Right, I’ve got to tell you this story.

I’m Pete, mid-20s, fairly average guy; pretty funny, like a good wisecrack, but otherwise fairly unremarkable. I’ve been single for quite some time, and not necessarily out of choice, but things have been going my way recently, and I started seeing Diane.

She’s great. Bit older than me, tall, blonde, slim, smart, great smile, caring – all that good stuff. Not that you asked, but sex is incredible. So I’m pleased as punch, as you might imagine.

However, there’s one…other thing. And “other” ‘s the only word I got for it. Ok, I don’t know how to say this, so I’ll just come right out with it. When she gets scared – and I don’t know if this is some weird genetic throwback to self-defense – her tits get bigger. I know. I know. It’s really, really weird, and the first time it happened, I didn’t know what the hell was going on.

We were driving on the way to my folks place, and some prick was driving like a maniac – he almost hit us a couple of times. Now Diane was driving at the time, and this guy was creeping her the hell out, so she was kinda hyperventilating, trying to regain her composure; it was a pretty hairy ordeal. And every time she breathed in deeply, her chest would inflate – obviously – but then when she breathed out, it would stay the same size. And this continued for quite a long time; essentially she was blowing up like a balloon, and her summer dress was riding further and further up her body as her tits swelled up and up, until they were like big pert melons resting on her chest.

So all of a sudden, my perfect girlfriend is this large-breasted bombshell, and I don’t know what to make of it – and of course she’s trying to think of a way to break this mental condition to me, which is panicking her even more and blowing her tits up bigger and bigger and bigger until I think she’s going to explode – her seatbelt is cutting across her massive jugs, creating even bigger cleavage, and I suddenly realise I’m the most turned on I’ve ever been in my life and so is she – the come down after the fear is this massive endorphine rush, and we both becoming desperate to fuck each other’s brains out, except now I have these two enormous tits to bring into the mix and I’ll be honest – I couldn’t be happier. What a development, eh?

Which brings me to the story I want to tell you. So it was Diane’s birthday last week, and I wanted to do something cool to commemorate it, something using those powers of hers that we both loved.

She’d explained it all to me, after that incredible evening in the car the first time I saw her expand. It just started happening at the tail end of puberty. Whenever she got scared, they started to grow.

She could often keep it under control, and she’d gotten better at it as she got older, but sometimes – like in the car, with the pressure of seeing my parents (which is never the most relaxing of experiences) with me finding out for the first time about her ‘condition’…well, it was the biggest I’d ever seen her get. I reckon her tits were about a H-cup but, that’s not that helpful. I honestly wish I’d brought a measuring tape; they must have been about eight inches straight out, and as someone I was used to having practically no breasts, that looked bigger than I ever thought possible. That poor dress barely made it.

But I digress: Diane’s birthday, using her powers, etc. Now, it had by necessity to be a surprise, because you can’t really be scared unless you don’t know it’s coming. I guess I could have still made her jump, but that’s cheap, and only produces an inch or so of bust.

I want to clarify before I go on, that Diane was totally onboard with this; I’m not some creep. She loved being scared in controlled environments, she loved having huge tits, and she loved fucking with them while they were still massive. They tended to remain for a good few hours, slowly deflating back to their original size, so once they’d grown, it was the perfect time to have some fun.

So I thought: scary movie, right? Not Scary Movie; that was shit, but a scary movie. Diane loved scary movies, and we’d been through many an item of clothing enjoying them. My friend Simon works for the local independent cinema, so I had a word with him about getting a screening room all to ourselves – just a small one – and going for a horror movie marathon: Texas Chainsaw Massacre (original), Dawn Of The Dead (Diane is really scared of zombies), finishing with Ringu (just plain fucking terrifying).

So the date was set, and all the preparations were in place. I didn’t want to tell Diane to wear a really loose top, as that would give the game away, but she turned up in little denim hotpants and a pretty loose white t-shirt, and I loved her a little bit more for that. Not a word was spoken about what we were going to be getting up to; she was up for being surprised. It was perfect.

We went out for a great meal first, chatting about all sorts, Diane jokingly trying to find out what the plans were later, but happy to go with the flow. A real great evening.

Then we got to the cinema. Simon had worked his magic, and the lobby was completely deserted. It was a Thursday night, so not crazy busy anyway, but he’d managed to secure it so we had the place to ourselves, if only for a little while.

Hand in hand, we picked up our tickets from Simon, who played the part of creepy usher with aplomb, and walked into the empty cinema. Simon had done things up a treat – making the place look just the right side of unsettling – candles burning in the low light, ‘spider webs’ around the place (that string stuff everyone uses during the holidays), some incense going – there was even a coffin in the corner. Nailed it, buddy. We sat down, popcorn and drinks in hand, and prepared for big scares.

Chainsaw Massacre first. It built up slowly, but dread does very interesting things to Diane – creeping horror works on her nipples first, which started to push out against her white top, through her bra, as her boobs slowly started to grow bigger. Before we even saw anything terrifying, she was gripping my arm, and adjusting her bra strap, as her tits were beginning to bulge outwards with all the pent up fear. Perfect.

