His Sister's Keeper
Copyright© 2026 by ghostwritten after dark
Chapter 11
Incest Sex Story: Chapter 11 - 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
“I don’t want to go out there today,” said Gwen, laying on her side, her arm underneath Joey’s head. She clutched him tight, he could feel her hard nipples poking into his side. He was trying to comfort her, as he usually did each morning, but today was different.
“You can hide inside today, but he’s going to be waiting tomorrow. You know Renny’s not going to go easy on you.” Joey replied.
He hated this, he hated watching his sister suffer like this. She’d physically recovered from the July 4th gangbang with no lingering pain. The past three days, he had to watch Todd and Cas take turns using Gwen whenever they wanted, including her now available ass. That part wasn’t that bad; she was kind of getting used to it. Joey even fleetingly wondered if she was secretly enjoying it.
But it was Renny, glaring from the sidelines, dick in hand or in Rachel. His eyes glowered with rage and hatred, banned from laying a hand on Gwen’s sexy body for three days per Todd’s punishment. The kicker, Gwen being told to piss on his face, the ultimate humiliation. It wasn’t her decision, she’d been given a command by Todd, but she knew she’d bear the brunt of the reprisal, and that day was today.
“What do you think he’s going to do to me?” Gwen asked, the fear noticeable in her voice.
Joey didn’t know what to say. He’d seen her forced to do some horrendous things already, he didn’t want to make things worse in the moments of peace they had together. Their bedrooms had become safe spaces, where they showed their care and love for one another. Sure, it was sex, which he did enjoy, but it helped Gwen deal with the stress and misery of each day. Joey felt guilty enjoying their nightly, and sometimes morning fuck sessions. In the dark recesses of his mind, the one he couldn’t tell Gwen about, he hoped they’d never end.
“I don’t know, Gwen.” He replied, pulling her in even tighter. “Best not to think about something you can’t control.”
Gwen shifted her legs, pressing her furry crotch against his leg. It caused something Joey couldn’t control, as his erection grew underneath the thin sheet. He thought about hiding it, rolling over on his side so his sister couldn’t see it; but part of him wanted her to see. It was like Todd’s voice was in his ear, telling him he should use her to relieve the pressure. It made him feel even worse, but he didn’t move or shift in any way.
“But I want to be ready, you know? If I can anticipate it, maybe I can mentally prepare myself ... like we did with the butt sex.”
Gwen’s words made Joey’s dick twitch, increasing the blood flow to his nethers at a rapid pace. He could almost feel the tightness and the heat from his sister’s exquisite ass wrapped around his shaft. The guilt increased with the stiffness of his prick, making it doubly difficult to concentrate. It caused him not to blunt his words when he said what he was thinking.
“He’s going to fuck your ass, Gwen, hard. You know that.” Joey blurted out insensitively, regretting it almost immediately. She looked away toward the curtained window and a small stream of morning light poking though. Her hands clenched and unclenched like she was squeezing an invisible ball.
“I’m- I’m sorry, I shouldn’t have said...” Joey’s words faded, he felt terrible.
“I know,” Gwen whispered softly. “ ... for both.”
They lay in silence, only the sound of a few birds outside broke through, though it felt like hearing a different world. It was detached and hollow, like they were trapped in a glass jar they couldn’t escape. The air in the room was stale, the scent of sweat lingered in the air both from the early heat and the previous night’s activities.
“I know it’s going to be bad; Todd is controlling and crazy, but Renny ... he’s sadistic,” Gwen lamented. “I want to be ready.”
“You will be, you’re so strong,” he was trying to support her. “I can’t believe how well you’ve dealt with all this. I don’t think I could take what you’ve been put through.”
Gwen added, “ ... so far. I’ve managed it so far; but today’s going to be rough.”
Joey had a strange thought, it seemed crazy at first, but it made some sense to him. “Maybe we should find Todd,” Joey suggested.
It caught Gwen by surprise. “What? Why?”
“I don’t know...” Joey tried to put his logic into words. “Maybe ... well, maybe with Todd around, Renny will go easier on you.”
“Doubtful.” Gwen said sharply but then let it marinate in her mind. What did she have to lose, if it was going to happen anyway. The off-chance Todd might step in if Renny went too far was better than nothing at all. Todd was the only one Renny was scared of and the only person who could keep him in check.
“Alright...” Gwen said after a few moments. “How would we go about finding Todd?”
Joey’s eyes snapped to his sister’s in disbelief, “Are you serious? I was only spit-balling, I hadn’t fully-”
Gwen put her lips to his to silence him, the kiss lingered just long enough to calm them both down. Joey felt a tingle in his groin again; he couldn’t believe the effect his sister now had on him.
“It’s a good plan or at least the best we’ve got...” said Gwen after her lips left his. “ ... Enemy of our enemy or some bullshit.”
