Ethan's Nieces
Copyright© 2025 by sublock
Chapter 19: An Unexpected Guest
Incest Sex Story: Chapter 19: An Unexpected Guest - A young man comes home from his first year of college to find that his family's changed... a lot. As the summer progresses, he gets a strange summer job and faces some big fears with the support of his parents and siblings. Note: has quite a lot of partner-sharing (swinging). Not an exclusive harem story.
Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa mt/ft Ma/ft mt/Fa Fa/Fa ft/ft Fa/ft Mult Teenagers Consensual BiSexual Heterosexual Fiction Workplace Sharing Wife Watching Incest Mother Son Brother Sister Father Daughter Cousins Uncle Niece Aunt Nephew Grand Parent InLaws Rough Gang Bang Group Sex Orgy Polygamy/Polyamory Swinging Anal Sex Cream Pie Double Penetration Exhibitionism Facial Oral Sex Voyeurism Public Sex Small Breasts Nudism AI Generated
Lauren stretched after our intense session, her body still flushed and glistening with sweat. She reached for her discarded clothes, pulling her shirt over her head, but then I saw her pause, laugh softly to herself, and think better of it. She stripped the shirt back off and stood naked, glancing around at the clearly indifferent reactions throughout the bus.
“Fuck it,” she said with a grin. “When in Rome, right?”
She headed toward the back of the bus, presumably to use the bathroom. Emma and I stayed sprawled across our seats, catching our breath, David doing the same nearby. The post-sex contentment was palpable — we felt satisfied, relaxed. We’d broken through to her.
Then Lauren’s voice cut through the calm: “What the FUCK?”
I sat up immediately. Lauren was standing by the luggage area in the back, staring down at someone hidden among a pile of carry-on bags. A moment later, a figure emerged — Becca, Lauren’s sixteen-year-old sister, looking defiant and terrified in equal measure.
“Surprise?” Becca said weakly.
“BECCA!” Lauren’s scream was pure fury. “What the hell are you doing here?”
I rushed back, Emma right behind me. Other people on the bus were turning to watch — David standing, Tom waking from his nap, everyone aware something was happening. For the first time on the trip the driver glanced up at her mirrors, alarmed.
I couldn’t quite hear what was said next, but Lauren exploded. “Why the fuck would you follow me?” I couldn’t help but shake my head — voyeurism ran in the family, apparently.
“I wanted to see!” Becca shouted back, immediately defensive. “I wanted to know what was so important that you’d throw away everything for these people!”
“That’s none of your business!”
“None of my business? You’re my sister! You raised me! And now I find out you’re — you’re FUCKING them?” Becca gestured wildly at us, as we began to gather and watch. “The whole family? What the hell is wrong with you?”
Lauren’s face went red. “Nothing is wrong with me!”
“Everything is wrong with you! You’ve been corrupted! You’re part of some sick cult where everyone fucks their relatives and you think that’s okay?” Becca’s voice was rising to a shriek.
“Yes, I do think it’s okay!” Lauren shouted back, and I could see the moment she committed to it fully — no more hedging, no more ambivalence. “Because it IS okay! These people are good and honest and they love each other!”
“They’re degenerates!”
“Don’t you dare —” Lauren lunged at Becca, and Becca lunged back, both of them screaming, hands grabbing at hair and clothes.
Tom and I jumped in immediately, pulling them apart. Tom grabbed Becca while I wrapped my arms around Lauren from behind, holding her back as she struggled.
“Let me go! She doesn’t understand—”
“You’re insane!” Becca was crying now, struggling against Tom. “You’re completely insane!”
“Everyone calm down!” I said forcefully. “Lauren, breathe. Becca, please! Stop!”
It took a minute, but eventually both sisters stopped fighting, though they glared at each other with pure fury. Tom and I slowly released them, ready to intervene again if needed.
