Tonight Pretend I'm Not Your Sister

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.

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."

"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.

He realized that someone looking from the house might be able to see them.

"We should go inside."

They almost ran to their room at the cabin. He should have shut the whole thing down. It was his job as big brother to protect her. But as she hurried up the stairs, her cute little butt bobbing in front of him, he knew that no force in the world could hold him back from possessing that beautiful body tonight.

Once in their room, they returned to trading passionate kisses. They only broke lips when they needed to shed a piece of clothing. He helped undress her. She helped undress him and in moments both were naked.

Her body was perfect. Her skin was smooth and glowing with gentle curves and ridges that he longed to explore, but that would wait. For now he was only interested in that small tuft of blonde hair that marked his sister's most forbidden treasure.

He could again hear noises from either side of them as the two other couples enjoyed each other. Soon all three rooms would be filled with lovemaking.

He directed her towards her bed when suddenly he realized a problem.

"I didn't bring any condoms." He whispered.

"Oh no." She bit her lips and seemed worried. "I didn't either."

Neither of them had planned on sex this week. Why would either of them have brought protection? Erik despaired. Was he going to be denied?

"You have to promise me," she said decisively. "Promise me that you will pull out."

"Absolutely." Erik would have promised her anything in the world to continue.

Jenny lay back on her bed. Erik moved on top of her. He stared down into her blue eyes. The eyes that were a mirror of his own. She was so beautiful. He couldn't imagine a prettier girl in the world.

Her hand reached between them and grabbed him. Her cold little fingers felt like ice against his boiling member. She positioned him at her entrance.

With one thrust he was in. She yelped as he pushed his full length inside of her.

"We need to be quiet."

"I know. She panted.

He began to thrust in and out of her. He held her tightly. His mouth by her ear so he could whisper to her.

At first he tried to pretend it wasn't his little sister he was thrusting in and out of. That it was some other girl sating his lusts, but it was no use.

He was too aware that it was Jenny. Her touch, her voice, her smell. It could be no one but her. Being so close. Closer than he ever had been to her he could feel their connection. Feel that the same blood that pulsed through her veins was the same blood that coursed through his own. The bond he felt between them was so much stronger than that between any normal lovers.

Any understanding that what he was doing was wrong was erased in the magic of the moment. Sex with her was different than any he'd had before. She trusted him completely and she was giving all of herself to him, and he was giving all of himself to her.

Far too quickly he realized he was in trouble. He was close to cumming. He tried to think of math problems, of tomorrow's construction projects. He tried to think of anything but the beautiful girl whose unguarded pussy he was thrusting in and out of.

It wasn't any good.

"I'm close. I need to pull out soon." He whispered into her ear.

"Nooo..." He had never heard her so plaintive. "I'm close too. Just hold for a bit longer."

He managed to hold for a few more thrusts. Jenny's breath was getting shorter. He could tell she was close, but the thought of bringing his sister to orgasm only enhanced his own problems.

"I need to pull out now."

"A bit longer," she gasped back at him. His sister's long legs were wrapped around him. Pulling him into her.

"If I don't pull out now, I'm going to cum inside you."

"I don't care!"

That was too much. She had given him permission. He knew coming inside the fertile unprotected pussy of his little sister was the worst thing he could do, but that part of his brain was turned off. All he was thinking was that a beautiful girl had just given him permission to empty himself inside her.

He did.

"Oh, Jen! I'm coming!" He softly cried into her ear.

"So am I!" She moaned back at him.

With matching gasps of pleasure the two siblings came as his seed burst out of his body and deep into hers.

------

The two lay in each other's arms in her small bed. Both took some minutes before they could even talk.

"That was the first time, bror." Jenny announced with a contented smile.

"The first time you had sex!" Had he just taken his sister's virginity?

"No, silly, I've done that a bunch. You are the first man to give me an orgasm from just sex."

Erik felt like he had just won the Nobel Prize in lovemaking.

"You ready to go again?" His sister coyly asked.

He was after a few minutes of foreplay. The second round with his sister was slower and more passionate. They took time to explore each other's bodies while with a gentle rhythm he made love to her.

He discovered the special places on her body where if he touched or licked he could get a happy moan out of her. Eventually he put together a successful enough combination of such touches to wring a second orgasm out of her. Soon after he also finished implanting another batch of his risky gift inside her body.

