His Sister's Keeper - Cover

His Sister's Keeper

Copyright© 2026 by ghostwritten after dark

Chapter 1

Incest Sex Story: Chapter 1 - Joey and Gwen Tanner, two close and loving siblings, are excited when they arrive for a six week summer vacation near a small lake. One lapse in judgement though, could turn their whole world upside down. To make it through the summer, they'll have to do things they never imagined. Can their bond overcome the challenges ahead, or will they be warped and manipulated into something they never expected.

Caution: This Incest Sex Story contains strong sexual content, including mt/ft   ft/ft   Teenagers   Blackmail   Coercion   Drunk/Drugged   NonConsensual   Heterosexual   Fiction   Incest   Brother   Sister   BDSM   Humiliation   Light Bond   Rough   Spanking   Gang Bang   Group Sex   Anal Sex   Analingus   Cream Pie   Double Penetration   First   Facial   Oral Sex   Petting   Water Sports  

“Here we are, kids. Look at this place, I told you it was beautiful.”

Joey and Gwen’s Dad, Chase, had been talking up this lake house property since booking it in January. He’d shown them photo after photo of the area to the point they were sick of it all. It was a moderately sized, two-story Victorian-style home in a bustling little vacation community. As they pulled into the driveway, the kids were reluctantly impressed; not that they’d tell him that. Joey turned to his younger sister, separated by only a year, and rolled his eyes. She giggled and covered her mouth with the sleeve of her wind jacket.

Unlike most siblings, the Tanner kids had always been close. As they grew from small children and progressed into their teenage years, their parents expected them to drift apart, especially when Joey entered high school. That didn’t happen. The next year, when Gwen entered her freshman year, the two hung out even more, even forming a common friend group. Each was the other’s best friend, which made for a mostly peaceful household, although the occasional argument would occur from time to time. That closeness was the reason their parents decided to rent a house for the majority of the summer, six whole weeks. If they didn’t make friends in the town, they could keep each other company as they always did.

“Alright, everyone grab a few bags and unpack the car,” their Mom, Renee, said after stretching out her back, sore from the four-hour drive.

Each of the four members of the Tanner clan loaded themselves up with as much as they could reasonably carry. They walked up the stone slab path from the gravel driveway and climbed the three stairs to the front porch. Chase, his hands overloaded, fiddled with the key box left by the rental’s owners. He dug through his pocket to find the code he’d written down, then mis-clicked the number once or twice.

“Any time now, Dad!” Gwen groaned as she started to lose her grip on the bags she held in her hands.

“Sorry, sorry ... almost there and ... got it,” he said triumphantly as the little black box opened up.

With the door unlocked, they piled in through the front door and immediately dropped whatever they were carrying in the main entranceway. There was a mad rush to use the two available bathrooms, with one on the main floor and the other on the second as part of an ensuite with the master bedroom. Joey and his Dad waited their turns while the women of the family got first dibs. Once their needs were met, they all started looking around.

“Oh Wow,” said Gwen as she started to explore their temporary new home. “Joey, have you seen this back deck?”

Her brother arrived, and they both gawked at the large wooden deck, which held a BBQ and hot tub, and looked out on the lake just twenty yards away. It was actually bigger and better than the pictures had made it appear. There was even a small dock with a shed that held a canoe and a few kayaks for paddling around.

“Is that a beach over there, Dad?” asked Joey, pointing to a small brown strip on the far side of the lake.

“Yup!” Chase said proudly. “That’s the public beach for local residents. The town is a little way beyond that. Admit it, your old man did good with this.” They both grumbled their approval simultaneously, not wanting to let on that they were both excited about spending most of their summer here.

They had to do a few more runs to unload the rest of the SUV. It was mostly clothes, some food, and various other personal items they’d brought with them. When they were done, it was already late in the afternoon, and they still had to unpack and set up their rooms.

Their parents’ bedroom was on the second-floor landing. The smaller bedrooms, for Gwen and Joey, were on the first floor, off the kitchen at the end of a hallway. They were on either side with the bathroom sitting in the middle. There was a brief debate on who should get what bedroom, as one faced south, toward the lake, while the other faced north toward the road. After a quick game of rock, paper, scissors, Gwen happily unpacked her bags with the windows open towards the water.

The house came fully furnished, including cookware and linens. While the master bedroom had a California king-sized bed, the smaller bedrooms each contained double beds, a dresser, closet, mirror, and a small writing desk. The décor was sparse and simple. The walls were flat white with wood trim, with a few generic nature pictures to break up the larger walls.

