Mary didn’t dream anymore that night.

She slept soundly until she awoke to the feeling of labored breathing and pain on her chest. She frowned, and rolled over to the side, her gigantic breasts thumping into the bed with a loud smack. They almost poured off the edge of the bed, threatening to drag her to the floor, but luckily Mary woke up, pulling herself from the edge back towards the center of the bed. She had to be more careful – ever since she got these gigantic implants all those years ago, she knew that she was so top-heavy she could tumble out at the slightest provocation. Being this busty had its drawbacks, though they paled in comparison to the benefits.

She shuffled back towards the center of the bed, the tee she’d worn to sleep in barely covering her belly button. It was one of Rob’s old sports ones, and was big on him. It was huge on her, except for the fact that her breasts erupted like the massive balloons they were, taking up so much space that even this massive tee managed to be quite tight on her. She lay back on the pillow, her tits erupting towards the ceiling. It was hard to lie on her back, she had to keep reminding herself of this. There was so much silicone in her breasts, the weight made it hard to breathe. She leaned onto her side, her breasts taking up all the space between her and Rob, her huge nipples brushing against him, her massive, wobbling mounds so huge and expansive.

“Morning babe.” Came the sleepy response from Rob, who rolled over to get a face full of boob. “You think I’d be used to these things by now.” He grinned, pulling away to look at Mary’s face, which looked so small compared to the twin globes that rose and fell just below it. “My big booby busty beauty.”

Something about the alliteration of all those “b” words sent joy through Mary’s increasingly simple mind, and she giggled. “I’m your big booby busty beauty!” She parroted, giggling and getting on top of Rob, her huge tits almost obscuring his face as she looked down. She arched her back, making her breasts look even more enormous than they were, and Rob’s cock pulsed against her cunt, just like she knew it would. That always got him going, no matter what time of day it was.

“I’m going to fuck you so hard.” He grunted, tearing off his clothes. Mary struggled to remove her tee, her gigantic tits proving quite the challenging obstacles to overcome. Eventually, after much giggling and getting stuck, her phenomenal tits were loosed, and she began to ride Rob’s cock, her massive fat boobies slapping against her chest, threatening to pull her down to the bed, they were so huge and heavy. Before long, they were both coming incredibly hard, lust filling both their brains.

**

“So, where do you want to go today?” Rob asked, pulling on a skin-tight tee. Mary played with her long, blonde hair, and looked at him, confusion in her fuzzy mind. Rob had always been slim and svelte, but now he was so tall and buff it rattled her brain. She was going to go to the shower to clean the cum out of her, but instead the marvelled at how muscular Rob’s arms were. Her brain fuzzed and fizzed, trying to process what was going on. But it was running on a lower capacity than ever, and before long, Mary knew Rob had always looked like that. Maybe at one point he hadn’t been muscular, but not when Mary knew him. He’d always been her tall, buff man. She wouldn’t have him any other way.

She moved up to him, as close as she could get with such enormous fake tits taking up the real estate directly in front of her. She pushed her titties into him, and they bulged upwards in an insane mass of cleavage. Rob looked down with undisguised lust in his eyes.

“Can we go see the horsies?” Mary asked, her hands running up Rob’s bulging arms, which looked incredible in his slim fit tee. Her husband was so buff, and Mary loved it.

“Uh, sure. I’m not sure they have horses here, but there’s a farm nearby we can check out.”

“Thank you.” Mary purred, squeezing Rob’s arms, and swiftly removing his large dick and sliding it into her mouth.

**

Once they were cleaned up and had found some clothes for Mary to fit into – this being no mean feat, they ended up getting one of Rob’s largest tees, and tying it under Mary’s gigantic breasts, having it double up a kind of t-shirt / bra combo – they wobbled their way to the farm. Mary’s tits were so huge that even in this very busty place, she turned heads. Everyone stared at her massive rack, and it made Rob even more horny for her. He pulled her close, loving the huge, fake tits that pressed into his side. No matter where she was, there was the chance her breasts could get in the way – and Rob loved that. He loved how massive his wife was, and how she was all his. Mary, for her part, loved feeling she was the center of her husband’s world, that he had eyes only for her. She had dim memories of feeling inadequate, in some other life, many moons ago, but with her gigantic fake tits being the biggest around, there was no way he’d ever look at anyone else. And that thought made her very happy.

When they made it to the farm, it turned out there weren’t any horses. Rob doubted someone with breasts as large as Mary’s would have had a very good time riding them anyway – her chest really looked like it would have been an impediment at this stage.