Joey did see one flaw in this strategy though and had to call it out. “With Renny though, it’s one person; a sadistic person, but just one. With Todd and probably Cas too, aren’t you worried about adding two more dicks to fuck you?”
Gwen shook her head with striking confidence, “After everything I’ve done so far, especially restrained at that fucking party, I know I can handle it. Besides, the last few days Todd and Cas weren’t that bad.”
It was true, Todd and Cas would get what they wanted from Gwen, but it was never malicious. They would do the usual taking her aside into the woods, bend her up against a tree or on her knees, and get themselves off however they wanted. When they were done, they’d simply clean up and walk away till the next time they wanted more. All the while though, all could see Renny burning anger at Gwen and Joey alike.
“So, how do we do it?” asked Joey, his eyes wandering over his sister’s body.
Gwen grinned and rolled her eyes at her pervy brother, “First, you’re going to put that thing in me to calm down.” She said as she reached down and gripped his hard cock; stroking it in her soft palm.
“Second, I think we’ll call Rachel to see where Todd might be; she might know if he’s planning on doing anything specific today. Worst case, we head to the pond and let her know that’s where we’ll be ... to let Todd know too.”
Joey nodded, “Ok, sounds good. I’ll get my phone...”
“Wait!” Gwen reached out to stop him. “There’s a third thing ... you might not like it though.”
Joey looked at his sister with worry, he already didn’t like most of this. The fact that she was emphasizing something couldn’t mean anything good. He moved back to his original position with Gwen pressed up tightly against his side.
“What is it?” asked her concerned brother.
Gwen sighed, “You can’t ... you can’t try to protect me, like you did at the party.”
Joey tried to protest, “Gwen, but-”
She cut him off again. “I know you meant well, but it’s just going to make things worse for both of us. You’ll get punished like the chair thing and I’ll get equally punished by them doing even more horrible things to me.”
She paused trying not to think of what might be in store for her, a small cold chill ran down her spine and ended at her pussy. She felt a growing dampness between her legs and knew Joey would take care of it shortly. It was a worrying concern for a different day, she told herself.
She continued, “In the end, it didn’t solve anything or stop anything, did it?”
Joey bowed his head, “No. It didn’t.” He wished he had the power to stop this. To stop the mistreatment of his dear sister and to protect her from these creeps. He wished he could show her he wasn’t a weakling and could take care of her ... he wished ... his mind drifted off till Gwen snapped him back to reality.
“So, don’t do it, ok?” Gwen pleaded. “You’re my rock and I need you there with me when these bad things happen. I need you to talk me through it and you can’t do that strapped to a chair and muzzled. Maybe you can try to get in with them, be their friend, I don’t know ... I’m just rambling ... unless they are really going to hurt me, just let them do it, ok? Promise?”
Joey squirmed uncomfortably, he didn’t know if he could promise that. He was already dealing with a large amount of guilt for causing this whole situation in the first place. Add onto that, the shame of enjoying the perks of everything. Sure, a lot of it was gross and horrible, but there he was in bed again naked with his sister, likely to have sex with her very shortly. He’d watched so many guys fuck her the other night and his cock barely softened the entire time.
Through all that though, he could feel his anger growing inside him every time Gwen was stripped and forced to perform. At first, he thought it was just his feeling of wanting to protect Gwen, but over time, he felt a growing jealousy that she wasn’t just his. The two conflicting emotions and feelings, desires and depravities, swirled and fought in his head. He wanted his sister safe; he wanted her just for himself ... but a part of him couldn’t help enjoying the sight of her doing all these perverted things. He hated that this happened but enjoyed the results.
Gwen looked at him again, “Promise?” She said more forcefully.
“I promise...” Joey replied; his conflicted eyes unable to look at hers.
Gwen kissed his cheek. “Good.”
She slid her lips over to his and pressed them both together. Her tongue flicked out, asking for entrance to his mouth, which was quickly granted. The siblings made out, gently at first, but hands moved over bare flesh and pulses quickly increased. Gwen slid a leg over Joey’s waist till she was kneeling on either side of him. Her wet muff pressed against his lower stomach like a wet sponge till she lowered herself to meet his meat.
Pulling a hand off one of his sister’s delectable tits, Joey reached down between them to position himself at her opening. With gained skill, he swiftly found his target and slipped partially inside causing both Tanner siblings to moan into each others’ mouths. With one final kiss, Gwen sat up and pressed the whole cock inside her as she sat down upon it.
Joey looked up from his back at his sister grinding her pussy on his cock. Her hips gyrated and raised and lowered, pushing their pubic areas together. Between the two of them, it was difficult to see much going on down there. His eyes looked higher, to her tits jiggling with each thrust, nipples poking out with lustful excitement. As if drawn by magnets, his hands reached up and cupped both, thumbs stroking the hard little pink nubs on the ends. A groan moved his eyes up again, to see Gwen’s eyes closed, her face flush, and a small smile across her lips. God, she was the sexiest thing he’d ever seen, he thought to himself.
