His Sister's Keeper
Copyright© 2026 by ghostwritten after dark
Chapter 10
Incest Sex Story: Chapter 10 - 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
Gwen opened her eyes, and much like the rest of her, they were sore. The bedroom looked weird at first, as she slowly woke up and her eyes adjusted to the dim light. Then she recognized it as her own. She’d been sleeping in Joey’s room almost every night since this whole nightmare began, so it felt strange to be in her own room. As she rolled over, a sharp pain temporarily knocked the wind out of her. Her bed was empty, and Joey wasn’t there.
Her breathing quickened, her pulse raced. Her head snapped from side to side, looking around like he was just out of sight. Her hands trembled, like she was outside in January without a coat. She needed to find him; she didn’t want to be left alone. She wanted to call out for him but didn’t know where her parents were. She felt like she was going to hyperventilate and desperately tried to calm herself down.
“He’s probably just in the bathroom,” she whispered to herself, hoping it would work. “I need to see, I need to find him now.”
Pulling the sheets back, Gwen hobbled out of bed. She didn’t even remember getting in last night or putting on her sleeping shirt. The last thing she remembered was Rachel offering to drive them home and then getting in the car. As for the rest of the night, she wished she could block that out, but the pain in her crotch kept bringing it up. The biggest question on her mind, however, was: Where is Joey?
Gwen took a quick look at herself in a small mirror. She thought she looked haggard and tired, which made sense given how she’d spent her night. She’d cleaned herself up at Todd’s with her bag of supplies, but she hadn’t been in the right headspace to be thorough. Her chestnut hair was a knotted shambles; she wondered if she’d missed some jizz getting into her hair last night. Beyond her bloodshot eyes with dark circles, she would be passable till she could climb into the shower for a closer inspection.
Opening the bedroom door, she limped out cautiously. Each step sent a burst of searing pain up her spine, but she needed to find her brother. When she entered the kitchen, she found him sitting at the table eating cereal and talking to their parents.
“Good morning, sleepyhead,” her mom chirped. “Wow, you look a little worse for wear today.”
If Gwen wasn’t desperately scrambling to come up with an excuse for her condition, she would have broken out in laughter. If her mom knew the reason why, she’d probably think Gwen looked pretty good, considering. Gwen’s brain was just too busy and clouded to come up with anything quickly; luckily, Joey stepped in.
“Yeah, as I said, I think we both drank a bit too much last night.” Joey gave Gwen a look that said, just go along with it.
She understood. “Yeah, you know ... probably should have toned it down, but we’re on vacation,” she added, then feigned a headache. Ironically, it was one of the few parts of her body that didn’t hurt.
Their mom looked at them and shook her head. “Just be careful drinking, especially you, Gwen. Someone could slip something in your drink and try to take advantage of you. I mean, Joey’s there, but some girls aren’t that lucky, and you never know.”
Dad rolled his eyes. “Honey, the kids are smart enough to know that. Besides, everyone we’ve met here has been so nice; I’m sure they’ll be fine.”
Joey and Gwen shared a look. They both knew what the other was thinking; that it was a little too late for that advice. Gwen gingerly walked to grab a bowl so she could eat breakfast. She was starving. Beyond the liquid protein she’d consumed last night, she hadn’t eaten anything since supper. Unfortunately, their mom noticed her slight limp.
“What’s wrong with your leg?”
Gwen was able to cover this one, “I -uh tripped, er, well, stumbled last night getting in.”
Their mom was a little concerned. “Are you ok?”
“Yeah, it’s fine. It isn’t that bad.” Gwen played it off as best as she could. She did her best to walk properly as she walked back to the table, bowl in hand, and sat down on the hard wooden chair. She clenched up and gritted her teeth as white-hot pain ran through her battered body.
“What time did you both get in?” their dad asked while munching on some toast.
“After midnight,” Joey said with certainty; he didn’t know exactly when beyond that.
“Late night,” replied Dad. “Well, I hope you had fun and didn’t get into too much trouble.”
“No, Dad,” they both replied at exactly the same time.
Their mom rolled her eyes. “What are you two going to get up to today then?”
