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Tonight Pretend I'm Not Your Sister

Tonight Pretend I'm Not Your Sister

by Achencheres
19 min read
4.41 (63500 views)
sisterimpregnationbrother sister incestbrother sister sex
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Erik turned off the motor, letting the boat glide silently towards the dock. As it neared, his little sister Jenny deftly grabbed the mooring ring and pulled the rope through. Securing it with practiced ease. They had arrived at one of the thousands of islands scattered across the Stockholm Archipelago.

"Here we are," Erik said, glancing at Maria, Niklas' new girlfriend and the only one among them who hadn't visited the cabin before. "I warned you it was pretty humble. I hope you aren't disappointed."

The smell was the familiar mix of the salt from the gentle waves of the sea lapping at the rocks beneath the cabin and the pine trees that covered the rest of the small island. It reminded Erik of the many past summers spent here.

"This place has been in our family for over a hundred years." Erik jumped from the boat onto the wharf and offered his hand to help Maria. She accepted and easily pulled the slim girl up.

"Does your family have anything like this in Portugal?"

"My family owns an old house out in the country where we go for holidays."

"Old house?" Niklas chimed in with a grin. "It's a thousand-year-old castle her family owns."

"It's a very small castle," Maria said with a laugh, "and not on the water in a lovely space like this."

Niklas had met Maria while studying at Oxford. It didn't surprise Erik that a wealthy aristocrat was exactly the type of person you would meet there. At his own school in California there were also plenty of rich kids, though few of them owned castles.

Erik looked at his family's cabin. Seeing it afresh through the eyes of the new arrival. It was a small plank building dwarfed by the large trees around it. The red paint was faded by the sun and the salt air.

It wasn't a castle, but it has a very special place in his heart after coming here every summer for each of his twenty-two years.

Distracted, he had forgotten to help the others out of the boat. Brigit was balanced on the side, and Erik swiveled over to offer her the same arm up as he had Maria. He helped her up. It was a bit more effort to lift up the much taller blonde. Erik then offered his arm to his sister, but Jenny ignored it and leapt out of the boat on her own. Her long legs gracefully getting her up onto the dock on her own.

Niklas and Kristian, still in the boat, started to pass up the supplies. All the food, water, and booze that was meant to last the six young people for a week on the island. Two couples. Niklas and Maria, Kristian and Brigit, and then Erik and his little sister Jenny.

-------

The rest of the afternoon was spent getting set up. The wooden floors of the house creaked as the six young people unpacked everything into its space. Erik showed everyone to their rooms up on the low-ceilinged second floor. There were three. The one in the middle had twin beds. Jenny and he would be there, with the two couples in the double-bedded rooms on either side.

The group ate a late dinner sitting on the dock. The July sun setting behind the cabin as they ate the simple dinner they had thrown together in the small kitchen.

Conversation flowed easily, mostly revolving around Maria, the newest addition to the group. She knew a few words of Swedish, but the group stuck to the English they all were fluent in.

"Have the rest of you all been to Erik and Jenny's cabin before?" Maria asked.

"Yep" Niklas said between big forkfuls of beef pasta. "Erik, Kistian and I have been friends since we were kids." Kristian explained. "We've been coming here forever--first with our parents, then just the guys."

"And Brigit and I have been best friends since kindergarten." Jenny added. "So she has also been coming here for years. This is the first time she and Kristian are here together as a couple."

"Oh, that's cute." Maria said, smiling. "How long have you been together?"

"Three months," Brigit replied, her eyes briefly meeting Kristian's. They were still in that early phase, always touching, always on the verge of drifting into their own world.

"So you and Jenny are the same age then?" Maria asked.

"Yup, Jen and I are still nineteen, " Brigit said. "while the guys are all twenty-two."

"Hey, I'm still twenty-one for a few more weeks. Niklas chimed in.

"And you and Kristian are still based here in Sweden?" Maria asked Brigit.

"Yep, Krister is at school, and I'm trying to make it as an actor."

"I'm sure you will succeed." Maria happily suggested. "You're so pretty."

"No shortage of tall blondes around here, unfortunately."

"You should move to Lisbon. You would stand out there."

"If I really want to make it as an actor, I need to move out to California with Erik."