‘You can fuck her whenever you want’, a little voice said in his head. He knew it was that of Todd. It continued, ‘She’s your pet after I’m done with her’.
Instinctively, Joey stabbed upwards with his prick. Gwen’s eyes shot open and a loud moan escaped her lips. She looked down at him, her eyes wild, daring him to do it again. He complied and pushed up even harder.
“Fuck!” she blurted out, her pussy yearning for more.
“You like that?” asked Joey with a grin of his own, quickly repeating the motion without waiting for her response.
“Uh! Yesssss...” she groaned, bracing her hands on his chest to steady herself and she lifted herself up and slammed down onto his stiff prick. The bed began to squeak. Gwen was oblivious but Joey had enough sense to know they needed to keep it down.
He took his hands off her tits and placed them around her back, pulling her back down on top of him, her arms buckling instantly. Their mouths crashed into each other, tongues twisting together, as they breathed heavily. Gwen had been on the upstroke, giving Joey a few inches of room; which he took advantage of the space.
Slap ... Slap ... Slap! The wet sloppy sound of their sexes slamming together dulled the sound of the bedsprings. It was quieter than the metal creaking, but it would be unmistakable if anyone heard it outside of their little sphere of perceived safety. Both were now heading to the cliff’s edge as they muffled their groans with each other’s lips.
“Fuck me ... Joey...” Gwen mewed, her eyes closed tightly as waves of near painful pleasure rippled through her whole body, fingers to toes.
“You like this ... you want me to cum...” Joey grunted in her ear as he kissed her neck and cheek.
“Yea ... cum in me ... you can always cum in me...”
The words rang in his ears as his cock plunged deep and released his load inside of Gwen’s body. Sensing her brother’s release, Gwen followed suit and came on his cock. Her muscles flexed and released, milking more of the Tanner family recipe into her womb. She shuddered, hot and sweaty, before laying across her brother’s body; still impaled on his dick. Cum leaked out and fell where they joined but neither were in a hurry to move; they just wanted to bask in the little moment of joy. It was likely to be the only one for that day.
Showered and prepping to leave, the two siblings were hoping their plan would work. Joey had called Rachel and she suggested they all meet up at the pond. It was going to be a hot one that day, so Todd and the crew were less likely to be out recruiting and meeting people. She knew they usually avoided the busy beach when they didn’t need to be there, opting for the quieter comfort of the pond.
The group had expected Gwen and Joey to stay at the beach, as they often did, so Gwen wouldn’t have had to service them often if the Tanners stayed away. Gwen still chose the safest option. Todd’s protection was worth the cost of what he might want her to do.
Rachel’s words still were little comfort, “Be ready, it’s going to suck...”, she’d said. Rachel knew better than anyone, having been on the receiving end of Renny’s frustrations the past few days. Though, the sister of Todd agreed that it was the best option they had; and that Todd was more likely to put his foot down if he thought things were going too far. Not really for Gwen’s comfort or safety, but more to protect her as an asset for the rest of the summer. They could get another girl, but it would take effort and Gwen was locked in for several more weeks.
“Remember your promise...” Gwen said as she reached for the door handle.
“I know, I’ll try my best,” replied Joey, looking at his sexy sister once more and wishing they could spend the entire day in his bed.
Gwen released the handle, “No, don’t try. Do it. I need you to, ok? Also, feel free to take me at any point in the day; I could use the break from those three...” she flashed him a naughty smile. “ ... someone who knows what I like.”
His shorts twitched. “I will.”
The siblings made a beeline along the lake and past the beach, cutting through the woods without bothering with the trail. The two had become very familiar with the wooded area between the beach and the road, having had to venture inside numerous times at the behest of Todd, Cas, and Renny. They were as comfortable with the area as they were with their own neighborhood back home.
“You’re sure they’re going to be there?” Gwen asked as they marched down the road.
“That’s what Rachel said, as far as she knew,” Joey replied, sweat already rolling down his back.
“He’s not going to go easy on her,” Rachel tried to explain, knowing Renny all too well. “She shouldn’t expect Todd to do much; he’s never stepped in before with anyone else ... unless someone breaks one of his rules.”
Those words rang in both of their heads as they made the turn off the roadway and onto the hidden path. Joey was nervous for his sister once again, fearing what he might be forced to watch. The normal stuff, he’d gotten used to, even somewhat desensitized to; but this was different. Worse still, there was a certain sick anticipation growing inside him; a nauseous curiosity of what lay before them in the clearing.