Becca collapsed onto a suitcase, her bravado crumbling. She buried her face in her hands and sobbed. “Why did I even come here? What was I thinking? Getting on a bus full of sickos, watching my sister get fucked right and left in front of me, and now I’m stuck, I’m stuck going to the mountains with all of you and I don’t know what’s going to happen —”
Emma moved forward carefully, kneeling in front of Becca. “Hey. Look at me.”
Becca looked up, mascara running down her face. “ ... Emma?”
“Nothing is going to happen to you that you don’t want to happen,” Emma said firmly. “That’s the rule here. Consent. You don’t want to participate? You don’t have to. You just want to observe? That’s fine too.”
“But what if...” Becca’s voice was small. “What if I don’t know what I want? Am I gonna become a sex freak ... like ... like you guys?” Her assertion came from a place of clear desperation.
The question hung in the air, loaded with implications. Lauren stared at her sister, Emma looked back at me, and I realized this was more complicated than just a stowaway situation.
“We don’t know what you want, either,” Emma said gently. “So no pressure. No judgment. Just ... take some time with yourself. With Lauren, too. She cares about you.”
Lauren swallowed hard, nodding, her freckled skin shivering. She looked like she had shifted from wanting to tear her sister apart to wanting to hug her, but she was clearly paused by her own nudity, her nipples hard in the open air, wetness still clinging to her inner thighs. She didn’t want to panic her sister.
Lily caught this and brought us our clothes, and we got dressed — it seemed wrong to have this conversation while naked. We guided Becca to sit with us back up in the front, and I grabbed some snacks and water bottles from the mini-fridge, putting them in front of her.
“Eat,” I said. “Drink. You’ve been hiding for hours. You must be starving.”
Becca took the water and drank greedily, then grabbed a bag of chips and ate mechanically. The physical needs being met seemed to calm her slightly.
“I’m sorry,” Lauren said quietly. “For yelling at you. For ... being a sex freak, I guess.”
“I’m sorry too,” Becca whispered. “I shouldn’t have called you names.”
David had his phone out, and I heard him dial. “Richard? It’s David Walker. We have a situation.” He explained about Becca, about her sneaking aboard, about the confrontation. His tone was matter-of-fact, not panicked.
There was a pause while Richard responded, then David laughed. “Seriously? Okay. Yeah, I’ll tell them.” He hung up. “Richard says welcome aboard. He’s not concerned. Says if she made the effort to sneak onto the bus, she clearly wanted to be here, and we should honor that choice.”
“That’s it?” Lauren asked, incredulous. “No consequences? No sending her back?”
“Where would we send her back to?” David pointed out. “We’re two hours from the city, heading to the mountains. She’s here now. We deal with it.” He looked Becca in the eye, but also glanced at Lauren. “If you guys want to get off, you can.” Then he winced at what he’d said, as Mia snerked and elbowed him in the ribs.
Becca was processing this, her eyes widening as the reality sank in. “Wait. So I’m going to the retreat? The actual retreat? Where hundreds of people are going to ... do things?”
“If you want,” Emma said simply.
“Oh my God.” Becca started hyperventilating. “Oh my God, I didn’t think this through, I just wanted to see, but now I’m actually going to be there, and everyone’s going to be having sex, family sex, and I don’t know if I can handle —”
Lauren grabbed her sister and pulled her close. “Listen to me. I will stay with you the entire time if you need me to. Freaky sex all around us, whatever happens. You’re my priority. My sister. I won’t leave you alone.”
Becca sobbed into Lauren’s shoulder, and I felt a wave of tenderness watching them. For all their fighting, the love between them was clear.
Mom must have been watching from nearby because she suddenly appeared, sitting on Becca’s other side. “Sweetheart, may I?”
Becca looked up at this stranger with confusion. “Who —?”
“I’m Dolores. Ethan and Emma’s mom.” Mom’s voice was warm, maternal. “And I know what it’s like to feel overwhelmed by all this. To not know if what you’re feeling is okay.”
“You do?”
“I do. I spent years denying my desires because I thought they were wrong. But my family — my son and his wife —” She looked at David with appreciation, “They taught me that honesty is more important than conformity.” Mom stroked Becca’s hair gently. “You’re safe here. You’re allowed to feel whatever you feel.”
