His Sister's Keeper
Copyright© 2026 by ghostwritten after dark
Chapter 12
Incest Sex Story: Chapter 12 - 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 Squirting Water Sports
“How are you doing... really?” asked Joey.
Gwen screamed internally, it felt like he’d asked that for the hundredth time that morning. He asked it all the way home from the pond, all night, and numerous times since they’d woken up. She always gave the same answer. “I’m fine.”
What did he want her to say? She’d gotten her ass raped hard and then pissed on right after. The rest of the day was a rotation of dicks getting stuffed in different holes, fucking her, and cumming somewhere in or on her body. No one else pissed on her, which was strangely comforting; it was surprising what she’d accepted as normal now. She was only forced to eat out Rachel once, while Rachel had to eat cum from her pussy and ass twice.
Todd hadn’t allowed Renny to be as rough the next times either, saying she’d been punished enough for the day. Gwen knew she’d made a deal with the devil, not knowing what, when, or how he’d call in his marker. The thing was, it still seemed like the best option she had, and he was living up to his end of the bargain; she feared she’d have to live up to hers and what more might be required of her.
She felt her pussy tingle, a slow moistening in her hairy crotch, at the thought of what deviant thing Todd might make her do. There was the fear that came from those thoughts, most of it from the unknown. Yet another worry was a fear she was starting to enjoy not knowing. She was finding herself getting more turned on by the loss of control; the subjugation of her will; and the relinquishing of her autonomy. That’s what really frightened her under the surface.
She could tell Joey anything, she always could. He was the first one she told when she got her first period, even before their mother. She’d already been given ‘the talk’ and had supplies ready, but she raced to his room to tell him right away. After what they’d been through so far, what he’d been forced to watch her do repeatedly; she didn’t want to tell him Todd was slowly changing her, corrupting her. She just needed to make it through the summer and get home. She could deal with it all then.
“Gwen, why aren’t you talking to me?”
In that moment, laying together in bed, Gwen snapped.
“What do you want me to say, Joey?” she said angrily. “It sucks. You know it sucks. Me saying it sucks over and over doesn’t stop it from sucking any less.”
Joey hung his head; he didn’t mean to push her so hard. She always talked about him being her rock; her secure point; but it was difficult for him to do if she suppressed everything. He wanted to do more to help; he wished he would have fought them right at the start of this whole thing. Now Todd had more control than ever over both of them. The original video that started all this was nothing compared to all the shit they had now. It would destroy Gwen’s life forever if any of it got out.
His mind flashed to the parade of guys, one after another, taking their turns fucking and typically cumming inside his bound sister. He hadn’t been able to scrub it from his brain since it happened. He could still hear the mocking laughs, the grunts and groans, and the perverse pleasure they all took fucking her. And he watched it ... he watched each and every single one of them defile her. He saw thick and thin globs of cum leak from her overworked pussy, drip down her labia, and pool by her ass until the next guy took over. And Joey watched it all ... with a hard-on.
“I’m sorry.” Joey put his arms around his sister, who sat upright in bed, his hands resting underneath the swells of her breasts. “You told me to keep you close and not let you go; to anchor you through this. I guess I’m not very good at it.”
Putting her hands on his, she leaned back onto him. The feel of his warm naked skin on hers did make her feel better. Maybe it was the contact, maybe it was the familiarity, she didn’t know. She just knew she needed him to not ask too many questions.
“You’re fine, Joey. Look, you don’t want to know what it’s like, ok? You don’t want me to paint you a picture of Renny raping my ass that hard. You saw it with your own eyes; you don’t need my perspective. Sometimes I just need you to be here for me but not ask questions. Ok?”
“I just want you to know you can still tell me anything, that’s all.” Joey paused, his hands crept up Gwen’s tits, tickling the sides as he went. “Like what’s it like to be pissed on?”
Gwen giggled and spun around to face him; her eyes flared with mischievous fury. “That’s a question!” she grinned playfully. Reached down under the covers, she gripped his hard cock in her hand and squeezed. “ ... and what did I say about questions?”
Joey clenched his jaw, his arms and legs retracted to protect his groin as his sister’s grip held firm. “I yield; I yield ... uncle!” Joey cried out till Gwen released his swollen member, laughing to herself.
“Any more questions?” she said triumphantly. She did like getting the best of her brother, friendly sibling rivalry and all. She realized she had a new tool at her disposal, which brightened her day.
Looking at his gorgeous sister, in spite of their nudity and sexual touches, it was almost like being back home. The two of them hanging out, goofing off, and getting on each other’s nerves in a loving sort of way. With that, he knew he couldn’t let her have the win here.
“Just one,” he said bravely, his hands ready to protect himself. “ ... what’s it like to be pissed on?”