Joey looked to Gwen for an answer. He knew she looked to be in a lot of pain. He couldn’t even imagine how else she could be feeling, both physically and mentally, after last night. Just having to watch it happening to his sister felt traumatic enough, let alone the one crazy bitch who gave him just a taste of it. Yet, there she was at the table eating a bowl of cereal like it was a normal Tuesday. It was obvious she was hurting, but everything else seemed perfectly normal.
“I don’t know,” Gwen said, looking back at her brother. “Maybe beach or just take it easy around the hot tub?”
Joey was shocked. “Ye-eah, sure. We could do that.”
Dad nodded. “Yeah, it’s too bad. We found some nice nature trails nearby and were going to see if you wanted to join us, but it looks like you’re both in rough shape.” He had a good laugh. “Just wait till you get older; it gets even harder to recover from a long night out.”
Joey and Gwen said goodbye to their parents and watched them head out for a day on the trails. They were both smiling and waving until the car pulled away. As soon as it was out of sight, Gwen’s legs buckled, and she fell over. Joey managed to catch her before she hit the floor.
“Jesus, Gwen, are you ok?” he asked, extremely worried.
Gwen grimaced, “Yeah, just ... pretending to be ok was way too taxing. Have you showered yet?”
“Yeah, after I got up.”
Gwen looked at him pleadingly, “Could you take another one with me?”
There was no way Joey could refuse. He put one of Gwen’s arms around his neck and his behind her back. Supporting her weight, he helped her walk to their bathroom. She flinched as he set her down on the closed toilet seat.
“How bad are you, honestly?” asked Joey while turning on the water.
Gwen shifted her legs. “I feel like Swiss cheese ... that thirty people fucked. Where’d you go this morning? I woke up, and you were gone.”
Joey looked guiltily at his feet. “You were pretty out of it last night. I thought you could use a night of sleep on your own.”
“No, Joey, I need you beside me at all times, you know that! Especially after last night. What’s the real reason?” Gwen stared at him.
“Mom and Dad will start to catch on if we’re constantly sleeping together and...” Joey stopped himself.
Gwen wasn’t about to back down, “ ... and what? Tell me.”
Joey shuffled his feet, “After Rachel and I brought you in last night, I started undressing you for bed. I took off your shirt and skirt to get you naked like you always sleep now. Well, I only had your panties left. When I tried to take those off, everything was just caked in cum ... I just ... I couldn’t do it. I just kept picturing those guys one after another...” Joey stopped to take a few breaths. “I put you through this. This is all my fault. I left on your panties and put your sleeping shirt on and tucked you into bed. I stayed for a little while, then went to my own room. I’m sorry.”
Gwen shook her head and stood up, which felt like torture. Placing her arms around her brother, she hugged him tight and kissed his neck.
“I love you, Joey. I know you feel guilty about this, and yeah, it sucks. I need you though; I need you to be strong for me, and I need to know I can count on you at all times,” Gwen said as she pulled off her brother’s shirt. “I might ask you to do things that seem strange or don’t make sense, but I need you to just do them for me, ok?”
Joey choked up, and his eyes watered. “Ok, Gwen.”
“One of those things,” Gwen continued, “ ... is I need you in my bed every night. I don’t want to be left alone, ok? I know it sounds bizarre, but it’s one of the only ways I can deal with all this right now; knowing my big brother is right beside me makes me feel safe.”
“It didn’t help yesterday,” said Joey morosely.
“It did though. You have no idea how much it did ... for me. Why do you think I agree for you to go last when we could have just done that at home? It was something to hang onto. At this point, all I have is a tiny little string to grip on to - you, Joey. Please don’t break on me.”
Joey held her close; the stale smell of sweat and something else clung to her skin and hair. She really needed a shower. He kissed her cheek anyway. “I won’t, Gwen. I’m sorry.”
“I know. Just remember, don’t leave me again.” She kissed his lips. “Now help me out of these clothes. I feel like a restroom floor on the side of a highway.”
Her joke broke the tension and made Joey chuckle. He added, “Yeah, I didn’t want to mention it, but you smell like one too.”