Becca leaned into Mom’s touch, clearly starved for maternal affection. “My mom never ... she was never like this. Never warm.”
“I’m sorry,” Mom said. “But I can be here for you now, if you want.”
“Yes,” Becca whispered. “Please.”
Mom wrapped her arms around Becca, and I watched my mother provide the comfort this girl had never received. Becca cried harder, years of neglect spilling out, and Mom just held her, rocking slightly, murmuring reassurances.
Lauren watched with tears in her own eyes, clearly moved by seeing her sister receive the love that they struggled so hard to get.
After several minutes, Becca pulled back slightly and looked at Mom with red-rimmed eyes. “Can I ... is it okay if I kiss you?”
Mom looked concerned. “Becca. You’re emotional, you’re not thinking clearly...”
“I know, I know,” she whimpered, holding onto her. “I just ... Mommy ... I just...” My mom looked at us with confusion, and looked at Lauren. Lauren watched her sister cry into her chest, and then nodded slowly.
Becca turned her face up tentatively and Mom met her kiss. It was chaste at first—just lips, testing, seeking comfort. But then it deepened, Becca’s mouth opening, her tongue sliding against Mom’s, and the kiss became something more.
When they broke apart, Becca was crying again. “I’m sorry! You’re right! I don’t know what I want. I’m so fucking confused.”
“That’s okay,” Mom assured her. “Trust me, girl. Confusion is part of the process.”
Lauren moved closer, and suddenly it was the three of them — Lauren, Becca, and Mom — in a tight embrace. They kissed each other in rotation, soft and exploratory, providing comfort through physical affection. Mom’s hands stroked both girls’ backs, Lauren’s hand found Becca’s face, Becca’s fingers tangled in Mom’s hair.
It was tender and sexual and therapeutic all at once — three women processing trauma and desire in real-time.
Lauren’s hand slid under Becca’s shirt, and Becca gasped but didn’t stop her. “Is this okay, Becca?” she asked, swallowing hard.
“Yes,” Becca breathed. “Please don’t stop.”
I couldn’t believe what I was seeing. My mother was practically glowing, and these poor, struggling girls were shivering and fearless, in a way. Reaching for each other and then nervously flinching back, but bit by bit, their affection evolved, Mom gently guiding and leading the way.
They helped each other undress slowly — shirts coming off first, then bras, until all three women were topless. Mom’s full breasts, Lauren’s medium ones, Becca’s smaller but pert. They explored each other’s bodies with gentle touches — hands cupping breasts, thumbs brushing nipples, fingers tracing curves.
Nearby, I noticed Lily, Marcus, and Mia watching intently. Lily whispered something to the twins, and they nodded. The three of them moved to a nearby section and began their own slow, tender demonstration — Lily kissing Marcus while Mia kissed her brother, all three of them undressing each other with obvious love and care.
“We’re here too,” Lily called softly to Becca. “It’s okay to want this.”
David stood beside me, both of us watching what was happening with wonder and pride. “They’re good kids,” he said.
“The best.”
Our attention was drawn back to Mom, Lauren, and Becca. Mom had laid Becca across the seat and was kissing down her body — her neck, her chest, her stomach. Becca’s pants and underwear came off, and Mom positioned herself between Becca’s legs.
“I’ve never...” Becca started.
“I know,” Mom said gently. “Let me show you how good it can feel.”
Mom’s tongue made contact with Becca’s pussy, and Becca cried out, her back arching. Lauren moved to support her sister’s upper body, kissing her, stroking her hair, whispering encouragement while Mom ate her out with expert skill.
I felt my cock hardening again despite the orgasm in Lauren and the ensuing drama. Beside me, David was obviously aroused too, his cock beginning to tent his pants.