"You are at school over there?"

"Yep Erik is studying computers at one of the fancy American schools. He is very smart and is going to be very rich someday." Niklas interjected.

"Oh which school?"

"Stanford."

"Wow, where all the future billionaires go?"

"I'm not interested in that. I just want to build cool things that make the world better."

"That's a very Swedish thing to say" Maria said with a chuckle. "Do you have a girl back in California?"

"He did," Niklas told her, "but she dumped him a month ago via WhatsApp."

Erik was annoyed and embarrassed by his friend revealing his secrets, but he smiled and tried not to show he was upset. Nik has always been too happy to gossip. The big man with the long blonde hair was never happier than when digging into someone's romantic secrets.

"What about you, Jenny? Are you studying?"

"In a month, I start university at Stockholm. I'm staying close to home for now."

------

After dinner the group continued to chat and drink out on the dock as night fell. Alternating between gossip and trying to solve the world's problems in a single evening.

Erik felt the need to do some tidying and took the dinner dishes into the cabin to wash them. Brigit helped him, and the two of them were alone in the small and rustic kitchen.

Erik had known Brigit since she was a little girl. She had been his sister's inseparable friend for years. The two of them even looked alike. Both had the same build: tall, thin, with long blonde hair. There were differences of course. He couldn't help but notice that Brigit had grown a more impressive set of curves than his sister. Bridget also had a rather dull set of grey eyes, not the radiant blue eyes that both his sister and he had inherited.

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Erik had for years had a crush on Brigit. She was cute and a genuine and caring person. For years he had dreamt of holding her and thought that she may have felt the same way. Yet the time had never seemed quite right to do anything about it. He had never worked up the courage to do anything about it. The risk was always too high with her being his sister's best and only real friend.

He had not been happy when he came back home and discovered that while he was out of the country, Brigit and one of his own best friends had become a couple. Krister was a bit of a dork but was a good dude and he would treat her well. Still, Erik felt a loss of his years-long dream that someday he and Brigit could have made it work.

"It's good to see Jen so happy." Brigit volunteered.

"Yes, she really likes all of you, and I think she feels very safe here on the island."

"It's such an improvement from even a few months ago."

"You need to take a lot of credit for that. My parents say that you were an incredible help over all of this. You really helped her through it."

"I tried, but it has a lot more to do with Dr. Svenson and Jen getting proper care."

"You did a lot. I still feel guilty for being out of the country for most of it." Erik felt bad. He should have been there to protect her, not continents away.

Jenny had a rough last few years of secondary school. She had been badly bullied by some other girls for months but didn't tell anyone until she had a breakdown and fell into a mental state where interacting with anyone other than close friends and family caused her so much stress she refused to leave the house for months.

Eventually Jenny received counseling, was given some pills, and everything seemed hopeful that it would be okay. She was set to start university as normal in the fall.

------

Not long after dark, the six of them retreated to bed. Jenny and he settled in their room. It was small, like every other room in the cabin. The sloping roof made them take care not to hit their heads. The twin beds were less than a meter apart.

It had been some years since he had shared a room with his kid sister. As she reappeared after changing into her sleep shirt he couldn't help but notice how much she was now a grown woman. Not the little girl he still remembered her as.

"Is it okay if I keep the light on? I would like to read for a bit before going to sleep."

The cabin had no internet. Erik was happy to be reading a real book for once.

"Sure, bror, but not for too long."

Jenny turned herself towards the wall. Her golden hair spilling out on the side facing him.

He only read for a few minutes when the sounds started. The walls of the cabin were little more than plywood, and any noise slipped through easily. He could tell in an instant what was going on next door. The rhythmic moving of a mattress and the muffled sounds of female pleasure. It took him a bit longer to figure out that it was Kristian and Brigit on the other side of the wall from his bed.

His book was forgotten as he focused on the sounds of what could only be energetic lovemaking. A picture of the scene just beyond the wall appeared to him. The pretty girl he'd known for years being banged by his close friend.