Gwen raised her arms over her head, and Joey pulled her shirt off. He then knelt before her and hooked his fingers on the sides of her panties to pull them down. This was what stopped him last night, but with Gwen conscious, he pulled. They stuck to her skin and hair, slowly peeling away like they were glued on. When they dropped below her pussy, he could see everything was covered in a white film of dried cum. The pad she’d put on while cleaning up was yellowed and had a few small specks of blood on it. Gwen rolled it up and tossed it into the waste basket.
“How’s it look down there?” Gwen asked curiously. She wondered if it looked as bad as it felt.
“Messy ... and still kind of red...” Joey replied, observing what he could see without touching too much. He stripped off the rest of his own clothes and eased her into the shower. It took a bit to get her legs over the edge of the tub, but eventually they managed.
The water felt better than Gwen thought it might, as it cascaded down her body to wash away the sticky remnants of last night. Joey helped her wash, his hands soaping up and softly scrubbing her skin. The good thing was there didn’t appear to be any external bruising, so their parents wouldn’t ask any questions. As his hands washed her breasts, Joey couldn’t help but get excited. He tried to ignore it as much as he could.
Joey was extra careful when he wiped and cleaned around her abused sex. He knelt down in front of her to see what he was doing. Gwen flinched at his touch. It was still very raw and tender. He did his best, though, to clean up as much of the residual cum that still lingered inside her pussy. He knew there was no way to get all of it out; her body would have to clean itself naturally. His bigger concern, one he seemed to think Gwen was ignoring, was the risk of her getting pregnant. After seeing the sheer amount of jizz deposited in her last night, Joey knew there was no way she was getting through the summer without being bred.
“Joey?” Gwen asked softly. “I’ve got a little problem.”
Carefully getting back to his feet, making sure not to knock her over, Joey stood up. He looked at her cute face, which looked uncomfortable and nervous. After everything they’d done together and had to endure so far, he couldn’t understand what the problem could be.
“What’s wrong? You know I’ll help in any way I can ... are you sore, like, do you need to sit down...?”
“No, Joey.” She blushed and shook her head. “I -uh ... I have to pee...”
“Uh ... oh.” Joey paused awkwardly, thinking. “Can you hold it till after?”
Gwen closed her eyes and shook her head. The sound of the falling water from the shower and Joey’s touches down below had called attention to the build-up inside of her. If her legs weren’t so sore, she’d have been dancing in place.
“Do you want me to help you to the toilet?” he asked, thinking of options.
“No, I’m too wet, and my legs are too sore. I’m afraid I’ll slip on the floor.”
Joey thought some more. “I guess you can just pee in the shower. It all goes to the same place anyway. I’ll step out to give you some privacy.”
“NO!” Gwen squeaked. “Please don’t leave me ... I’m not- I don’t want to be left alone.”
Joey sighed and let out a short growl of frustration. “OK, then what would you like me to do?”
“Could you help me sit down on the edge of the tub?”
Joey was confused, “Why the edge? Why don’t you just sit down or stand there and do it?”
Gwen shook her head. “Sitting down normally hurts too much, and it’ll be hard to get back up. My legs are feeling a little wobbly at the moment...”
“OK, what do you want me to do?” Joey asked. He knew he’d help his sister do anything, but he hadn’t planned for this. For some reason, it excited him. He thought about watching Rachel pee and how different it was to him doing it. He didn’t expect he’d see it happen again, though.
“Just help me by holding my arms and sitting me down on the edge of the tub with my back resting on the wall for support. That should take the weight off my pussy and put it on my ass instead...”
“ ... till they start fucking that too...” Joey muttered glumly.
Gwen heard him and glared. “That’s not helping, Joey.”
“Sorry, Gwen.” Joey hung his head. He didn’t know why he’d said that ... especially out loud.
He shut his mouth and did what she asked, lowering her gently to the edge of the tub. There was one issue, though: she didn’t have enough strength in her legs and feet to keep from slipping. Her feet just kept skidding out from under her in the slippery porcelain tub. Gwen grew discouraged as Joey had to use his feet and hands to lock her in place.
“This is so humiliating,” Gwen complained. “I was hoping you could at least turn around and not watch.”
“It’s ok,” Joey tried to make up for his earlier remark. “After yesterday, me watching you pee should be nothing. Just do what you need to do, ok?” He gave her a loving smile, and it put Gwen at ease.
“Thanks, Joey. Ok, here goes...”
