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Jim still in the safety of Jeanette's cleavage continued to thrust unaware that Sara, Anna , and even Jeanette herself were getting smothered by her ballooning tits. The sound of creaking wood groaning filled the air. It wasn’t long before the gyprock walls caved under the pressure of Jeanette's billowing bust line.

Sara moaned as her tits squished into the wall. She had one arm wrapped around Jeanette's thickening nipple. She could hear the groaning of Anna not far from her. Sara closed her eyes and prayed for a miracle. To her surprise, a thunderous bang that filled her ears. Suddenly she felt weightless.

The floor had given way and they were in free fall. It only lasted a few moments as they all fell towards the living room below. Jeanette hit first the impact knocking the wind out of her. Stars flooded her vision. 

Jim landed next his swollen cock slamming its way back into Jeanett's still wet pussy. Sara opened her eyes just in time to see herself land on Jeanette's plump nipple. Jeanette’s massive nipple penetrated deep into Sara's pussy. She and Sara moaned in ecstasy. Jeanette's nipple forced its way deeper into her pussy as it swelled bigger. 

Sara hearing Anna moaning loudly looking over. She could see that Jim's mother had also landed on her daughter's other nipple. Sara was amazed at the insatiability of Anna. She was already bouncing up and down on Jeanette's nipple as it continued to swell inside of her.

Jim shook the clouds from his head he placed his hands on his step sister's hips. He pulled the length of his dick out and thrust it back in. Jeanette screamed in pleasure and her tits pulsed bigger. Jim pulled out and thrust again her tits ballooned again. 

With every thrust, Jeanette's tits surged bigger and bigger and bigger. "Ooooohhhh Fuck me harder Jim" Jeanette moaned "I want my big fat boobies to grow and grow and grow." Jeanette could feel something bouncing up and down on her right tit. She looked to the right and could see in a mirror her mother was fucking herself on Jeanette's nipple. "oh yes mom fuck my nipple it feels so good, keep bouncing on it you horny slut."

Sara moaned in pleasure as she felt Jeanette's nipple swell inside her again. It was happening more frequently now Jim was picking up the pace down below. There was a growing bump in her belly now, her body was stretching to accommodate the swelling nipple as it penetrated deeper and deeper into her. Her womb stretched to make space for Jeanette's nipple. 

Sara loved the feeling of Jeanette's nipple growing inside her. Stretching her pussy and womb out. She watched as the bulge in her belly surged up and up and up. Sara moaned and rubbed her clit she screamed and came on the spot.

She heard shirks of pleasure coming from Jeanette's other nipple. Sara looked over to see Anna feverishly thrusting herself up and down on Jeanette's nipple. Anna looked like a woman possessed. She had her bloated tits wrapped around her swollen middle working them up and down as titty fucking her daughter's nipple inside of her.

I never knew she was such a nympho Sara thought to herself. She gasped in pleasure as she felt herself rise higher into the air along with Jeanette's growing tits. The lump in her belly jutted out further from inside of her. 

She needed more. She didn't know what Jim was at but these random thrusts weren't doing it for her "Jim would you stop playing around and just fuck your sister.” Sara called out egging her boyfriend on “I want to feel Jeanette's big nipples stretch me out more and more and more."

Jeanette heard what Sara had shouted oh my god she's up there too Jeanette thought to herself excitedly. I'm fucking two girls at once with my big sexy balloons. Jeanette couldn't help but moan at the thought. Shame Saras’ not quite as energetic as mom whatever she's doing up there it feels amazing. "Sara please, please, please fuck my other nipple I want to cum knowing I'm pleasuring two horny sexy bitches with my big fat nipples" Jeanette waited for some kind of reply.

"Tell Jim to pick up the pace then,” Sara called back “your nipples aren't anywhere near fat enough for me yet" Sara finished.

"Oh Jim fuck me, fuck me hard please, I want you to pump my zeppelins up and up and up till they're the size of houses" Jeanette's pleaded.

When Jim heard what Jeanette said he started thrusting harder. He could hear the combined screamed of the three women around him and smiled. "Jeanie I don't think houses will cut it when I'm done each tit will be the size of a mountain," Jim then started thrusting with everything he had.

Sara screamed in ecstasy Jeanette's nipple was now steadily getting larger inside her. She didn't know how her body was taking all that girth in. Though she didn't care, she just wanted it to grow and grow and grow. Taking a page from Jim’s mom Sara wrapped her mammoth mammaries around her nipple stuffed admen. 

Working them up and down Sara came immediately. Her stretched midsection was more sensitive than her clit could ever be. Sara continued to tit fuck Jeanette's nipple and began to bounce up and down fucking Jeanette's nipple just like her mom.