Then when that dude in the wheelchair is cleaved in half, she screamed out loud, and lay back, gripping the arms in pure fright. This is where the growth really started to take place. Her tits began to press outwards, straining against her tight bra, as her nipples engorged and poked right up. I looked over, and kissed on the cheek, noting the rise of her chest continue to swell unabated, lifting the loose t-shirt up and up and her tits rose, growing bigger and bigger.

I was pretty torn here. We were both getting really turned on by how big Diane was getting – her tits were about six inches straight out now; large orbs sticking right out of her thin frame – but equally, we both wanted her to get bigger, which meant keeping the tension and the atmosphere. Luckily, I had a plan.

We started making out, as is cinema etiquette, pulling each other’s hair, getting very passionate. I reached down to grab one of Diane’s tits, and they were even bigger than I’d thought. The loose t-shirt covered up their true size, but they were so big already, I could barely get my hand completely around one of them. God this turned me on like you wouldn’t believe, and we kissed hard, me reaching down one hand to Diane’s cunt, her reaching down for my dick. It was on.

Suddenly, Simon burst through the door, in full Leatherface get up, gunning a chainsaw, and howling. FUCK! I’d told him to surprise us (I didn’t want to know how, afraid I’d give the game away), but he’d excelled himself. Diane took one look at him, and screamed outright – talk about your 3D experiences. Sitting back in the chair, she started to laugh at Simon ran screaming out of the room, and her fear turned to arousal, as her tits renewed their swelling, inching bigger and bigger, now becoming really obviously big, pushing her loose t-shirt out and out and bulging ever larger. I reckoned they were about eight inches straight out, now. I was ridiculously turned on, but was trying to control myself. We still had a long way to go, and much more growth to experience.

The marathon continued, and I tried to get the balance right between making out, and keeping us both involved in the movies – it’d be worth it at the end to have Diane as huge as she could possibly be. This had always been a problem in the past. We’d set up a scenario to make her massive, get really turned on halfway through, fuck, and then go to sleep. Not this time.

“Pete,” she whispered in my ear. “I want to get really big. The biggest I’ve ever been.”

Couldn’t’ve put it better myself.

Dawn Of The Dead did its job – Diane is really not big on zombies, though her tits were – and the growth continued pretty unabated throughout, taking her up to a pretty huge twelve inches of bust, jutting straight out of her slim frame. Her t-shirt was pulled in beneath the edge of her huge curves, which were incredibly pert and firm, and was riding up higher and higher, trying desperately to contain her immense tits, and huge, hard nipples. Her bra had been destroyed a long, long time ago. God I was getting turned on like you wouldn’t believe.

I was desperately trying to keep my hands off her still swelling tits, trying to keep things in the room, despite the enormous balloons that were blowing up and up on my girlfriend’s chest. Christ it was distracting, and I knew we were both crazy turned on. Each scare was like someone had pressed a pump down, and made her bigger and bigger. And bigger.

Ringu was a great last choice, if I do say so myself. You naturally get acclimatised to scares the longer you watch, but the distinctly ‘other’ vibe of J-horror provided a fresh sense of unease, which pumped up Diane’s bust even more. As the film continued, I could hear her t-shirt began to rip, as her bust swelled larger and larger. I tried not to look, but I spent most of the film watching her bulging tits grow bigger and bigger, stretching the now-pitiful-looking t-shirt, which seemed as if it was trying to smuggle two cantaloupes. They were so luscious and large and firm, and I just wanted to suck on them and put my dick between them, but I resisted, instead content to watch them grow bigger, and bigger and bigger with each passing scare.

I you haven’t seen the end of Ringu, I won’t spoil it, but it’s fucking mindblowing. I’d seen it before, and it still shit me right up. Diane had no such luck, and was physically recoiling, bringing her knees up to her chin. Unfortunately, this was no longer possible, as she had two huge, fleshy pillows taking up sixteen inches of space in front of her chest, so instead she hugged her massive mammaries, which she could just about get her arms all the way around, and bit her lip. By the end of the film, her arms were pushed almost completely apart, as her chest swelled to titanic proportions.

I leaned over to make out, as the credits rolled, feeling one humongous breast with my hand. It was so heavy. I couldn’t wait to fuck her. We kissed hard and passionately, as Diane swelled bigger and bigger, practically pushing me away with her tremendous tits, which wouldn’t stop growing.

“Sorry Pete,” she smiled, her cartoonishly huge tits only just contained by her shirt, which had seen better days, “I’m still a bit creeped out. Can we head home? I definitely won’t get any smaller.”

“Great idea, babe.” I responded. I got out of my chair, and Diane tried to get out of hers. Her seventeen inch chest was just too massive though, and I grabbed her arms and hoisted her up, pressing her incredible bust into me. They were so luscious; I was being driven insane!

Taking Diane’s arm, I could feel her huge right breast bouncing against me as we walked. It was so wide! We left the cinema, and I produced an enormous overcoat which Diane slipped on. It was XXXXL, and still had very little chance covering up her ballooning breasts, but it at least just about draped over them.