That first day flew by, and before they knew it, night had descended. Both teens suggested they fire up the hot tub for a late-night dip, but their father hadn’t had a chance to go over the instructions yet. Instead, the family sat out on the back deck, looking at the stars. It would have been nicer simmering in their bathing suits, but it was still a good way to end the day.

“We don’t get to see this in the city,” their father said while trying to identify some constellations.

Joey was a little less enthused, “This is nice, but I hope there’s a bit more to do around here.”

“We’ll check out the town and beach tomorrow,” Gwen said while sipping a soda.

“You two can wander around all you want. Just stay safe, ok?” Renee added.

“Yes, Mom,” the siblings replied sarcastically. They were in the middle of nowhere with only a small town and vacation cottages, what kind of trouble could they get into.

Gwen’s night ended as it normally did at home, hanging out in her brother’s room. The two would normally talk until one of them got tired enough to sleep. Despite the long day, neither really felt tired yet.

“I hope there’s more to do than just paddle around the lake,” said Joey as he lay on his bed staring up at the ceiling.

“I’m sure there is. Maybe there’s a few people our age around to hang out with,” Gwen replied.

Joey hadn’t thought of that, “Oh, yeah. That would be cool. Maybe a few parties on the beach, break out that hot tub...”

Gwen laughed, “Of course, thinking about meeting girls, aren’t you?”

“No...” well, maybe. We’re here for six weeks. Maybe we could have summer flings.”

“What’s this we business?” replied Gwen. “Unlike you, I’m quite happy maintaining my virtue, thank you very much.”

Gwen said it jokingly, but she was growing more concerned with her brother’s quest to lose his virginity. It was something he’d become more and more obsessed with, to the point of it ruining one of their friendships with a girl. She really didn’t want to have to watch him struggle and mope around every time he got rejected. She loved her brother a lot, but this was one part that was a black mark against him.

“Come on, Gwen,” Joey argued. “Don’t you want to know what it’s like to do it? It doesn’t intrigue you at all?”

“Maybe a little, but it’s different for girls than it is for guys,” Gwen countered. “You get laid and you’re heroes. I get laid and I’m a slut or a number someone gets to wave around. I just don’t feel like dealing with that for a short-term fling.”

“But no one knows you here, Gwen. You have a free pass to do whatever you want. We could be different people from our normal selves.”

Gwen rolled her eyes, “Do I still have to be your sister?”

“Har har! I’m serious, though. Think about it. Haven’t you ever wanted to change your personality, be a bit more daring or risk-taking?”

“Not especially, I like me and I like you being you. You shouldn’t have to put up a front to meet girls, Joey. Find the right girl by being the wonderful you, you normally are and have a relationship ... let things progress from there naturally.”

“I tried that with Tammy Maroni, and it didn’t work out. Girls want a bad boy, not some nice guy. Everyone knows that.”

“You went on three dates with Tammy and wouldn’t stop asking her for sex, Joey. That’s why she won’t talk to either of us now, since you dragged me into it, too. I’ve tried to warn you; you’re becoming your own worst enemy with girls. Real you or fake you, if you can’t control yourself, you’ll keep failing. Just be you, and lay off the pressure. It comes across as desperation.”

Joey sat up, “But I am desperate, Gwen. Most of our friends have hooked up and we’re like the only two who haven’t. I thought Tammy was a guarantee, since she’d already done it. But it didn’t happen. I’m dying here, sis.”

“Again, I’m in no rush. If I find the right guy and we become serious, sure ... I’ll think about it. You can’t force these things and that’s what you’re doing. Let’s just relax and enjoy the summer. We have this awesome house and we will see what’s going on in town tomorrow. Try not to think about girls or your dick all the time and maybe you’ll have more fun.”

Joey grumbled, “Yeah, I guess.”

Gwen tried to lighten his spirits, “Hey, think on the bright side. You get to spend the whole summer with the coolest person you know, me!”

It worked and her brother grinned, “You’re such a brat.”

She innocently smiled at him. He knew this called for vengeance; he quickly reached over and started tickling her sides overtop of her large sleeping shirt. Her arms flailed, her legs kicked, and she tried to cover up the weak points he knew too well. She laughed while trying to fight him off. It was one of their little games they played since they were little, even after they both grew old enough to know they were probably too old for it. To them, it was still fun and innocent.


The next morning the siblings got themselves ready to spend the day exploring the town and surrounding area. After a quick breakfast and then showers, they started packing a bag for their day out. Neither was too sure what they’d need, so they grabbed some snacks, drinks, towels, and various other odds and ends they might need. I think we should wear our bathing suits,” Joey suggested at one point. “If the town is dull, we can at least hang out at the beach most of the day.”