Sara came and came and came each one lasting longer, feeling better, more! She thought to herself there's got to be a way to make this feel even better. Sara looked over to Anna, she's always one step ahead of me Sara thought to herself. Now was no different Anna's tits were huge, bigger than her body. 

Anna was sucking on her nipples. Drinking the milk she was producing and making her tits grow. That clever pleasure-driven slut was all Sara thought before stuffing her nipples into her mouth. Wedging them against her distended belly to hold her tits in place. 

Sara wrapped her arms around her stretched middle and began sucking her tits. Sara couldn’t stop fucking Jeanette's nipple. Rubbing the sides of her, now taller than her torso, belly. As the nipple inside her body and her tits continued to swell. Each of Sara's raging orgasms continued to intensify. She just wished that her mouth wasn't full so that she could scream and shout and moan to her heart's content. But then her tits would stop growing and she couldn't have that.

Jeanette was sighing and moaning. Even with all the pleasures shooting through her body. The girls fucking her giant tits, Jim thrusting inside of her, but she still hadn't cum. She could feel it coming though. Her breath was getting short, she was getting more flushed, but the odd thing was that she could feel a pressure building in her tits. It was quickly rushing forward now towards her nipples.

Jeanette her tits were about to lactate. The pressure she felt was milk building up in her colossal tits. With all the stimulation Sara and her mom were giving her nipples how could she not milk? "Jim play with my clit I want to cum, I want to cum so bad,” Jeanette begged. “I'm going to pump those horny bitches full of my udder juice" Jeanette cooed in a sexy voice. 

Jim started playing with Jeanette's clit. While he was fucking her she arched her head back and screamed. The most powerful orgasm of her life rocked her body. She felt the pressure in her tits forcing its way up in her nipples. She was racked by what could only be described as pure bliss.

Sara felt the nipple inside of her swelling abnormally fast. Which was an odd way to put it all things considered, but it was getting much thicker. As she swallowed another mouthful of milk she realized what was about to happen. Jeanette hadn't lactated yet, she was about to pump them full of milk. 

Of fuck! I'm going to be huge! Sara screamed delightedly in her head. No sooner had she thought it Jeanette's nipples burst forth with milk. The large cylinder-shaped bulge in her belly disappeared. Gallon after gallon after gallon of rich, creamy, fatty milk poured into Sara's womb. Her belly expanded out fuller and fuller growing bigger than her in seconds. It now took on a round shape. 

Sara and Anna cried out at the same time. Their tits fell to either side and were quickly dwarfed by the two women's swelling bellies. Sara screamed and moaned and shouted as a perpetual orgasm continued to get more and more intense. She was pumped fuller and rounder by Jeanette's breast milk.

Jeanette's tits were growing out of control as another orgasm racked her body. Now that she had started cumming she couldn't stop. She came again and felt her tits pressing against the walls and ceilings even from downstairs. 

Up on top, Jeanette's tit's had grown so big, Sara and Anna's bellies were now pushing on the walls of the original room they had started in. The girls swelling bodies exerted so much pressure on the already damaged house that they soon found themselves outside. Wall and ceilings bursting away as they swelled bigger and bigger and bigger in all directions. 

Like dough rising out of a bread pan the two women’s tits and bellies continued to expand out of the house. It wasn’t long before the rest of the walls collapsed and Jannette’s blimps pushed out into the street.

Jim's cock and balls had swollen considerably, but he was still holding his load in. He knew that when he came to his lovely sister her tits would take off like rockets. He said mountains and he meant it. Jim was still in control here and he knew it after all if it wasn't for him none of their fantasies would be coming true. With a little tailoring to make sure his fantasies came true as well. 

Soon time to let you rip Jim thought looking at his still swelling dick. Getting fucked by a bigger and bigger well nipple in this case wasn't his idea that was one of the other girls fantasies but it was still kinda hot nonetheless he thought.

Sara could still feel her stomach stretching bigger and bigger. She doubted she would ever swell to the size of Jeanette's tits considering the size difference, but she still wanted to keep growing. It's too bad I can't reach my tits anymore she thought to herself I would love to have them growing too. 

I wish I was getting fucked so my tits would grow like Jeanette's Sara stopped for a second wait I am getting fucked by Jeanette's nipple. With that thought, her tits started growing again. "Oh god yes" she moaned Sara looked over at Anna. Sara had finally thought of something she hadn't. "Anna our tits grow when we are fucked" Sara shouted. Anna looked over at her "We're not fucking Jeanette's nipples she fucking us with them."

Anna's eyes went wide and she moaned as her tits started to swell on their own. She bucked and thrust against her swollen belly and tits "Ugh Fuck Yes grow my big fat tits fatter, and fatter, and fatter I want to feel like this forever more, fuck, more."

Jim looked at the scene around him "all these women are getting off around me" he mumbled to himself, "Maybe I should do the same.