Instead, it was a milk farm, with a bunch of cows lined up in stalls, providing fresh milk for the island. It wasn’t what either of them were expecting, but it was fun enough for a little trip, and they walked around the place, examining the cows, giving them a pet, looking at the machinery they used.

And then Mary saw the milking device, the large metal suckers used for clamping on the cow’s udders and expressing the milk from them. And when she saw that, everything changed. Her mind, so full of fuzz and lust and desire to be huge, saw the milking device, and knew that it was what she wanted. Synapses fired, neural connections were made, and she looked at Rob with eyes of fire. The fuzz was still there, clouding her thoughts and making her simple, but through her simplicity came a razor sharp focus that told her what she wanted and needed right now.

“I don’t want anyone to be able to use this if I can’t.” She said, angrily, holding the pump up to one of her massive, fake, bloated tits. “Can you imagine, some cow being milked, and not me. I’m the biggest cow there is!”

There was no one around, and Rob raised an eyebrow.

“Is that what you want? To be a huge a cow who gets milked?” He stepped closer, his muscles bulging in his tight tee. He was so tall and powerful.

“I want to be your cow, and to be milked. Because my big, fat titties are the hugest udders in the world, and like, the only way to stop me exploding is to get out all the milk I produce. Because you’re my bull and you’ve fucked me and now I’m going to pop.”

Rob had no idea where this was coming from, but he couldn’t deny he liked it. He envisioned Mary with gigantic, milky udders, her breasts impossibly large, bulging out in all directions, so huge she could barely move, and his cock grew rock hard. Mary, at the same time, was imagining herself with similarly giant, milky breasts, and the thought sent bolts of arousal through her brain.

“How big would you want me?” She smiled, moving towards him, pump in one hand. Her massive, fake tits, stuffed into the shirt tied at the waist, even bigger than her head, wobbled a little, so huge and swollen.

“You couldn’t handle how big I want you.”

“Pfft. You have no idea what I can and can’t handle. I’ve managed tits like these.” Mary scoffed, hefted her giant tits with both hands, something that was difficult, they were so large and heavy. When she let go they almost pulled her forwards into Rob’s arms.

He laughed at her top-heavy antics.

“I want you to have the biggest breasts in the world. So big you can’t move. And I’m just going to fuck you with my big bull cock because you’ll be my cow, and your udders will make so much milk.”

“Mmmm, tell me more, my big bull.” Mary grinned, reaching out and grabbing Rob’s impressive cock. “I like the sound of this.”

And as they toyed with each other, egging each other’s fantasies on, Mary felt the fuzz in her brain, more powerful than ever, and the tension in her body, and she began to balloon larger once more. This was the first time she’d been so clearly aware of it, but her brain was so fuzzy it was hard to put words to it. It was like this was what was always supposed to happen. All was right in the world.

“I think it’s happening, babe. I’m getting bigger and milkier for you.”

Rob’s eyes widened, but only a little. Part of him knew that this was going to happen, too. But that didn’t mean he wasn’t going to enjoy it. He sat down with Mary, their legs entwined, as her boobs began to grow. It was hard to tell, initially, because her tits were already so big, any expansion was less obvious than it had been when she’d been but a meagre B-cup. But with her massive, cannon ball-sized breasts strapped to her chest, it was more difficult to observe the expansion. But Rob placed his hands on her colossal tits, and then knew they were growing. He could feel them moving outwards, with each breath Mary took, and could see the t-shirt tightening around their preposterous mounds, as they grew bigger and bigger.

They were getting heavier, too. Mary could feel the contents of her tits being filled up, just like when she’d had all that silicone installed, except this time it was milk that was being pumped inside her. Her breasts were engorging, spreading outwards in all directions, but mostly they felt like they were thickening, getting more dense as well as getting so much bigger. They were already so heavy, but now it felt like she was carrying a wheelbarrow of boob in front of her as her tits expanded. They were getting so huge and milky, droplets were now starting to drip out the end of her tits, soaking into her t-shirt, her massive, watermelon breasts so immensely huge and full it took all her strength to hold them up. She sat on the floor opposite Rob and mooed gently, her breasts spreading outwards all the while.

“Moooohhh it feels so good babe.” She groaned, patting the tense, thick sides of her massive udders, feeling the solid, stuffed contents barely moving as she touched it. She was so full, it felt like she was going to explode.

“How big shall I get?” She whispered, as her breasts grew larger. They were now approaching twice the size of her head, and were so big the massive tee was starting to come undone where she’d tied it under her gigantic bust. It honestly looked like she taken two beach balls and shoved them under her shirt, but both of them knew these babies were real, and were the hugest, sexiest tits there were.

