showing no signs of stopping.

In another scenario, Jeena reasoned she would have even quite enjoyed the sensation of her tits slowly expanding, slowly blowing up larger and larger, but the fact that she couldn’t move and was in somewhere unknown, possibly alien, possibly thousands of years of old was putting a damper on that.

And yet she couldn’t take her eyes of her expanding bust. They were now like small rocks on her chest, big and round and heavy, and jiggled slightly with each breath. Her red vest top was being pulled up beneath their bulk, and she loved the curves she could feel as her breasts slowly spread forwards down towards her stomach where her hands were locked, holding the device.

The bigger her tits grew, the more Jeena felt excitement throb inside her, as she blew up and up, the rocks on her chest expanding bigger and heavier with every breath she took. She watched with a thrill as the device on her chest slowly began to disappear from view, as two large fleshy balloons inflated larger and larger in front of her eyes, pushing together as they ran out of room in her stuffed top.

Soon enough, her cleavage was becoming positively gargantuan, and there was no sign of the artifact lying on her stomach. The only way she knew it was there was because her hands were holding it – her now-massive tits were obscuring everything below them, and were only getting bigger.

Jeena felt her vest top starting to strain now, as her big fat nipples poked up and through the struggling fabric. It really wasn’t built to contain a chest like this, and she didn’t feel like it was going to last much longer. Also her feet were feeling really tight in her boots, like they were going to burst out. Jeena suddenly had a thought: was this growth not just confined to her chest?

She tried to roll to the side to see past her massive breasts, but movement was still difficult, though slightly easier than before. Her huge tits wobbled and groaned as they expanded larger and larger, and Jeena started to enjoy all of this a little less; she now wanted to get out of here before she was too big to move.

As she was thinking this, a sharp pain shot through her feet, as they burst out of her boots. What was going on down there?! Her pants were also feeling really tight, particularly around her butt, which was weird – there’d always been very little junk in that trunk. But now, it was as if she was sporting a huge booty, the way her pants seemed to be buckling around her rear as it bulged into the ground.

Jeena decided it was time to get up. She strained her hands, desperately trying to get them to let go of this artifact they were clutching, and with a great effort, she got them free. The artifact lay there on her stomach – or at least, that’s what it felt like – Jeena still couldn’t see beyond her breasts, especially now that each of her humongous boobs was about the size of her head, and was positively stuffed in next to the other, in a massive pressed-up canyon of cleavage that was threatening to shred her red vest.

Finally, her arms seemed free to move, and Jeena dug her elbows into the soil, lifting her upper body off the ground. She wasn’t sure if she was weakened by the artifact, but getting herself up was hard. Harder than it should have been. Then she looked down and saw the true scale of her tits, and knew that none of her strength had left her; she was just enormous.

Her breasts had ballooned to incredible proportions while she’d been lying down, and sitting upright, and seeing them in contrast with the rest of her body, showed how big they truly were. Sitting upright, she couldn’t see the artifact below her tits, throbbing and humming all the time. She knew it was there, could feel her whole body tingling, but her mammaries were just so colossal, it was as if it was invisible. And she could still feel them swelling and growing.

Jeena looked down at the rest of her body, such that she could see, and noticed her pants were now incredibly skin-tight. Was the rest of her growing too? She looked down to her shredded boots, and knew that must be true. Her feet were massive, but looked in proportion to rest of her, apart from her gigantic jugs. She must be huge now!

Movement began to return to her body, and suddenly her preposterous jugs starting shaking madly. Jeena felt herself hypnotised by the enormous shelf of tit shaking and bouncing into itself, before realising the whole cavern was rocking! This couldn’t be good.

She urged her limbs to move, and as her thighs and ass began to tear her tightening pants, she managed to get to her feet. She looked around at her body (not down the front side – her breasts were way too large for that) and looked at how much she’d grown. Her pants were riding way up her large legs, inches of ankle sticking out the bottom. She must be close to 6ft now, and still growing.