That’s when Keisha moved between us — Gorgeous Keisha, pure sexiness and lust, gazing at us with those dark eyes liable to drive a man insane, her beautiful dark body in just her underwear — noticing our arousal and smiled. She was lace and sexiness in such an incredible package. She moved in front of us and knelt in front of both David and me with desire in her eyes.
“Need some comfort too, fellas?” she asked.
We both nodded, and she freed our cocks one after the other, her skilled hands stroking both of us before taking David’s into her mouth. She alternated — sucking David and stroking me for a minute, then switching it up, then back, her technique flawless.
Emma and Dad had found their own corner the next row up. I watched Dad gently lay Emma back, and he asked: “Mommy’s eating some pussy, can I nibble on you, baby girl?”
“Yes, Daddy. And I want you to fuck me after.”
Dad buried his face between Emma’s legs, his tongue working her pussy while Emma practically purred while playing with her breasts.
Maya and Tom, who’d been watching everything with increasing arousal, were groping each other. It turned passionate and they began to lose themselves in it. I watched her — this amazing woman, with the feelings we’d been exploring — pull my brother-in-law down, and they arranged themselves in a sixty-nine position — Maya on top, her pussy over Tom’s face while she sucked his cock. Jessica, never one to sit on the sidelines, sat next to them, her hands roaming their bodies, occasionally leaning in to kiss skin or help Maya suck her husband.
Then she looked up and noticed Keisha in front of me and David and grinned. She left them to their fun and kneeled down in front of us as well, both women now servicing our cocks — Keisha focused on David while Jessica took me deep into her throat.
The bus had rapidly transformed into a full-scale orgy. Everywhere I looked, people were engaged in various sexual acts:
The Madison family — Josie and Robert with her brother James and Carol, along with their kids — had apparently started going at it before all the drama started, and were now resuming their activities. Josie was riding her husband while their daughter Leah ate out Carol. James was being sucked by one of his sons while fingering one of his daughters. The intergenerational, inter-sibling dynamics were complex and beautiful. That they felt comfortable loving each other with us nearby was testament to the vibe that we were all soaking in, and it was infectious, I could see Becca losing herself to it.
At the center of it all, Mom continued working Becca toward orgasm while Lauren helped, playing with her and encouraging her sister to lose herself to pleasure. Becca was whimpering and moaning in equal measure, her tears starting to dry, overwhelmed by sensation and emotion.
“I’m going to cum,” Becca gasped. “Oh God, I’m —”
“Let go,” Mom encouraged, her breath hot between Becca’s shivering legs. “You’re safe. Let yourself feel good.”
Becca came with a wail, her whole body convulsing, her thighs clamping around Mom’s head. Mom worked her through it patiently, not stopping until Becca’s spasms subsided and she lay panting and crying.
Lauren immediately moved to hold her sister, and Mom joined them from the other side. The three women cuddled together, Becca sandwiched between them, still trembling with aftershocks.
“Oh God,” Becca whispered to Mom. “Oh God, I hope I get to do that again.”
“Any time, sweetheart.”
Jessica and Keisha had switched positions in front of us again, and now Keisha’s mouth was on my cock, her full lips wrapped tight around my shaft. She was incredible — her tongue working the underside while she took me deep, her dark skin glistening with sweat. Her breasts hung heavy as she kneeled in front of me, and I couldn’t help reaching down to cup them, feeling their weight, thumbing her hard nipples.
“Fuck, Keisha,” I groaned. “You’re going to make me cum again.”
She pulled off with a wet pop, a string of saliva connecting her lips to my cock. “That’s the idea, pretty boy.” Her voice was husky, sexy as hell. “But I want it somewhere specific.”
She positioned herself between my legs and pushed her breasts together, creating a tight channel. My cock was slick with her saliva, and she slid it between those soft pillows, the sensation completely different from her mouth but equally intense.
“Oh god,” I breathed, watching my cock disappear between her tits, then reappear with each thrust.
Keisha held her breasts tight, creating pressure, and started bouncing slightly, adding her own movement to mine. Her dark nipples were hard against her palms, and she licked her lips watching my reaction.
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