Gwen closed her eyes and tried to imagine she was alone. She felt the pressure in her bladder and listened to the sound of the water. She really had to go, so it only took a few seconds for the flow to start.
Joey saw his sister’s eyes were closed, so he looked down at her hairy slit. It was harder to see inside than Rachel’s was, but he could see some of her raw reddish-pink flesh past the thicket of curly brown hair, then a stream of yellow liquid shot out. It splashed with the water from the running shower and ran past their feet. In the dark recesses of his mind, Joey wished his sister would use her fingers to spread herself open as Rachel had done. He wanted a better look. As the stream abated, Joey looked back up to Gwen’s face. She was staring intently at him. He had been caught, and worst of all, he was sporting a stiff erection.
“Were you watching me pee?” said Gwen accusingly.
“I- well, where was I supposed to look?” Joey replied defensively.
“Anywhere else!” Gwen snapped back. “I didn’t know you were one of those people.”
“It’s just ... I was curious...”
“Well, tell me next time; don’t just have me catch you watching like a weirdo.” Gwen shook her head and pointed at his dick. “Look at that thing. I wish I could help with that but...”
Joey smiled, “I know, don’t worry about it.” He helped her stand back up, and she hugged him.
“Maybe tonight I’ll be ok to do something ... probably not in my pussy though.”
Joey waved her off, “It’s ok, you don’t need to. I think you’ve done enough in the last twenty-four hours.”
“How many times have I told you, no matter what, we’re in this together. If you’re willing to share your bed with me each night to keep me comfortable, the least I can do is help relieve your ... uh ... stress. That is, apparently, what I am for. I’m joking, of course.”
Joey knew not to argue with Gwen on this. If she wanted to and was willing, who was he to say No? There was a small nagging thought that stuck and stung like a splinter in his mind. Gwen’s words sounded eerily similar to those of Todd. Even though she said she was joking, Joey was getting the feeling that Gwen might be starting to enjoy their little bedtime fun. Though he hadn’t admitted it openly, he was feeling the same. It was something he couldn’t stop thinking about for the rest of the day. When they went to bed together at night, Gwen offered him a blowjob, which he gladly accepted.
The next day, Gwen and Joey carried their gear to the beach. Gwen was feeling better, able to walk without a limp or wince in pain from a mere touch. Both knew they couldn’t hang around the house again. She still couldn’t have sex, not without feeling a good amount of pain. The two siblings tested it out after they woke up, with Joey slowly sliding his prick inside her till she had to tell him to stop. He pulled out immediately, and she finished him with her mouth.
“I really don’t like this,” said Joey when they left the house.
“Neither do I,” Gwen confided, “let’s hope they are fine with blowjobs.”
Joey already knew that was likely a hope too far. For the first few hours, as they lay on the beach or swam in the lake, it appeared she may have been right. They’d seen no sign of Todd or his boys through lunch, when they pulled out some snacks and drinks on the beach. Their luck ran out around 2:00, when Todd arrived, strolling casually from the woods.
“Ah, there you are. I should have known,” he said, sitting down beside Gwen.
“Hello, Todd,” they both said in unison.
“Wow, a friendly greeting. I wasn’t expecting that,” he said with a light chuckle. “How are you both doing?”
Gwen stared blankly at him. “I’m in pain, Todd. It hurts to do most anything.”
He shrugged, “Yeah, that happens. You’ll eventually get used to it. My sister can do one of those every other day now, if I tell her to.”
Gwen had to bite her tongue, just thinking about someone else having to endure that multiple times a week. Once in a lifetime was bad enough. It would explain why Rachel felt so hollow and detached at times. If Gwen had to do that a few more times, especially without Joey, she’d likely be the same way.
Todd looked at her intently, checking to see what her reaction was. She tried her best to show her disdain at the thought of doing that again, though she suspected it wasn’t a one-time thing. The thought sent a little shiver down her spine; she hoped it was simply disgust and not something else.
Standing up, Todd stuck out his hand. “Well, shall we be off?”
“What?” asked Joey. “She can’t ... you know ... that’s just cruel.”
Todd shook his head. “Joe, firstly, don’t tell me what I can and can’t do with my property. What you do once I give her back to you is your business, but right now she belongs to me. Understand?”