A red sedan pulls into the long driveway off a quiet back road in the sleepiest town in the Pacific Northwest. The vehicle lights click off and John appears from the driver’s side door. He looks pensive, wary even. He should be excited - this is his first trip home since he started college on the other side of the country. It would be good to see his parents, his childhood bedroom, and all his friends. That, however, would not be the case.
He wasn’t going to see his parents. Their divorce was finalized a few months into his first semester and Dad was all too quick to marry his mistress. John was glad he wasn’t going to see them on this trip, he didn’t know what he’d say to his Dad right now.
He wasn’t the house he’d grown up in. This was the new house John’s new stepmom requested for herself and her daughter, Beth. Apparently, Beth needed wide open spaces. Sounded like they were talking about wildlife rather than a person.
He wasn’t in his hometown. Dad left the house to John’s Mom and hopped a few states north.
To put it plainly, everything was alien to John. The only reason he was here instead of his Mom’s place was the offer from his Dad to fly him ‘home’ for free. John was in no position to bargain, so he took the ticket and now he was here.
John’s Dad and Step-Mom were taking an extended honeymoon through Europe for what seemed like the rest of the year, so John had the home all to himself for the entire summer. He unpacked his bags from the rental car and headed to the front door. As he got to the front door, John reached to the top lip of the door frame and retrieved the spare key. With a flick, the lock turned, the door was open, and all John could see was darkness. He flicked on the lights and dropped his bags at the front entrance while he investigated the house.
It was ornate but subtle. A three-story house with ceilings that looked taller than any he’d seen in a house before. 15 feet of space in each room? It seemed excessive. That said, the rooms still felt cozy and the most incredible view was in the main living room. Windows stretching from floor to ceiling gave way to an incredible view of the valley the house was settled in. Below, John could see the sleepy town nestled in between the two mountains, and all the tiny homes dotting their way up the mountain slopes.
John didn’t know how long he’d been standing there, taking in the view, but his soul nearly left his body when he heard a voice.
“You mind telling me what you’re doing here?”
John jumped at the voice and fell to the floor. Before him stood a 6’5” tall amazon of a woman, with python-sized arms and the curviest body John could imagine. Her tits nearly stood out a foot from her body and her hips looks like they were built for breeding. He picked himself off the floor, adjusting his growing boner so as not to draw attention to it.
“Uh… this is my home? Or, my Dad’s home…” He was cut off.
“Ohhh… you’re John. I was wondering when you’d get here. I thought it would be earlier. It was quite a surprise for me to come home to my house to see a strange man standing in my living room.” This was Beth… John’s 19-year-old step-sister.
“That makes sense, sorry about that. I didn’t know anyone would be here.” John took a seat on the extra-long couch as Beth walked to the kitchen attached to the living area.
She continued, as she grabbed a protein shake from the fridge, “You and me both. But our parents were never strong communicators, were they? At least my Mom wasn’t.” It was true, it was one of the key problems with John’s parents. Apparently, those problems have carried over. “I was surprised you didn’t come to the wedding. It was small, at the local courthouse here in town.”
“I… couldn’t pull myself away from my studies,” John struggled not to eye her figure, clad in a tight, ill-fitting full-body workout suit. “I’m studying to be a microbiologist and the course load is pretty intense. To be honest, I shouldn’t even be taking this summer off. I should be taking courses to get ahead.”
“I feel you. I’m getting my MBA at the university two towns over. I just needed a break from the hustle, you know?”
“I definitely feel you there.” John turned to look out the enormous window. “Well, this place is big enough for the two of us. I can stick to my room and be out of your hair for the next few months.”
“Oh, I don’t mind. It’ll be fun to have a little brother to hang out with,” Beth’s words felt purposeful, heavy even. What did she mean.
“Well, not to correct you, but I’m actually 20, so I’m a big brother in this scenario.” John tried to laugh this off, but Beth shot him an interested glare.
“...Of course you are,” Beth walked towards him, her hips swaying as she got closer. She came into focus and John took her in. She was enormous. Her muscles were bulding off her in places he didn’t know he could gain muscle. Her breasts jiggled like bowls of jello with each step, but most surprising was her crotch. At eye level with John was a gigantic bulge! John couldn’t tear his eyes away, it was as if she was packing the largest penis he’d ever seen. But that can’t be… how is this possible.
As Beth stopped only a foot away from John, he could feel the heat coming off the bulge. She made him feel small, and it looked as though she liked it. “It’ll be good to spend time together, big brother.” Her bulge tensed on the word big, and that was that. Beth exited the room and headed to her bedroom. John took a few minutes to catch his breath and make sure some of the blood flow to his dick had subsided. After about 10 minutes, he collected his bag and headed to his assigned room.
It was a standard guest room, but there was a note on the bed side table. “I’m excited for our time together!” It was a note from Beth. What could this mean? His eyes scanned the room for any other signs of her, and there were. On the bed, it was clear she had been sitting on it. Her large ass left a massive imprint, along with her impressive bulge. It wasn’t long before John was stroking his cock, thinking of Beth pinning him down and fucking him as hard as she could.
Feeling her muscles flex around him, being smothered by her ass or giant tits, she was a perfect woman. The image of her cumming on his cock did it for him, and he unleashed an ungodly amount of cum. He’d never orgasmed this hard in his life. This might be a more interesting summer than he expected.