We wobbled out of the cinema, though the quiet lobby, and I waved goodbye to Simon. We were parked right outside, so we jumped in.

And this is where it all went wrong.

I was in the driver’s seat, Diane just about squeezed in the passengers. She moved the chair back to fit her massive tits in, which had just about settled their growth.

“I had such a great night, Pete.” She said, smiling happily.

“Me too, babe.” I replied. And I had. It was amazing.

Suddenly, I heard a tap on the window. It was some middle aged guy with a beanie on, who smiled to reveal two rows of crooked teeth. He did the ‘down window’ motion.

I shrugged, and started rolling the window down.

You have to understand I was too horny to think straight, here.

“Pete, don’t!”

It was too late. A hand shot inside the car, and grabbed me round the neck. I was choking. Now then. I couldn’t see much of what happened next, as I was a little incapacitated, but here’s how Diane tells it.

While I was writhing, hitting this dickhead’s arm, trying to get him to let go, Diane started screaming. She’d had her fair share of horror that night – we both had – and this was the last straw. Her breasts bulging and swelling bigger and bigger, she struggled her massive bulk out of the car (which was a real tight squeeze), and tottered around to where this thief was, with his arm round my neck. I couldn’t see from where I was, but I saw them later, and she was massive. Already the biggest I’d ever seen her before this happened, so you can imagine how big they were now.

“Get! Away! From! My! Boyfriend!” Diane yelled, leaning into this guy with her tremendous bust. She was hitting him with her fists, but that’s not what did it. The thief probably couldn’t see, due to the overcoat, but essentially Diane was using her fear, and growing into him, crushing him against the car with her swelling bust, which was growing bigger by the second, inching more and more into this guy’s body, pressing him closer and closer into the car. From inside, I could hear the axles groan, and the window begin to crack, as more and more pressure was being put on them.

Diane just grew and grew – sixteen, seventeen, eighteen, nineteen inches of breast, straight out, pinning this poor sap against the door of the care. It was his turn to be scared.

“What the fuck is this?” he cried, as his chest was pushed further in by a huge growing tit.

“Get the hell away from us, and I won’t crush you”, said Diane, growing bigger and bigger with every passing second.

“Fine. Fine! Fuckin’ freaks!”

And he was gone.

Suddenly, I could breathe again, and I massaged my throat, breathing deeply, so grateful for oxygen. Then I heard a enormous thump, like an elephant had fallen to the ground.

**

Eventually I managed to heft Diane into the backseat, her two huge mammaries sticking upright like two mountains, almost obscuring my view out of the back mirror. She’d passed out from all the fear. Just as well. I’m not sure she could get much bigger and still be mobile. They looked to be at least twenty inches, straight up, wobbling and huge and glorious.

I drove home as quickly as I could, and by the time we’d gotten there, Diane blinked awake.

“Did I…did we?”

“Yeah babe. You did great.”

“My god,” she said blearily, poking one impossibly large breast. “I’m so huge.”

“You sure are.”

“Can you carry me upstairs?”

“I’ll try.”

I hefted my gorgeous, swollen goddess of a girlfriend up the stairs to our bedroom, pressing her tits together to fit them through every door frame. Her shirt covered the topswell of each tit, just about closing over the nipple, leaving the massive undercurve completely free to the elements. It looked like children’s wear on her incredibly over-inflated body.

“Get me on the bed.”

I hefted her down, and there was a great creak as this beautiful girl with her twenty-inch high bust lay back, spreading her hugeness across it. Luckily it held.

“Now I want my birthday present.”

“But you’ve already-”

“Fuck me, Pete.”

“Really? After all that?”

“I may never be this big again. I’m so sensitive and swollen, and I want your dick in me right now.”

“But are you-”

“Pete.”

“Yep. Got it.”

I was obviously beyond glad for the chance to have sex with this incredibly huge amazon of a girl, but I really didn’t think I was going to get the chance. I ripped off my clothes, and took her hot pants and underwear off for her – there was no way she could see or reach anything past her chin – her tits were all encompassing, and she couldn’t stop admiring them, stroking them and licking them.

I slowly slid my cock between her incredibly wet legs, and into her tight cunt. Clambering on top of her tits, I eased down between them, with both hands up on both nipples as I began to thrust. Both of knew this wasn’t going to take long. We were disgracefully horny.

As I thrusted, more and more, Diane begged me to suck on her nipples, which I could just about do whilst staying inside her. This sent her screaming in ecstasy, and sent me into overdrive, and between all the fucking and sucking, we both came ridiculously hard in a matter of minutes.

I lay there for a moment, still inside her, nestled between her mammoth breasts, a stupid smile on my face. Diane had the same on hers.

“Happy birthday, babe.”

I’m fucking great at quips.

So what did you think? Cool story, right? Yeah, me too. You want your own, you’re best off getting in touch with that trilon15atgmaildotcom. That’s what I’d do.

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