Chapter Text
My name is Jack Palmer and this is the story of how me, my mom and my two sisters got shipwrecked on a remote island where weird fruit made us grow bigger and hornier, and how I ended up getting my sisters and then my mom very very pregnant.
Anyway, here goes.
I’m Jack, oldest son in the Palmer family. I’m 19 years old, about 5’10” with blonde hair and blue-grey eyes. Before the island I was nothing special to look at, skinny but not too skinny, with a faint bit of muscle. Before we started eating the fruit from that weird temple, my cock had been about 5 inches long and I really hadn’t had a chance to use it properly yet. I had fumbled around with a girl at school earlier in the year but hadn’t got past 3rd base.
I used to live in Connecticut with my Mom, Denise Palmer (38 years old, a registered nurse), my twin sister Sara (also 19), and my little sister Melissa (17). Dad died about 4 years ago, but he had been an avid sailor and we always went on sailing trips with him in his 21’ yacht. After he died, we didn’t go sailing again for a long time.
Oh yeah, how did we end up on the island in the first place. It was the summer vacation and my mom decided that we would finally take the yacht out and travel all the way down to the Caribbean, just like Dad had always wanted to do. We planned the trip for months, and the first few weeks of the journey went smooth as anything, and Mel got to celebrate her 18th birthday somewhere off the coast of Florida. A few nights later we had anchored near a small island that was barely visible on the maps as a tiny little unnamed dot. It was far enough south that the air was warm, the island was covered in bright green tropical-looking plants and we could even see coconut trees against the darkening sky.
I’m still not sure what went wrong, but we were all woken up in the middle of the night by a terrible crashing sound and the boat started listing horribly to one side. Water was pouring in around our feet, we were definitely sinking. I heard mom shout that the dinghy was gone, and that we’d need to swim to the island. I grabbed the lifejackets and helped my little sister put hers on, the water already around our waists. I helped Melissa over the side and into the water, and followed her. Sara was already in the water, and Mom came stumbling out of the cabin and fell into the water beside her. The four of us swam towards the silhouette of the island in the distance, which had only been about 300 feet away. There was a nasty moment when we reached the barrier reef but we got to the beach and lay there, panting in the dim light of the moon.
The next morning there was no sign of the yacht or the dinghy, only bits of wreckage that littered the beach near us. Sara had grabbed the emergency locker before we abandoned ship, so we had some fresh water, ration bars, a knife, a flare gun and a few other things. Mom had saved her medical bag too, so she bandaged up our cuts and made a splint for her ankle, which she explained was fractured from her fall on the sinking yacht.
—
The first two weeks on the island were the worst. We were stuck, we had lost the radio so we couldn’t call for help, and we were slowly running out of ration bars to eat. We had made a rudimentary camp on the beach where we had landed, a rough shack made from wood and sailcloth that was just big enough to fit all four of us cuddled together at night. Mom’s broken ankle meant she couldn’t really walk, so I were sent out to scout the island, walking along the beach in one direction and timing my journey with my watch. After about 3 hours I came back to our little camp from the other side, and we figured out the island must be about three quarters of a mile across. I had also found a freshwater stream about half an hour’s walk from our camp, and was sent back to fill the empty bottles we possessed.
The four of us were a sorry sight, wearing only the clothes we had slept in that last night on the yacht. I was wearing a plain grey t-shirt and sweatpants stained with salt from our swim, while my mom was wearing an old-fashioned button-up silk blouse and pants, my twin sister Sara was wearing a Stanford tank top with pink panties, and our little sister Melissa was in a crop top and matching shorts. I didn’t realize it at the time, but none of them were wearing bras beneath their tops. After a few weeks of constant sun exposure on the beach, we had all acquired dark tans with stark tan lines wherever our clothes covered us.
Mom kept a record of each passing day. After 3 weeks had passed, she sent me and Sara on an expedition into the island’s interior to find something edible. Armed with the knife and a compass, my twin and I set off into the jungle. We were scared, and flinched at every bird call and rustled leaf. I held her hand as we moved slowly through the trees, climbing over thick roots and past large ferns and thorny bushes.
After an hour of searching, we found a large fruit lying on the ground. I had never seen anything quite like it before, it looked like a large pink mango. I cut the fruit open and the inside was filled a rich orange flesh, with a small stone at the centre. I took a bite, the flesh tasted very sweet but also sort of earthy, like a mushroom. I offered some of it to Sara, and between us we quickly ate the whole thing.
Looking for the tree it had come from, we quickly discovered an entire grove of trees that were heavy with more of the mango-like fruit. In the middle of the grove there was a low stone building, barely more than a box made from flat pieces of rock fitted together. We both froze in fear at the sight of it, and of the two figures standing nearby.
The figures were tall but weirdly disproportioned. We crept a bit closer and realized they were roughly-carved statues of a man and a woman, standing either side of the open doorway and facing each other. There was no doubt they were a man and a woman, the man had a comically large penis sticking out from his groin, easily two feet long and curving upwards. The woman had huge breasts, both bigger than her head, but they were resting on top of a large spherical belly.