“I feel like I’m going to burst.” Mary moaned, her breasts stretching larger. They were now pressing into Rob, even though he was sitting quite a way from her. Mary’s chest was now so enormous, it was hard to be anywhere near her and not be touching her tits. Rob loved it. He loved how huge his wife was.

“We should get you home, before you leak milk all over the place.” Rob grinned, hauling Mary to her feet with considerable difficulty, eventually getting her to totter upright. She almost overbalanced, her massive milkers almost dragging her back down to the ground. They now took up most of her top half, and her massive shirt was barely holding them in place, she was so insanely busty.

“I’m going to explode.” She whispered in Rob’s ear, only intensifying his boner as he imagined how huge his wife’s tits were going to get.

“You and me both.” He grinned, guiding his pair of breasts on legs towards the hotel, where she tottered with shaking legs towards their room.

**

The sex was incredible. Rob laid Mary down, after he managed to squeeze her into the elevator and get her into the room, her breasts now so huge and full she could barely move. The bed almost smashed to pieces as she fell onto it, her t-shirt now a mockery of its former self, it was so stretched and battered.

When Rob got her down onto the bed, he pulled it over her stupidly large breasts, and almost came there and then when he looked at them. They now took up almost all of Mary’s torso, and were so towering and stuffed with milk they resembled actual beach balls. They were primed and ready to explode, so Rob went to town on them, milking and fucking them as Mary cried with pleasure. Soon everything was a creamy, milky mess. Cleaning this room was going to be nightmare; neither of them envied the staff who were going to have to sort that out.

And, after insanely good sex, Mary’s breasts having deflated a small amount from the milking, they both fell asleep.

And they both dreamed. And these dreams had almost identical content, so much so that the two people creating them appeared to be in perfect mental synchronization. And this had the effect that their dreams combined, their twin desires flooding into one another, strengthening the other, so that when Mary dreamed of having enormous milky breasts and being a big huge cow with huge udders, and when Rob dreamed of being a massive dominant bull with an enormous dick for fucking his cow, they both awoke in the night feeling too horny to speak. It was like their minds had been wirelessly connected, and they knew what each other wanted.

“Get on your front.” Rob ordered, his muscles rippling, his cock bulging out in his struggling underwear. He was growing an absolute monster down there, a huge cock to put any bull to shame. His balls were swelling to the size of tennis balls, and the virility inside him was pulsing through his every nerve. He breathed through his nostrils, so deeply turned on if he didn’t come very soon he was going to destroy this whole room.

Luckily, what he wanted was his enormous-breasted cow wife in front of him – that was what he wanted more than anything in the world, so when she got on all fours, her gigantic udders swinging down, almost pressing into the bed, which was groaning under her huge weight, his cock burst from his underwear, spreading outwards, almost a foot long, dripping with pre-cum.

Rob moved to his wife’s neck, and took a deep, long sniff, tasting her scent, loving her deep and profound arousal as his huge, wobbling cow, ready to take his seed. She had the most enormous udders he’d ever seen, but he knew that she was going to get bigger, and that was what he wanted. She had so much milk to express.

“Fuck me.” She whispered, her voice quivering with anticipation. “Fuck me with your giant bull cock. Mooooo.”

The last sound was almost whispered, but it was that that sent Rob into overdrive, his giant cock throbbing and growing, so massive and thick he wasn’t sure it was going to fit inside his giant wife.

Luckily she was so turned on it slid into her aching, wet cunt, and before long Rob was pounding his gigantic-breasted wife, who mooed with pleasure, gripping the bed as best she could, trying to stay on all fours while her husband’s massive cock pumped inside her.

It was like he was filling her up with milk, because every stroke of his colossal dick caused her already gargantuan breasts to swell larger, to fill up with more milk. She was becoming his perfect cow, and as he fucked her with his enormous dick, her breasts ballooned larger and larger. They were already so huge and heavy, it was almost scary for Mary that they were getting bigger. Yet it was also exactly what she wanted, and before long they got so huge they began to bulge into the bed, which took the weight off Mary. Now that she no longer had to support her breasts, because they were resting on the ground like twin bean bags, she ground her cunt against Rob’s thick cock, feeling every inch of it inside her, loving the immense sensations of pleasure as her husband fucked her to within an inch of her life, her breasts ballooning bigger all the time.

Before long, she was being lifted up in the air, her tits were so huge. They were now around 50% of her body, her massive fun bags so colossal they were spreading out across the whole bed. The bed was straining under their weight, and both Rob and Mary knew it was going to break before too long. Sure enough, after Mary swelled another few inches, her breasts now wider than she was, and so huge and heavy, the bed legs shattered, and both of them tumbled to the floor.