Tearing her gaze away from her expanding figure, Jeena felt droplets of water hit her with increasing frequency, and saw streams of water start to trickle out of the holes in the cavern walls above. Firstly: fresh water! And secondly: ohshitshitshit.

Jeenna grabbed the item, and felt the tingling re-emanate around her body, as she clambered up the mud slope to the exit.

Her massive fat udders swung down, almost brushing against the dirt as she made her way higher, her butt, legs and tits expanding the whole time. With nowhere to store the artifact, Jeena shoved it between her colossal breasts, knowing this was either a really good, or a really bad idea, and used her now-free hand to ascend the slope with more speed.

She could already feel the artifact being squished as her boobs expanded more rapidly, creating an enormous bulging mass of cleavage around it as they swelled larger and larger. She somehow loved the sensation of them growing as she scrambled up the slope, and couldn’t believe how large they were already.

As she made it to the top of the hill, Jeena turned back briefly to survey the cavern one last time, her fat tits swinging with the momentum of the turn, further stretching her struggling vest.

Water was now pouring at some speed from many of the holes in the cavern walls, and was quickly filling up the moat around the central pillar. Definitely time to leave.

Ducking into the passageway up to the entrance (she was now slightly too tall for it), Jeena felt the expansion deepen as she sprinted up the path to the exit. Her breasts were now so huge, their weight was almost dragging her to the floor, and with every pump of her elongating legs, she felt the fat mass of her tits jiggle and slosh crazily in front of her. Her vest stop straps were starting to go, as the huge weight of the twin bowling balls on her chest tugged down on them with every step.

The crazy bouncing of her boobs was only matched by the size of her booty, which was jiggling and expanding as she ran up the passageway to the exit. Her ass was getting really big now, and so wide! She felt it briefly as she ran, and was amazed at it tightness and girth. She had no idea how she was going to remain a scout after this.

The entrance lay ahead, and Jeena ducked further as she grew taller and taller – way too high for the height of the tunnel. Her breasts started to take up more and more of her vision as they boiled over the top of her vest and started to bulge towards her chin. Her clothing in general was going to last much longer against the vicious expansion that was taking place.

Nearer and nearer she got, massive shocks shaking the cavern, causing two large rocks to fall by the exit. The gap was getting increasingly narrow, and she was getting increasingly wide.

Squeezing her fat ass between the rocks, Jeena lifted her boobs over a particularly tight section, feeling the warm air on her right hand side, and the cold water on her left. The liquid started to splash over her gargantuan breasts, causing the mass of exposed skin to form gooseflesh, as her massive nipples shot forwards with the change in temperature.

So close now, Jeena squeezed her still growing form closer and closer to the outside, as her breasts completely smashed up against the tight exit. There was almost no room for her to move, as her body, butt and boobs blew up bigger and bigger. And then, finally, she was stuck.

Jeena wriggled and squeezed, desperately trying to move as her form expanded larger and larger. But that was it. She was now too big for the gap. Her boobs ballooned bigger and bigger, and now each tit was over twice the size of her head. Her top was in tatters as it tried to hold in something that was just too bulging and large.

And still the water pressure built up and up on her left hand side, as more and more of it piled up against her, like it was some kind of fire hose with the nozzle pinched. She loved the increase of pressure, it felt like what was going on inside her. The larger she got, the hornier she became, and Jeena felt like she was going to pop.

As the straps of her top started to unravel and her pants split open at the constant expansion of her butt and thighs, Jeena felt the water pressure reach critical levels, and all of a sudden she was fired out like a cannon into the arid desert, fresh water spilling all around her.

Lying on her back, she felt the incredible weight of the two gargantuan masses of flesh strapped to her chest, and decided she’d better drink an awful lot of water; whilst her new, much taller form would be able to walk a lot faster, she was going to have to lug a lot of new tit back to town to tell everyone about all this water. Her chest was so heavy. She started to grow even hornier.

So first, she decided to finger-fuck herself, as a treat.

She slipped a hand into her shredded pants, feeling her incredibly wet cunt gaping for her huge new fingers.

She’d earned this.

—

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