Unchartered Waters
Copyright© 2025 by Franz Kowal
Chapter 10: Game Over
Incest Sex Story: Chapter 10: Game Over - An innocent family holiday descends to the depths of depravity as Eva recognises her feelings for her brother, Matti.
Caution: This Incest Sex Story contains strong sexual content, including Teenagers Consensual Romantic Heterosexual Fiction Sharing Incest Brother Sister Group Sex Interracial Black Female White Male White Female Exhibitionism Oral Sex Safe Sex
I felt the relentless heat of the sun beating down on my back as I watched the bottle come to a stop; the open tip pointed at a girl on my right. She giggled, her ginger hair tied back, a sun-kissed patch adorning her nose and cheeks that framed her sparkling eyes. My gaze lingered just a heartbeat too long on her breasts, barely contained in her bikini. I shook my head and spun again, forcing my thoughts away.
As the bottle whirled, I locked eyes with Matti. My heart raced for a moment—I hoped it wouldn’t land on him. I held my breath, watching the bottle wobble before landing on a boy sitting next to Gemma. He had pitch-black hair contrasting with his unusually pale skin, a smirk tugging at his lips as he and Gemma exchanged knowing glances, waiting for their challenge.
“Come on, don’t pussy out on me,” Gemma goaded, her voice sharp yet teasing, filled with that familiar edge of playful dominance. “Give them a real challenge!” She leaned back onto the hot sand, her laughter ringing in my ears and igniting a spark of defiance within me.
I needed to remind her who was really in charge. She had no idea who she was dealing with. Ideas raced through my mind, settling on something deliciously devious as I observed the two players. My eyes darted around the sun-soaked beach, taking in all the people sunbathing and splashing in the sea. All that exposure thrilled me yet made me crave the freedom that came with recklessness.
“You!” I purred, smiling at the boy, sinking to my knees and inching closer until his breath caught. “Go suck her nipple in front of everyone.” The gasps that travelled through the circle felt intoxicating, the boy’s face flushed crimson, and I revelled in the thrill, my exhilaration more potent than the drink I had just downed.
Leaning back, I watched as he got onto his hands and knees, crawling toward the ginger girl. Her mouth was open, breathing heavily, anticipation hanging thick in the air as the music pulsed around us.
The girl gasped as he touched her breast, the soft flesh spilling out as he traced a path down her bikini edge, revealing her perfect pink nipple, hardened with desire. I caught Gemma squirming next to me, and it made me drunk with power.
The boy’s lips were sealed around the ginger girl’s nipple, his nose pushing against the soft peak of he breast as he sucked and savoured her taste. He finally let go, breathlessly returning to his place, the air thick with electricity and arousal.
“Holy fuck...” I heard Gemma whisper, her eyes locked on the display. I quickly shot her a smirk, handing her the bottle.
“A fair way to start, huh?” I teased, satisfied to see how my challenge had ignited her competitive spirit.
“Alright...” Gemma replied, that familiar glint of mischief dancing in her eyes as she leaned down to spin the bottle. The chatter resumed, laughter floating in the air, thick with anticipation.
“Fuck!” I exclaimed when the bottle came to a stop—and pointed straight at me. The group erupted in cheers, my cheeks flushed with embarrassment. What would Matti think of me with another guy? Uncertainty clawed at my stomach, but I couldn’t back down—not now.
Gemma’s feline fingers danced around the bottle, spinning it with flair. But her confident expression began to falter as it slowed, grinding through the sand before landing on her. She shot me a challenging glance, her smirk unabated.
“What now?” I thought, my heart racing.
“Well, well, well,” Gemma purred, leaning closer to me, her scent—a mix of sunscreen and something sweet—overwhelming. I tried to pull my gaze away from her and found Matti’s eyes instead. His jaw clenched, fists gripping the sand tightly. His eyes held me in place, frozen by the stern expression on his face, yet I could sense the permission he gave,
“Let’s give these losers a show, yeah babe?” Gemma grabbed my cheeks, pulling my gaze back toward her as something heated coursed between us. I hated her touch, yet my body betrayed me, melting under her presence.
I stifled a gasp as she straddled my lap, passersby turning to observe our lewd display. Her breasts pressed against mine, sending shivers down my spine as our lips met in a kiss, her warmth overwhelming me. I opened my eyes briefly to catch Matti’s, then shifted my gaze back up to her, watching as her eyes focused on my brother, watching him as she claimed me.
Desperation surfaced. I needed to redirect her attention away from him, to reclaim my place. My hands gripped her ass, fingers sinking into her soft flesh. She gasped, then sank her teeth gently into my lip—a fierce battle of wills, trying to pull her away from what was undeniably mine.
When she finally pulled back, both of us breathless, my chest burned from the intensity. We stared into each other’s eyes, a delicious stalemate I wasn’t sure I could escape.
“Go kiss your boyfriend,” Gemma blurted out, adjusting her bikini. My eyes widened at her boldness, sensing her desire to regain control.
“What? Your turn is finished...” I shot back, glancing nervously at Matti.
“I mean, he just watched you kiss another girl.” She chuckled, attempting to weave her manipulation, “Maybe apologize and let him taste me on your lips?” She shot me a sly wink, a challenge hanging in the air.
My cheeks ignited with simmering rage and defiance. Just as I opened my mouth to retort, I felt the sand shift beside me. Matti crawled closer, a serious expression on his face—the air around us thickening with tension.
Before I could speak, his lips brushed against mine, then pushed into a passionate kiss, claiming me in front of everyone. My heart raced; my own brother kissing me so openly, surrounded by oblivious onlookers, made both desire and dread collide within me.