Sara and I looked at each other, and back at the statues. We started laughing, mainly out of nervousness. We had a look round the building, it looked like a temple out of Tomb Raider, just a lot smaller. Barely big enough for a single room inside, with a large low stone table in the centre. Sara joked that it was a sacrificial altar, but there was no sign of use - the table was smooth and the whole place was covered in moss and tree roots.
I suddenly remembered what we came for, so we went back to the trees and gathered as many fruit as we could carry in my t-shirt, then set off back to camp with our spoils.
—
Back at camp, Sara and I explained to Mom and Melissa about the grove near the centre of the island, describing all the fruit trees and the little temple. We all ate as much fruit as we could, realizing just how hungry we had all been after weeks of living on ration bars and coconuts. That night was the first time we went to sleep with full bellies since we had arrived, the four of us spooning each other in the tight space.
That night I dreamt of that little temple in the grove, and the two statues that stood there. I was looking at the statues, like I had done earlier that day, but then I thought I was one them. I looked down, a huge cock easily 2 feet long was sticking out from my groin, curving upward and painfully hard. In front of me, the female statue stood, dark skinned and gravid, huge breasts and pregnant belly rising and falling with her breathing.
The female statue reached out and gently wrapped her hand around the tip of my massive cock. I felt excitement arc through me like electricity the moment she touched it, like it really was part of my body. She squeezed it, and said something in a language I couldn’t understand, before kneeling in front of me and gently putting it into her mouth.
I groaned, and woke up. I could feel my own cock, not 2 feet long but regular sized, violently erect in my pants and pressed against my mom’s lower back. My face flushed hot and red with embarrassment that my mom would feel my cock poking her, if she was awake.
I gently extracted myself from the sleepers and went outside. The moon was full, and the night was fairly bright, almost casting shadows. I walked someway from the camp and sat on one of the rocks by the shore. My cock was still painfully hard, like in my dream, and was making a serious tent in my sweatpants. I sighed and pulled it out, and started to jerk off.
After a few strokes, I paused. Something felt different. My cock almost felt like it was thicker than before, my finger and thumb not overlapping quite as much as usual.
I looked down and my dick was definitely bigger than I remember, sticking out a bit further than I was used to seeing. II wrapped both hands round it, one above the other, and was amazed to see that the tip of it now stuck a little beyond my grip. I had been 5 inches before, but it looked like I was 6 inches long now.
I had gained an inch of penis overnight. I couldn’t help thinking about my dream, and the strange statue with its massive cock at the centre of the island. I jerked myself off harder, enjoying the feeling of my newly bigger dick in my hand. I was a little worried about how suddenly I had grown, but I reminded myself that I was only 16 and probably still had some growing to do, I had just done it very quickly. Besides, I told myself, bigger is better right?
I blew my load, several spurts of cum shooting out over the sand and the rock in front of me. It was the most intense orgasm I had ever experienced and my body convulsed with each shot of sperm. I felt utterly spent, panting in the moonlight as my dick slowly shrank back to its regular soft size.
With that done, I went back to the shack and slipped into the space I had left behind my mom, and went back to sleep.
—
Over the next few days, we continued to eat the remaining fruit we collected, and soon Sara and I were sent back to gather more. It was easier to find the grove the second time, and we came back with another t-shirt load of the strange mango-like fruit.
I didn’t dream about the statues again, but each morning I’d wake up and find my erect penis pressed against my mom’s back. I quickly got into the habit of getting up first and going for a walk along the beach, just so I could get it to soften before anyone else would see the tent in my pants.
Of course I would also check to see if it had gotten bigger. I didn’t gain a whole inch overnight again, it was definitely still growing, and would stick a little bit further out from my hand each time. By day 26 it was almost as long as my hand-span, which I reckoned was about 8 inches, and was thick enough that my hand could barely wrap round the whole shaft.
It wasn’t just my cock that was growing either. My balls felt heavier than they used to be, and whenever I did get a chance of some privacy to jerk off, every orgasm felt more intense and longer. One time I was able to sneak away from the camp during the day, and blew my load into my hand, I was shocked to see more than double the amount of cum I would usually make - the thick white cream quickly filled my palm and overflowed, splattering onto my feet and the mossy ground.
It was a few days after that when my mom sent Sara and Melissa to refill the water supply, leaving me alone with her. Thanks to her broken ankle she was still unable to walk, so she was sat on the beach watching the sea, splinted leg straight out in front of her. My mom was still in her satin blouse and pants, which were torn in places. Her brown hair was free, hanging to her shoulders, and she had her arms crossed over her chest.
“Jack”, she said quietly. “I know it must be tough being trapped here with your mom and your sisters. I know that young men are full of hormones, but you really need to keep yourself in check while we’re stuck here so close together.”
I denied knowing what she was talking about.
“Oh for god’s sake… I’ve felt your penis getting hard at night. And it feels like every night. Are you masturbating at all?”
My face went white.
“I’m a nurse honey, I regularly deal with far worse than a horny teenage boy. Are you managing it?” she said, severely.
I hesitated, then explained that I sneak off sometimes. Mom nodded approvingly.