For Gwen, she was doing her best to hide her fear; trying to put on a brave face for her brother. She didn’t want him to do anything to make things worse, like taking a swing at someone like last time. It wouldn’t do any good, the fists and fury wouldn’t fix this problem. They had to outlast it; they had to play along, and she needed Joey by her side for support.
Wiping beads of sweat from her damp hair, Gwen knew it was only another few minutes to the pond. She’d worn a short jean skirt overtop of her regular pink bikini and a white tank top over her chest. A small sweat line grew down her center, making her bikini top show through the thin material. She hoped she’d get to take a swim first, before the festivities began. She wanted to cool off, she wanted to not smell sweaty, and she wanted to hide the fact that her pussy was soaking wet.
“Whatever happens...” Gwen said as the trees parted.
Joey reluctantly agreed, “Whatever happens.”
They emerged from the trees, the sun beating down on them, to find Todd, Cas, and Renny drinking beers in the shade of a cluster of trees wearing swim trunks. Meanwhile Rachel lay on a towel completely naked in the sun tanning. All eyes turned to the siblings as they walked toward the group. Tossing their bags and towels on the grass, Gwen stripped off her top and skirt, standing in her pink bikini.
“You two never cease to amaze me,” Todd grinned. “I couldn’t believe it when Rachel told me you’d be coming here.”
“Hey Joe, want a beer?” Cas asked, pulling out a cold one from a big blue cooler.
“Nah, not right now,” Joey tried to decline respectfully. “I think we just want to jump in the water first; have a swim and cool off.”
“Yeah, that’s a good idea...” Todd’s grin twisted. “ ... if only...”
“If only what?” Gwen asked, knowing she’d likely not enjoy the answer.
“The pond isn’t free.” Todd’s eyes flashed menacingly as he spoke. “Costs a piece of clothing each.”
Gwen sighed, “Of course.”
“Why don’t you just take your top off and I’ll-” Joey suggested but Gwen shook her head no and he stopped.
“Let’s get this over with,” she said calmly. “You want me naked, right? So, you can do whatever? Fine.”
Without hesitation, Gwen tugged on the knot of her top, loosening it till it slipped free. She pulled her arms out from the shoulder straps and tossed the top on her towel. Then, she yanked quickly on the sides of her bottoms, falling to her feet where she kicked them toward her stuff. She stood naked, once again, before everyone; her bushy brown pubes damp and flattened out from confinement.
“Is this what you wanted to see?” she said, turning around to show off everything she had.
Renny sprung to his feet, his shorts showing exactly where his mind was, but Todd was quick to stop him. Casually, as he often appeared, Todd stood up, beer bottle in hand and approached Gwen. He stood nose to nose with her, the smell of beer on his breath let her know he wasn’t on his first.
“My my...” he chuckled, placing his hand on her thigh. “Eager, are we?”
Gwen shook her head, “No, I just know what’s in store for me today. No use in pretending.”
The look on Todd’s face was like a cat that ate the canary. He leaned in toward Gwen’s ear and whispered, low enough that even Joey couldn’t hear.
“You’re excited, aren’t you?” he said softly, his fingers pressed into her matted lower hair.
“Y-yes...” Gwen replied; her voice sounding like a light breeze.
“You know you walked into this today, right? You want this? Remember, don’t lie...” his words were both menacing and yet honest.
“ ... yes...” she said quietly. Gwen could feel two of Todd’s fingers slip inside her, making her knees weak. She had to put one hand on his shoulder to keep from falling over. He seemed to like that.
“Good. You’re getting the hang of this...” Todd’s thumb flicked over her clit; Gwen whimpered. Todd looked at Joey and then back to Gwen. “Did you fuck your brother today?”
“Ngh...” Gwen moaned, “ ... yes.”
“Good girl,” Todd stroked her hair. “I hope he put a load in you...”
Gwen could only nod, her eyes clamped shut. She couldn’t believe she was already nearing the edge of orgasm. She was panting hard, her legs felt like jelly. Todd was in full control of her body in every way possible, and she didn’t know how he’d managed it.
“Nice ... We’re all going to fuck you today, but you knew that already. No, you’re here for something else ... protection.” Todd bared his teeth into a wicked smile. “I know you love deals, so I’ll make you one, but it’ll cost you. You’ll owe me one, understand? Believe me, I intend to collect. Do you agree?”
Gwen twitched and shivered, her mind not thinking clearly. She wasn’t thinking of the possibilities of owing someone like Todd anything. She was too distracted with worry of what Renny might do and the fingers teasing her mercilessly. She wanted to relax, she wanted to enjoy her summer, and she desperately wanted to get off.
“I agree...” she mewed softly, with her knees buckling.
Todd gave her an ugly smile, “I’ll make sure Renny doesn’t play too rough ... Now go cool off.”
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