From the sounds he could even tell that she was on her back. Her soft moans coming from below the masculine grunts of Kristian. Erik could picture the scene just across the wall. Her long blonde hair spread on the pillow. Her thin legs open wide as his friend held himself above her. Kristian's long blonde hair would be falling down onto her face as he pounded the pretty girl. His broad shoulders and tall height meant his much larger body would completely cover her smaller frame.

Erik noticed that he was painfully hard.

As Erik listened closely, he became aware of another set of sounds. Beyond the other wall beside his sister's bed. The same rhythmic noises mix with an occasional high-pitched yelps that he now knew came out of Maria when she was getting laid. He pictured that scene as well. The pretty girl with the big brown eyes was getting fucked by his oldest friend.

Erik was now horny, envious, and embarrassed to be listening in on his friends' most intimate moments. It shouldn't have been a surprise, what else would a young couple do on holiday as soon as they get into bed?

Then his sister turned over, locking eyes with him. Erik's face turned beet red with embarrassment, knowing that his sister was also aware of what was going on on either side of them.

She didn't think the same way. Instead, her face had a mischievous smirk.

"We should gently let them know tomorrow just how thin the walls are here." Erik eventually whispered across the gap between their beds.

"You're such a prude, bror."

"We shouldn't be able to hear all that."

"What, you thought our friends were saving it for marriage? Of course they're screwing. Don't be so shocked."

"Since when did you become such a hippie?"

"It's not a big deal." Jenny said with an air of superiority. "Brige tells me everything that she and Krister get up to. I'm sure I will get the full replay of what they got up to over breakfast tomorrow anyway."

"Hmph." Erik grunter with nothing better to respond in annoyance. He turned out the light, put the pillow over his ear, and tried to get to sleep while the sounds were muffled, but he tossed and turned unable to do so.

His real problem was how wired up he now was. What he really needed was to get some release. He looked across at his sister. She was still clearly visible in the moonlight. Her eyes were closed, her face blank and calm, but he couldn't be certain she was asleep. It was too risky to try to jerk one out so close to her. Erik suffered into the night before drifting off.

------

The next day was fun and work. There were always projects to be done around the cabin they spent the morning tearing out the wood from a window frame that had rotted in the salt air. They had brought a replacement window that they then slid into the frame. The hard work was almost enough for Erik to forget about the night before.

The afternoon reminded him. The plan was to go swimming, and as soon as the three girls appeared in their bathing suits, his hormones again surged. He almost choked on his beer as all at once the three young women appeared. Maria and Brigit were stunning in bikinis. His sister had a more conservative one-piece, but it still hugged her body close enough to prove her beauty.

Erik tried to act like nothing was of interest. He knew he needed to not gawk at their exposed skin, and he managed to control himself. Almost. He realized that very soon one look at his bathing suit would give away his interest. He had only one option.

"Time for a swim, everyone!"

He leapt off the dock and into the water. The frigid splash quickly fixing his problem.

Soon the five Swedes were all in the water. Maria was more reluctant.

"It's so cold! How can you stand it!" He winced as even sticking a foot in seemed to cause pain.

"Once you're in, you'll get used to it."

She did eventually get in, but didn't last long. Retreating to the dock while the rest of them remained in for longer and teased the wimpy southerner.

------

That night was even worse. Once again, as soon as they went to bed, their neighbors began their noisy exercises. Erik's mind was still filled with the image of the three girls in their swimsuits. He had been horny all day, but had never had a chance to jerk off. He needed relief.

"I'm going for a walk for a bit let the rest of them calm down."

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"Outside? It's cold."

"Sure, just for a bit."

"Do what you want." Jenny rolled over and closed her eyes.

Erik threw on a sweater and went out back. It was quiet here in the dark. He couldn't hear any noises from within the house. Checking once more that no one was around, he pulled out his dick and leaned against the wall. He began to pump. His brain danced between the different girls. Tall blonde Brigit, cute little Maria. He shouldn't be fantasizing about his friend's girls, but he couldn't help it. Even worse a third girl's body kept entering his fantasies: his little sister. He didn't want his sister there, but her bright blue eyes and slender body kept insisting.

It didn't take long for him to finish. With a grunt, he shot his seed on the rough ground outside. He took a moment to clean himself up, then headed back in.

Turning the corner, he almost ran over his sister.

"Jen! What are you doing here?"