“Good. That’s a perfectly healthy thing to do, and I don’t want you getting all pent up, not in such close proximity to me and the girls.”
I went bright red. Then I finally swallowed my embarrassment and told her about the growth.
“What? How much?” she asked. I explained that I’d gained at least 2 inches.
Mom thought about this for a moment. “Can you show me?”
I fumbled about and pulled down my pants, freeing my cock. Even soft it was noticeably bigger than it used to be. Despite the fact that my own mother was staring at my naked dick, I felt myself starting to harden. Quickly it was at full mast, 7.5 inches of my teenage cock pointing straight at my mom’s inquisitive face.
“Well, that’s certainly big…” she said, cautiously. “And this happened in the past week?”
More or less, I admitted. Since we went to the temple. I gasped as she suddenly took my cock in her hand and gave it a professional once over. She even poked and gently squeezed my balls.
“Hmmm. No obvious lumps or blockages in either the penis or testicles, everything looks and feels fine.”
She sat back and sighed. “I should probably tell you that you aren’t the only one who started growing. My breasts have definitely gotten bigger as well, I used to be an E cup but now it’s more like an F cup, I’ve not been this big since I was breastfeeding you and Sara.”
I gulped, and looked down, there was no doubt Mom’s blouse look tighter in the chest then it did before. In my weirdly horny state, I was amazed I hadn’t noticed before.
“It’s not just me, Sara and Melissa have too. I’m not sure if they’ve noticed yet, but they’re both growing too.”
My brain fizzed with the thought that I was trapped on an island with three pairs of rapidly expanding boobs. I knew it was gross to think about my own mom and sisters like that, but I couldn’t help myself, my hand sidled over to my hard prick and started working it.
I was jerking myself off in front of my mother.
“Oh dear, looks like my little Jackie’s got a big problem,” Mom murmured, and I was shocked to see her reach forward and replace my hand with her own. She started tugging on my shaft. This didn’t feel like a nurse giving me a physical, this was my mom jacking me off.
“Oh god mom” I moaned, letting her do it.
“God you’re already so much bigger than your father was. He always loved my boobs, loved the size of them, loved the feel of them. Is my little Jackie a boob man too?” she cooed, and started to undo her blouse.
The sheer satin fell open, revealing her trim, 36 year old body. She had a surprisingly flat stomach, but what drew my attention were the pair of voluptuous breasts that jutted out above it. Each one was topped by a large, dark areola surrounding a fat nipple. She cupped one of her boobs in her free hand, kneading it gently as she worked my dick. I couldn’t look away from the sight of my mom’s delicious tits. I reached down to grab one but my mom batted my hand away, denying me.
“If we keep growing like this it won’t be long before we won’t fit in our clothes any more” she explained slowly and sensuously, jerking me off in long, practiced strokes. My mind raced back to the image of my mom and my sisters, each walking around with a massive pair of breasts on display, just like the temple statue.
I groaned, and warned my mom that I was getting close.
“Go ahead honey, you can do it on my tits. Just this one time.” she said, throwing off her blouse and taking hold of her boobs to give me a canvas.
I grabbed my dick and worked it hard, feeling the cum bubbling up from my balls. The first shot of thick white sperm flew from my dick and splattered my mom right in the face. I quickly pointed down and the next jet went all over her cleavage. The third one splattered one boob, the next splattered the other. I unloaded all over her chest for what felt like hours, but the flow quickly subsided to a dribble.
“Well…” my mom said, gazing at me through cum-spattered eyelashes. “You certainly did a number on me there, honey.”
I looked down, and saw that my mom’s breasts were absolutely spattered with criss-crossing lines of cum, easily four or five times as much as I’d normally produce. My seed was hanging from her chin, puddling in her cleavage, and dripping from her nipples. She looked like a Jackson Pollock painting, done in white on pink and caramel.
“Jesus Christ, Jack.“ she murmured, examining herself. “That’s… I’ve never seen… so much.”
She looked straight at me, serious all of a sudden. “I meant it when I said that this was a one time thing. You’re responsible for blowing off your own steam from now on. I want you to promise that every morning you’ll go for a run and sort yourself out, nice and far away from us. Do it again in the evening if you have to.”
I agreed, still staring at my cum-splattered mother and down my still-dripping softening dick, amazed at what had just happened.
“You’re not the only one who’s struggling, you know” Mom said. “Women have hormones too, and we get horny. I’ve told the girls to sort themselves out regularly, same as you. I don’t want you walking around or sleeping next to us with an erection in your pants, it’ll only make things worse. For everyone. Now you’d better help me down to the sea so I can wash all this off.”
I assented, and helped her to her feet.
While she was bathing, Sara and Mel came back from the spring with bottles of fresh water. I couldn’t help but notice that their tops were indeed tighter around their boobs than they were before. Sara had been fairly average in the chest department before, but was definitely showing more cleavage than she used to, while Mel, who had barely any tits to speak of, well her crop top was sticking out a fair bit more than before we got shipwrecked.
I felt my dick twitch at the thought of them both growing bigger, and tried to look away.