Luckily Rob was hugely powerful and muscular by this point, and so held her with both hands, essentially spit-roasting her body, with him holding one half, and her breasts, now the size of large medicine balls, holding up her other half.

They were both going to come soon, it was impossible to avoid that fact. Mary was so full of milk she weighed about three times as much as before, and Rob was such a huge, powerful bull he was going to destroy something if he didn’t come soon.

They were both grunting and shouting and moaning and groaning, and Mary was rubbing the sides of her globe-sized breasts, trying to get them to express, concerned that if they got much bigger she was literally going to burst. They were so full, and while at the moment they were happy to expand, she felt on some level that there were limits. And while she didn’t know what those were, she felt sure she was close to them.

“Oh fuck, I’m going to…AAAAAAAHHHHH!!” Rob cried, with the intense power of an animal, and began to blast hot, thick cum into Mary’s waiting cunt. At the same time, her breasts, which were now so large they had lifted her a meter into the sky, began to fire huge bolts of milk from her huge, erect nipples.

Cum and milk was firing everywhere, the room becoming pasted with hot, thick, white substances, and both Mary and Rob were experiencing orgasms the like of which they’d never known. Their animal bodies were on fire, sensations coursing through their veins like nothing on this world.

After a long, protracted climax, finally they were both done. Mary fell immediately asleep, as did Rob, still inside her. Neither of them dreamed.

**

The next morning, it was time to go home. Both of them knew that their lives would never be the same again, and that this trip had awoken many things inside both of them.

Mary’s breasts, when she awoke, were still the biggest pair of tits in the world, far larger than when she’d had implants, but were now natural again, and positively stuffed with milk. But with judicious milking (and some more fucking from Rob), she reduced them to the size where she could just about manage to walk. They barely fit through doorways, but if she moved one boob at a time, she could just about manage it. They couldn’t both get in the elevator, because Mary almost broke the weight limit on her own, but somehow they made it to the reception, where the busty woman they’d met upon arrival – that felt so long ago! – asked if they’d enjoyed their stay.

Rob and Mary looked at each other – both so changed in the short few days they’d stayed in this wonderful, magical place – and smiled widely.

“We certainly did.” They smiled, responding together, in perfect synchronicity.

“I’m so glad to hear it. You’re both certainly looking…more.” The receptionist smiled, noting with a nod of her head Mary’s breasts, which were covered by the bikini she’d worn on the second day. They’d had to add a couple of feet to the length so that they could tie it around her insane breasts, but she was leaking so much milk, plus no other clothes would even remotely fit her preposterous bust, that this was their best bet. Plus it was a holiday! You had to wear your swimming gear on holiday.

Both of them waddled to the door, Mary because her tits were so huge that movement was, whilst not impossible, a huge challenge, and Rob because his cock had gotten so large that it made walking genuinely difficult for him too.

They hailed a taxi, and Mary managed to just about squeeze her tits inside. They were so large, they burgeoned up to the seat in front, with no room between her and the seat. All she could see was cleavage. She tried not to leak milk into the cab, but it was hard to resist. She was filling all the time, and the hornier she got – and her figure made her feel constantly horny – the quicker she filled. It was quite a conundrum, but a very sexy one.

They made it to the airport, and after some comical experiences with airport security, with a lot of stares (Mary was big, even for some of the patrons at this hotel) and a lot of squeezing through tight security equipment, they made it on the plane. It was time to go home.

“Wow, what a trip.” Mary smiled, the fuzziness in her head greater than ever. Her giant tits were all she cared about, and having Rob’s entire focus on her monstrous rack the whole time gave her a thrill the likes of which she’d never known.

“You said it babe”, Rob smiled, wrapping his arm around her as they sat on the plane, ready to take off. They’d had to move to a front row, because Mary’s tits were simply too big to fit anywhere else. The flight attendants had raised an eyebrow, but the flight was pretty quiet, so no one really minded.

“So, like, when we get home, then what?” Mary asked, looking at Rob hopefully, her stupendous breasts rising up and down with each breath. She was so huge and beautiful, Rob scarcely knew what to do with himself.

“Well…as my cow, you’re going to have to make me lots of milk. And I think you’ve got quite a bit of growing to do.” He smiled, poking one of her insanely huge breasts, causing a little squirt of milk to pop out of the end of one of her monstrous teats.

“Hey, quit it!” Mary laughed, her tits shaking so hard she almost bounced into the person next to her.

“But yes, I think that can, like, be arranged.” She smiled, taking some gum and putting it in her mouth, as the plane flew off into the sky.

She knew what she had to do. They were done with vacation now, it was time to get back to the real world, time to get serious.

Time to get truly huge.