~~~
Every day, John could tell Beth was eyeing him. She would play little games with him, taunting him. If he couldn’t reach something on a tall shelf, she would appear behind him, pressing her body and curves into him while she reached it. She would finish the last snack he had set out from himself, as some sort of power move. It all came to a head when he was watching his favorite show on the TV in the living space. Out of the darkness of the hallway, Beth emerged. She was in some sort of form fitting body suit she used when she was working out (which must have been the only hobby she had), but this one was different. This one was… smaller? Had she been tacking on muscle since they’d arrived here?
“Do you want to watch with me? We can turn something else on, if you’d like.” John offered, staring at the veins running down her arms and legs.
“That’s so sweet, John. I actually need your help. I’ve been feeling so strange these past few days, and I think I need some assistance.” She didn’t sound concerned. It was like she was reading a script. This was rehearsed. John decides to play along.
“Alright, how can I help?”
“Well… Can you check my suit? Something feels a little….” she paused as she started to flex. Like, really flex. Her muscles doubled, no tripled in size and her suit began to tear. John leaned away from her, this monster, as her clothes fell away and all that was left was a busty, fertile goddess. “...tight.”
She turned to face John, and the mystery of the bulge was solved. Tightly packed in a g string with some sort of compression sock was an enormous cock. Not ‘porn star’ big, more like goddess big. With a flick of her hand, she tore away the last remaining shred of clothing and John was witness to a real-life goddess.
“What … what are you doing, Beth?” John stammered in fear, but his cock betrayed him.
“John, sweetie, I see how you look at me. At my curves, my big heaving tits, my round, birthing hips - I know you want me. I’m not one to play games for long, so I’d rather we skip the courtship and get right to the fun part.”
“We can’t… we’re…”
“Step-siblings, John. We’re strangers to each other. Strangers who are locked in this house together for the summer and we both want each other. So why hold back?” John didn’t have an answer. “Come here, John.”
His body wasn’t his to control. John’s deeper desires were in the driver’s seat now. He approached her and Beth took his hand. “Don’t be scared, I won’t bite.” She bit her lip as she rubbed his hand on her monster cock. John could feel her heartbeat pump through it as he felt it harden.
“Holy shit!” John yelled as she made him rub her growing member.
“Yeah, it’s a little…mmmm… big” she was toying with him. This was legitimately the biggest cock on Earth. It grew past a foot long… then two feet… and when it finally hardened fully, 3 feet of cock was staring John right in the face. Oozing pre-cum and just begging to be sucked. The pheromones coming off it were too much for him, and slowly, his tongue snaked out of his mouth and slipped into the tip of her penis. “Mmm yes John, fuck that feels good.”
John’s other arm wrapped around her thick cock and began jerking her off as hard as he could. It felt like trying to rub off a tree trunk, but whatever he was doing, Beth was loving it. She braced herself against the wall behind her, panting and groaning as she grew closer to cumming.
“Fuck! All that teasing this week was too much for me! I’ve been holding it all in for you, John.” John was confused until he felt her hand wrap around his head. “Hope you can take it all! FUCKKKK!” She screamed as her cantaloupe-sized balls flexed and gallons of cum came shooting down her cock. John felt like he was drowning until he could get into a rhythm of breathing and swallowing cum. It was too much. He was swallowing more cum than any person in history and it didn’t look to be stopping.
“Fuck fuck fuck! Yes John, drink my cum!” She was a wild animal, and John was near orgasm himself if he wasn’t so focused on breathing. Eventually, the orgasm died down and Beth fell backward, collapsing against the wall. “Good work, John. Now comes the fun part.”
“What do you mean?” He got his answer soon enough. His skin all over his body tingled. His clothes felt as if they were shifting, and John looked around frantically to see what was happening. The world was slipping away. His head slipped through the neck of his shirt as his feet shrunk out of his shoes and up his pant legs. From 6’ to 2’ feet tall in just two minutes, John had to crawl free from his clothes, now standing naked before Beth. “What the fuck happened to me?!”
“Oh, don’t freak out, John. You’re still my big brother.” She played with her engorged nipples as she watched him get his bearings. “I’m a special girl, John. I can give you this gift while you just gave me yours.”
“What does THAT mean?” Again, he spoke too soon. Beth closed her eyes and moaned as the growth started. It began with her hips and tits, filling out further. Then her muscles bulged and gained even more definition. Finally, it was her height. She started to pick up whole feet in record time. From 6’5” to 10’2” in 5 minutes, all the while growing hornier and stronger. Eventually, the growth stopped at 12” even. As it slowed, John could see her pussy beneath her cock leaking cum all over her balls.
“FUCK! I’ve never gotten this big before. It’s like we’re meant for each other.” Her voice was deeper from her growth. A large hand wrapped around John and pulled her closer to her body. “Now, it’s your turn, cutie.” With some careful maneuvering, Beth flopped her hard cock out of the way of her pussy to try and fit John’s shrunken cock inside her. After a few attempts, she tossed him aside, frustrated.
“Ugh, I may have made you too small, big bro,” Beth got to her feet, her head nearly reaching these raised ceilings. “Don’t worry though,” she fell to her knees, each one on either side of John’s head. “We can still have fun.” With that, Beth slid John’s body under her heavy, watermelon-sized balls to her gaping, dripping pussy. It looked hungry for him.
She crouched further down to have her pussy envelop his face as she began to ride him. Her massive ass cheeks covered his entire body. He was gone from the world now. For the foreseeable future, this would be his life. Beth’s little plaything. His only responsibilities were to drink her semen or girl cum and satisfy her whenever she wished. John would never say it, but this was going to be the best summer of his life.
THE END