Gwen’s eyes narrowed, her lips sucked into her mouth. She leapt onto her brother, hands fighting him to grab and squeeze any tender flesh she could get her fingers on. Both were squealing and laughing, bedding went flying, and the trash talk flowed freely.
“I’m going to squeeze it off!” Gwen fought.
Joey laughed, “Not if you can’t get it.”
“Yeah, there’s not much to get.”
“Bitch.”
“Dick.”
“Slut.”
“FINE! I’ll piss on your face, so you find out yourself.”
Joey suddenly stopped struggling, which caught Gwen off-guard and off balance. She’d put most of her weight on her right arm, which he’d been using to fight her off. He lowered it instead and she fell on top of him, smacking her nose on his shoulder.
“What?” Gwen asked, worried she’d accidentally hurt him.
“Would you actually?” he asked cryptically.
Gwen had no idea what he was talking about, the words lost in the moment of the fight. “ ... actually what?”
“Would you actually piss on me?” he clarified.
Gwen thought he was joking at first but saw the look in his eye that made her start to doubt it. “Are ... are you serious? It’s gross, Joey.”
He shrugged, “I just want to know what you’re going through.”
“Do you want to be fucked in the ass too?” asked Gwen sarcastically.
“I’m serious, just once ... I just want to know.”
Not knowing what to say, Gwen agreed. “Ok, one time. You’re getting weird, Joey. I do it because I’m forced to; you’re doing this because you want to.”
The two headed to the bathroom, neither one said very much. There was an uncomfortable energy between the two as Joey stepped into the tub and Gwen followed suit. Gwen reached over to start the water but then stopped, her hand resting on the tap.
“What is it?” asked Joey, lowering himself onto his knees in front of his sister. His vision moved from her face to her tits, and down to her hair slit. He was already stiff.
“Are you sure you really want to do this?” she asked again.
“I’ve pissed on you, it only makes sense for you to do it back, doesn’t it? I want to know what it’s like for you.”
“What it’s like for me...” Gwen paused, pulling her hand away from the tap. “ ... it’s humiliating and disgusting, Joey. It isn’t a game I’m choosing to play.”
“I know, I didn’t mean it like that. Look, turn the water on and we can get it over with; I won’t ask for it again.”
“No.” Gwen said pointedly. “You want this? You want to know what it’s really like? There’s no clean water running down my face when it happens. There’s just the hot, stinky, smell of piss all over me. I have to breathe through my nose, or it gets into my mouth.”
She shoved her brother over, knocking him onto his back; nearly cracking his skull on the edge of the tub. Towering over him, face stone cold, a look Joey hadn’t seen since he’d accidentally broke one of her toys. Stepping over him, her legs on either side of his head, she bent her knees and used her hands to spread her hairy folds open.
Joey could see the pink interior glistening, her inner lips stretched too revealing the feminine entrance he enjoyed and had watched many others use too. It was still remarkable to him, the female sex, which had only grown with repeated access. There were a few drips and then a sudden rush of hot liquid shot out of where he was looking. It landed directly on his face, some on his eyes and lips. He instinctively closed them, feeling and smelling the fluid covering his face. It was repulsive and disgusting, and despite his best efforts, some entered his mouth. The taste was bitter, salty and kind of acrid. The stream didn’t last long though, and soon it was merely a few drips.
“Is that what you wanted? Are you happy now?” Gwen said angrily.
Joey wiped his eyes as clean as he could, the smell was still strong in his nostrils though. It was still everywhere on him, settling in all the tiny cracks and crevices of his face and absorbing into his hair. The first thing he saw was his sister still above him, her hands still holding herself open, though the only thing leaking was her eyes. Tears ran down her face and fell from her chin.
“Gwen, I’m so sorry...” Joey said standing up. He hugged her and she didn’t recoil, in spite of what was all over him.
“This is me now, Joey. Do you feel like me now? Only I don’t get to stop it when I want.” Gwen sobbed.
“I didn’t mean to ... I just ... I don’t know.” Joey apologized profusely.
Gwen held her brother, her own piss on her skin. “It’s changing us, Joey,” she said cryptically. “They’re changing us...”
“I know,” he admitted. “We have to keep fighting though, together.”
“We aren’t even halfway through yet. What will be left of us when this is over?”
“Us, Gwen.” Joey put a finger under his sister’s chin and had her look at him, “There will still be us, in some form; but this, you and me, they can never destroy that.”
They kissed, mouths open, each tasting the foul waste in each other’s mouths. It didn’t stop them. They loved each other no matter what. Gwen felt a little better when their lips parted.
“You taste like piss.” She said with a chuckle.
“So do you,” Joey replied, laughing as well. “Maybe we should take a shower, I think we’re close by.”
“I think so,” Gwen once again reached for the tap, adding just before the water fell, “then I want you to take me. Make love to me before I’m ravaged again today.”