"I thought I might come outside too."

"Were you watching me?"

"No, I just got here." The smirk on her face made her lie obvious.

The two headed inside and to bed. Erik's cheeks red with embarrassment at the thought that his little sister had caught him.

------

The next day they needed more supplies. They were low on propane, and the beer was running out. Erik needed to take the boat to Stavsudda to get more supplies. Their guests were happy to stay on the island, so it was only Jenny and him that made the trip.

The two siblings chatted as the motor sped through the waters and channels that separated the hundreds of islands.

"Are you having a nice time with everyone?" Erik asked.

"Yes!" His sister beamed. "It's so nice seeing everyone again and getting to spend time with you. I'm so sad that you have to go back to California in a few weeks. I just want to savour this trip as much as possible. Are you having a good time?"

"Oh, it's lots of fun." He said more hesitantly. "But you don't find it's a bit hard being alone with the couples?"

"No."

"I guess I'm still hung up on Emilia. We had a good thing all year at school. I didn't expect she would break things off after being apart for only a couple of weeks. Seeing the other two so happy just rubs it in. No offense sis, but next year I'm hoping I'll be here with a girl of my own."

One look at Jenny made Erik realize he had hurt her. "You don't like being here with me?" She asked sadly.

"No! It's not that." He tried to recover. "I just miss having some romance in my life. You don't wish you had a boyfriend to bring along." Jenny had dated a few boys, but none of them were serious as far as Erik knew.

"No. I'm happy being here with you."

Jenny still seemed upset. Erik wrapped his arms around her. Pulling her close as he piloted the boat. A smile reappeared on her face as he held her close.

------

The fourth day was more of the same. Swimming, hiking, repairs to the house. That night they had a campfire. They roasted sausages over the fire for dinner and stayed around it long past dark drinking beers and chatting.

After some yawns, the other two couples went to bed. Leaving only Erik and his sister around the fire.

"How about we wait out here a while tonight?" Erik suggested.

"It's too cold out here."

Jenny already had a blanket wrapped around her and up over her head, babushka style.

"Come sit next to me then." Erik offered.

His sister moved over to sit next to him on the log by the fire. Erik wrapped his arm around her to lend some warmth.

"I was just hoping we could miss the performances from our neighbours for one night."

"You still embarrassed by that? You're such a prude."

"It's not that. It might be different for girls, but all the swimsuits, all the night-time fun. It really winds a guy up."

"Girls get horny too."

"You find Krister and Nik attractive?"

"I guess so."

"It's just hard being with two very loving couples and having to share a room with the one girl in the world I'm not allowed to fuck."

Erik was rarely so crude, and never around his sister, but his frustrations were boiling over.

"Maybe one of us is adopted?" His sister had a grin on her face that Erik had never quite seen before.

"Not a chance. Everyone always tells us how alike we look."

"Maybe for tonight we could pretend one of us is adopted."

By all formal tests, Erik was very smart. His IQ was towering, but it took his brain a very long time to realize just what his sister was offering.

He looked down at Jenny. Her blue eyes looked directly into his. She was so beautiful. Her lips were slightly open. He was desperate to lean down and kiss them, but he couldn't. She was his little sister. His job was to take care of her.

Instead she took the initiative, reaching her head up so that her mouth met his. As soon as her soft lips met his own, his resistance crumbled. He wrapped his arms around his little sister and kissed her with more passion than he ever had another girl. Their tongues danced against each other as their hands began exploring each other's bodies.

He slipped his hand under her shirt. Running it up her smooth belly. Continuing up until his hand was cupping a perfect breast. His sister's perfect breast. His hand was somewhere it should never have been. There was no objection from Jenny. The opposite. Her kisses increased in energy as he gently massaged her tit over her bra.

He could have her. She loved him. He had never realized how deeply she did until this moment. She wanted him. He couldn't do it. He had to resist. Bottle up his pent-up desire. She was his little sister. She was fragile. He couldn't do this to her.

Then her small hand brushed his lap and found the hardness under his pants. She began to massage him through the fabric. He pulled out from their kiss and locked eyes with his little sister. Her bright blue eyes told him everything. She wanted him. She needed him. He needed to give her what she wanted.

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