Gwen agreed, “Good idea! I’ve been looking forward to trying out my new one anyway. I think I look pretty good in it.”

They each retreated into their rooms to slip on their beachwear. Joey put on his swim shorts and T-shirt, while Gwen put on her new bathing suit she’d shopped for with her Mom before they left home. When she opened her bedroom door, it was the first time her brother had seen her in it.

“Where’s the rest of it?” a shocked Joey said as he stared at his sister’s body.

Gwen grinned, “You like? I thought this summer I’d ditch the one-pieces and switch to a bikini.”

Gwen did a little twirl so her brother could see the whole thing. It wasn’t as revealing as other suits her friends had, but it was more daring than she usually wore. It was hot-pink with thin shoulder straps that tied up in the back. It showed off some cleavage from her moderately sized breasts, but ‘wasn’t giving away the goods’, as her Mom said. The bottoms were tied together on the sides and hugged tight against her privates and ass. It wasn’t a thong, nor did it show a lot of her rear, but just enough to get a good tan. She tossed on a pair of shorts and she was ready to head out.

In Joey’s eyes though, he could see a lot more of his sister than he ever wanted to. He always knew his sister was attractive, a number of their shared male friends made comments to him about it enough times. Most of the time he told them she wasn’t interested, as he knew the guys she did like already. Even then, she would only go out with them once or twice before things stopped. Either she lost interest or they’d get annoyed because they couldn’t get anywhere with her. But seeing her there in that bikini reminded him that she is a girl after all, and he took stock.

She isn’t short or tall, but stands at a reasonable 5’6”. Good, for a girl. Gwen’s long auburn hair is tied back in a ponytail with a pink scrunchie. She has pale skin and a thin frame which seems to magnify the size of her breasts cradled within that pink top. Her stomach is flat and toned from years of playing soccer for various school teams. The only reason she fought against going on this trip was missing a summer of playing, but their parents talked her into it. When she twirled to show herself off, despite not seeing the bikini bottoms underneath, her jean shorts seemed particularly short, even though he’d seen her in them for years now.

“I take it by your awkward silence that you approve,” said Gwen, breaking the silence.

Joey tried to compose himself, “I thought you said you didn’t want to meet anyone this summer?”

“I don’t,” she replied before sporting a wicked grin, “doesn’t mean I can’t look good though. Come on, pervert.”

She gave him a smack in the stomach with the back of her hand before heading to the door. Joey, carrying the bag and still a little stunned, followed slowly behind. Their parents were in the kitchen cleaning up and sorting through a few things and stopped them before they left.

“Where are you two off to?” Renee asked.

“Town and then the beach,” Gwen replied as she slipped on her shoes.

“Ok, don’t be gone too long. Dinner’s at 5:30 and we’re having BBQ’d ribs,” their Dad said after taking an unfortunate look at his daughter’s attire and guiltily returning to putting stuff away.

“Hey Dad, don’t forget to figure out that hot tub. It’d be nice to take a dip tonight,” added Joey.

“Will do. Have fun, kids.”

The two headed out the back door and walked along the bank of the lake. The sun was high above them with few clouds in the bright blue sky. As they walked along, there were no fences or signs keeping them from going one way or another. There even were a few people who waved and said hello as they passed. It was a marked and noticeable difference to living in the city. As they approached the beach, they could see and hear music, laughter, and all the usual sounds of splashing and swimming.

The beach wasn’t large, probably a couple of hundred yards, but there was a decent amount of free space still available. The sand was light brown and fell into their shoes quickly as they walked on it. There was a designated swimming area, roped off with a blue and white rope and floats. Several smaller kids were splashing around in the water as their parents and a lifeguard watched from the shore. Meanwhile, others were laying on towels catching some sun or on chairs reading in the shade of the umbrellas.

Gwen asked her brother, “Should we hang out here or check out the town first?”

“Let’s check out the town first. Then we aren’t covered in sand as we walk around.”

“True enough. I think there’s a path there,” Gwen pointed to a sign leading through some trees.

The pair walked along the longer than expected wooded path until they found themselves stepping out to a parking lot. The bustle of cars a little further away led them to the main road, which offered little clothing shops, stores, rental places, a few restaurants and coffee shops. A small little suburb of houses sat beyond all of that. It was where most of the locals lived who ran the shops and stores or just liked to call the quiet corner their home.

“Cute!” Gwen squealed as they walked along the main drive looking at some of the shirts and stuff on display.

“Leave it to you to go shopping while on vacation,” Joey teased. “Wanna grab a drink at that coffee place?”

“Sure, if you’re buying...” smiled Gwen.

 
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