“Always.”
The pair arrived at the beach to try to find a nice place to set up, forgoing the pond. Gwen assured Joey they would be ok, that Todd said he’d talk to Renny, and she would be safe from any extraordinary punishments. This only raised Joey’s suspicions; he didn’t understand why Todd would go out of his way to do something for either of them unless there was something in it for him. Joey still suspected Gwen was hiding something from the day before, and that thought only grew louder in his mind.
“What’s a good place?” Gwen asked, checking out a few available parcels of sand without people.
“I don’t know, how about over there?” Joey pointed near a patch of trees; it would give them some shade while also having some sun to tan.
“Great, good choice.”
Gwen smiled and they started to set up, laying out towels on the sand. Every time Gwen bent over in front of him, Joey’s eyes locked onto her tits, barely encased in her pink bikini top. She slipped off her skirt, showing off her perfect legs and the gap between her thighs, he’d been inside just this morning. He had to sit up to hide the erection that began tenting up his swim shorts.
Gwen noticed and grinned to herself. She knew guys got hard and were horny all the time but seeing it as often as she did now and experiencing it first-hand was something else. It felt good to be desired, to be thought of as sexy, and wanted for her body; even if she didn’t always like the results. From her brother though, especially after just having ridden him hard that same morning and still getting him turned on felt good for her confidence.
Gwen leaned over intentionally, showing him more, then whispered, “Do you want to take me into the woods soon?”
Joey grinned, “Maybe. Let’s wait to see if Todd or someone else comes first though.”
“Why?”
“Well...” Joey had thought this through. “ ... you said I should get on Todd’s good side, right? So maybe I should take you more often with them around. Let them see us doing it together; show them I’m taking charge and getting what I want.”
Gwen smiled and nodded, “That’s a good idea; become one of the boys. Do you think it’ll work?”
“Not if he’s talking so loudly.” Todd’s voice came from the trees beside them. He walked out, a smirk on his face, clearly content with himself.
“Todd I-” Joey tried to defend himself, but Todd waved for him to stop.
Todd walked over and knelt before both of them. “It’s fine; Gwen’s progress is coming along nicely. You Joe, well, you’re a bit of a disappointment; I’ll be honest. I had higher hopes for you, but the main thing is you are taking her and using her as she was created for, that’s a start ... a slow one, but it’s something.”
Joey was both worried and confused, what did he mean Gwen was coming along nicely? His sister was doing what she was told, but by all accounts, and her reaction that morning, it seemed like she was miserable. She did like sleeping with him, which he certainly enjoyed immensely, but she wasn’t willingly doing it with the others. She was still under their thumb and forced to obey.
“Do you want me to go into the woods?” asked Gwen, already starting to stand up.
Todd grinned at Joey. “Whadda say, Joe? Want to show me you’re one of the boys?”
At a loss for words, Joey could only point toward the trees. Todd smiled, “I guess that’s a yes. We have time; pack up, you’re not coming back for a while.”
Joey and Gwen looked at each other, uneasy about the ominous sounding threat. It could be they were being moved to the pond for more rough hijinks at Gwen’s expense, or it could be some new torment Todd had cooked up. Either way, they gathered their towels and collected their gear, packed it into Joey’s bag and then followed Todd into the woods.
They walked for a few minutes, the laughter and noise of the beach faded away amongst the stillness of the trees. When Todd stopped, the Tanners stopped. Todd motioned for them to put down their bags, and Gwen knew she was on order. She glanced at Joey and readied herself for whatever was about to come next.
SNAP! Todd snapped his fingers. “Strip!” he commanded.
Gwen obeyed. Her bikini top was first to go, reaching behind her neck and pulling on the knot. It fell around her chest first, then onto the ground. Next was her bottoms, having not bothered to put her skirt back on. She hooked her thumbs into the sides and pushed them down her legs, falling to the ground at her feet. She kicked them off toward her top and stood naked and ready for the next command.
Todd walked around her, his hand touching her bare skin. “Very good. Isn’t it easier doing what you’re told? Not fighting your own internal nature to obey.”
Gwen didn’t know if she was supposed to answer or not, knowing not to speak out of turn, so she stayed silent. She felt Todd’s hand run over her chest, over her back and down to her stomach as he circled her. She once again felt like a shark was circling her, waiting to strike ... or just seeing how she’d react. She did her best not to move; she hadn’t been told to.
His fingers found their way into her bush, pushing through the thick brown curly hair and into her slit. Gwen groaned and tensed up, unsure if she was going to receive pleasure or pain from whatever he might do. In some cases, she found she got both, which confused her too much to think about. This time though, he simply slid his finger through from front to back. When he touched her asshole, she felt little sparks before he pulled his finger away again.