-------

When Erik woke up the next morning, his head was pounding. The sun was already bright. How late had he slept in? He remembered the night before. It was so incredible. Could it have all been a dream? He couldn't really have fucked his own little sister? Couldn't have fucked her again and again until they were both exhausted.

It wasn't a dream. He was naked in Jenny's bed. His own bed across the room was untouched. He had never made it there all night.

He dragged himself to the main room. The rest of the gang were all there. Including Jenny. She was dressed and looked entirely normal. As did his friends.

It was after breakfast that he managed to get a private word with Jenny.

"Are you okay?" He asked nervously.

"Sure. Why wouldn't I be?"

"I mean about what we did last night."

"Last night was amazing!" Jenny flashed him her heart-melting smile.

She didn't hate him. That was good. But there was another worry.

"You won't tell, anyone will you? I know you and Brigit share a lot."

"Of course not, silly! I can keep a secret."

The rest of the day Erik pretended everything was normal, and it seemed to work. No one seemed to realize the life-shaking turn that he had taken that night.

------

There was no doubt that as soon as they got to their room that night, they would be again sharing a bed, but this time Erik was prepared.

"I snuck a few of these from Krister. He brought a whole box with him." Erik held up a string of three condoms. "They will need to last the week, though."

"Hah." Jenny laughed at him. "It's a bit late for that, bror. You came in me four times last night. I'm going to have to fix things once I'm home anyway, so why worry about those?"

Erik was unsure, but he wasn't about to argue as Jenny removed her clothes and lay back on her bed, her legs open invitingly.

They only did it twice more that night, and continued fucking every remaining night at the cottage.

Erik was paranoid that his friends would find out what they had done. He kept on alert for some hint they knew what was going on but detected nothing. Could they hear Jenny and him at night? If they did, perhaps they would think it was simply the other couple the room over the noises were coming from.

Jenny and he were careful to behave as normal during the day. It was only at night once the door to their room was closed that he would climb into bed with her. Wrap his body around hers and make love.

------

They had both promised that once back home they would return to behaving as proper brother and sister. That their rule-breaking passion was only something that would happen on that one holiday. That it couldn't be allowed to continue.

That lasted less than 24 hours. As soon as their parents left to run some errand Jenny's panties hit the floor and minutes later he was fucking her enthusiastically on the basement sofa.

Soon enough they were back to doing it at least once and usually more per day. Any chance to be alone their clothes would come off and he would be inside of her. He had never been with a girl so eager to be with him. There wasn't a moment all summer where she wasn't eager to make love at every opportunity.

Jenny still refused any suggestion of a condom. Telling her brother not to worry. He hoped that meant she had started some sort of protection, but he worried.

------

He finally realized there was a problem at the end of August.

"Jenny?"

"Yeah."

The two of them were in his bed. The rest of the family having gone to sleep.

"We've been doing this every day for almost five weeks now. I ummm have noticed." He asked nervously. "I noticed that you haven't had your period anytime in there."

"Of course not." She said with confidence.

"Why not? Jenny"

"Big bror, you've been shooting into my unprotected kitty twice a day for weeks. I'm preggers of course." She stated this with the calmness and certainty that she might announce that it was going to snow this winter.

Erik was anything but calm. "Fuck, Jenny, that's a big problem. I go back to California in a week."

"It's not a problem. It's a solution" Jenny was now rubbing her belly as she spoke. "I don't think you ever realized just how much I love you. You going to the other side of the world really left me feeling empty. You have to go again, but this time you have left me a gift. Inside of me there is a part of you that is now mine."

"You're going to keep it?" Erik was shocked.

"Of course."

"I will switch schools so I can stay home and take care of you."

"No, don't do that. That's not the point."

"The point?"

"I have my own project now. While you are off at school, I will be producing a beautiful baby. I didn't plan this, but once it happened I knew that it was what I was searching for. I can't keep you with me forever. That's not fair to you. Instead I will have our beautiful baby boy."

Erik was lost for words. Jenny seemed so certain of her plan. So happy with the decisions that she had made.

"You know it's a boy?" Was the only question Erik could think to ask.

"I'm sure of it. I'm going to name him Erik, after you."

------

A week later, Erik was waving goodbye to his family at the airport. His sister had told their parents the news. Not who the father was, but that she was pregnant. Everyone was concerned, but Jenny seemed happier than she had been in years. She showed no unhappiness as she waved her brother goodbye. Cupping her belly delighted by the gift her brother was leaving her with.