“Open.” Todd commanded, and brought his digit up to Gwen’s mouth. She understood and parted her lips, his finger slipping inside as she closed her mouth around it. She sucked and licked his index finger until he pulled it out again.
“Good. Very good. It doesn’t take much to get you ready now, does it?”
Joey thought he could hear a sense of pride in Todd’s voice as he spoke to his sister. Like she was a trained animal getting ready for a show or something. If his dick wasn’t so hard watching, Joey would have been more concerned, but the sight of Gwen stripped naked and being toyed with turned him on too much.
“Joe. Come here.” Todd said, looking in Joey’s direction. He knew had no choice, and the consequences could be transferred to his sister, so Joey obeyed.
“Yes Todd.”
“You want to be one of the boys, right? I want you to take command, right now.” Todd said firmly.
“But—but how?”
“Haven’t you been paying attention?” groaned Todd with mounting annoyance. “Snap your fingers and give a clear and direct command. Be the Alpha. Women only respect control when you take it from them. Now take command of your sister.”
Joey raised his hand tentatively, like he might be struck down by God himself for blasphemy. He struck his thumb and middle finger together but barely made a sound. “Gwen suck.” His words had no force or power behind them, falling like a limp noodle.
“Jesus Joe, I just ... can’t with you.” Todd held his own head in his hand, embarrassed at what he’d just witnessed. “How can you call yourself a man with what I just saw? Are you sure you weren’t born a girl and had a dick taped onto you? Do you like dick, is that it? If you do, I can get Renny to bottom you out.”
Even Gwen couldn’t help but chuckle at Joey’s terrible attempt at being dominant, though she did her best to hide it. She knew her brother was never good at standing up for himself, usually deferring to comedy or compromise to defuse a tense situation. His nervousness and lack of confidence was one of the reasons he stayed a virgin for as long as he did. He was pushy instead of confident. It made him look desperate, which led most girls to get annoyed and dump him.
SNAP! Todd snapped again. “Bitch. Hands and knees.”
Gwen dropped to the ground; the palms of her hands dug into the dirt and her knees were on some dead leaves. She waited in position for the next command; seeing Todd pull down his shorts, she knew to expect to be used soon. It excited her.
“See Joe. Have confidence and they obey. If you’re weak and pathetic...” Todd moved behind Gwen, lined his cock up with her entrance, and shoved in. “ ... someone else will come and take what’s yours. It’s survival of the fittest. The one who gets to spread their seed is the one strong enough to bend people to their will. Isn’t that right, little sis?”
SMACK!
A hand slapped hard against Gwen’s ass, making her cry out as Todd has plunged in and out of her. It felt good, she hated herself for it, but she liked it. Her head was down, looking at the dirt beneath her, as she began panting like a dog in heat. Fingers moved up her spine, slowly creeping like a spider, climbing up her vertebrae. It both tickled and tormented her, unable to move her hands to scratch the itch. When they reached a lock of her hair, they spun around and pulled it tight.
Todd started again, “She likes being taken, Joe. Don’t you toy? SPEAK!”
“Yes Todd.” Gwen’s voice was quiet, ashamed. She didn’t look at her brother.
SMACK!
Todd’s hand collided with Gwen’s ass again; a pinkish hue developed from the two strikes. At the same time, he yanked back on Gwen’s hair, pulling her head back and making her look at her brother. Her eyes were glassy, pupils dilated, and her mouth hung open breathing heavily.
“See that look in your sister’s eyes, Joe? That’s the look of a whore, a real whore ... she loves this, loves being commanded. She’s already creaming on my cock, and you wanna know why?” Todd paused for dramatic effect, the sound of his sloppy strokes and Gwen’s breathing were the only sounds beyond the rustling of leaves.
Todd flashed his teeth in a crooked smile, “ ... because I don’t care if she gets off. I’m projecting my will, my need to breed, into her and she’s responding to it naturally. She instinctively knows I’m a prime candidate to give her the best genetic material, so she makes herself get off to help facilitate that.”
Joey looked at his sister, her eyes rolling back in her head as her hips bounced with each thrust of Todd’s cock, she didn’t look upset. Watching her get fucked was such a turn on, her tits swaying to the natural rhythm of their motions, he wanted next. His eyes moved back to see Todd’s wicked grin once again.
“You like seeing this, don’t you?” Todd sneered. “You want to be in control and take charge of her like I am. I can feel it as sure as I can feel her tight pussy wrapped around my cock. If you actually listen to me, really listen to me, she’ll be yours and so will any girl you want. Take command!”
Joey watched and thoughts lost in Todd’s words, ravaging lust building inside, his dick aching to join the fray. Gwen looked so hot, lost in ecstasy, and he didn’t want to wait his turn. She was HIS sister after all.