As the kiss deepened, the circle fell silent, tension crackling in the air as our connection broke through the pounding music. He was like an animal, displaying claim on his mate, pulling me deeper into the dizzying kiss with each wet smack of our lips.
Then, in an instant, that silence shattered.
“Guys? There you are!” My mom’s voice pierced the heated atmosphere, igniting fear in my stomach. How much had she seen?
Matti and I jumped at the intrusion, both responding in unison, “Coming, Mom!”
Gemma’s eyes lit up with malicious glee, realizing the revelation of our secret. My heart raced as I watched my mom approach through the sand, each step fuelling my uncertainty.
We stumbled out of the circle, but I could sense Gemma trailing behind, a dark shadow of temptation—a punishment for our sin.
“Sorry, Mom, we were just hanging out.” Matti nervously rubbed the back of his neck, sweat trickling down his brow.
Before I could explain, Gemma pushed past me, smiling radiantly at my mom. “Hi, Miss! We invited them over for a game,” she chirped, the innocence in her tone a sharp contrast to the chaos unfolding beneath the surface.
I stood in disbelief, jaw dropped, watching this exchange unfold. Why was she here? What was she planning? Why didn’t she say anything?
I shook my head and blurted, “Did you find a spot, Mom?” My panicked urgency thickened the air between us.
“Yeah, sweetie, just down there,” she said, extending her finger toward our dad sprawled out in a sun chair, waving cheerfully. My heart raced as I grabbed Gemma’s wrist, pulling her aside.
“Ok, Mom, we’ll catch up with you in a sec. Just gotta say bye to Gemma.” I cast a quick glance back, relieved to see her starting to walk away, unaware of the storm brewing within.
“What do you want?” I hissed, my voice low and careful, tension knotting my stomach.
Gemma bit her lip, thinly veiling her excitement. “So you two are...” Her playful tone dripped with mockery.
From behind me came Matti’s voice, strained, “Please don’t tell anyone, ok?”
“Why would I?” Gemma teased, her gaze flickering between us with a predatory gleam. “Especially when we could have so much ... fun together.”
The air thickened with electricity, and I clenched my fists, struggling for control. Maybe her words were stirring something in me. Maybe there was an indulgence waiting to bloom.
“What kind of fun?” I asked, breath hitching, curiosity mingling with dread.
“Come to my room later. I’m in 307 at the Leonidas Hotel.” She traced a finger along my chin, down my neck, igniting sparks along my skin. “I’ve never had a brother and sister to play with before.”
Her words cut deep, awakening a thrill that pulsed through me against my will.
“What? Are you sure?” Matti’s voice, a mix of apprehension and excitement, turned toward me. His nervousness contrasted sharply with the heat pooling within me, a fierce conflict raging.
I shot Gemma a confident smirk. “Yeah, Matti, let me prove to you that I can do it better.” A challenge slipped from my lips, igniting the air between us, potent with anticipation.
Gemma grinned, her dark skin shimmering in the sunlight as she walked away, swaying her hips enticingly, clearly relishing the tension she’d created. “We’ll see about that, little sis.” Her laughter echoed as she rejoined her group, leaving Matti and me in a whirlwind of uncertainty.
We walked over to our parents silently, minds heavy with the implication of what we agreed to. Was I ready to share Matti? Was he ready to share me? I couldn’t get the images out of my head as I tried to focus on book, my imagination flying rampant with the visions of intertwined limbs, shared fluids, the heavenly moaning as we succumb to temptation. I could feel a wet patch forming on my bikini, prompting me to close my legs as me an Matti waited out the afternoon.
As the cover of darkness drew, I found myself making an excuse to leave with Matti.
“We’re just going to the bar with our friend Gemma.” Innocent enough to make our parents not bat an eye. I thought about them as we walked through the marble-clad lobby, knowing that down the hall was a door leading to our complete degeneration.
Matti held my hand, uncertainty in his grip as we approached the door, for the first time in a while I felt an appropriate sibling affection in his grip, even if it was for the briefest moment.
He knocked on her door, and it took no time for it to creak open to reveal Gemma’s form. Clean and clad in a tight black tube dress, each curve and soft contour outlined indecently.
“Come in, I could barely wait.” She ushered us inside and sat back on her bed.
We stood awkwardly for a moment, unsure of what to do. We’ve never been in a situation like this before—sharing.
“Show me again, please?” Gemma leaned back on the bed, pouting teasingly, “I really want to see you two kiss.”
Matti’s eyes held Gemma’s gaze with a hint of contempt, her mocking and power-plays stirring a frustrated blush in his cheeks.
“Do you always treat your guests like this?” Matti shot back, his voice echoing through the luxurious suite, “Somebody needs to teach you some manners.” He continued, gripping my hand and stepping out in front.
“Oh, I sure hope so, big guy.” Gemma smirked, her narrowed eye briefly disarming Matti. They shined fiercely like gems against her black skin, and enticing mix of allure and challenge.
I felt Matti’s grip leave mine as he approached Gemma on the bed, Her curly black hair haphazardly tied back as she admired the muscles tensing with irritation under his shirt.
“You embarrassed my sister earlier, Gemma.” Matti’s hand descended onto the mattress next to her, his weight making her body shift backwards, losing balance as Matti brought his face close to hers, “So how about you apologise to us?”
I watched with baited breath as Matti battled against Gemma’s captivating, cocky aura, her smirk never waning. Her hand reached out to Matti’s torso, tracing a delicate path down to his abs to the waistband of his jeans.
“If it’s as big as it looked through those swimming shorts...” Gemma smirked, her voice dripping with playful arrogance as her fingers danced over Matti’s belt buckle. The teasing grip sent a shiver of anticipation racing through him. “Just think of the nice, sloppy apology I could give you, Matti,” she purred, her eyes glinting with mischief as they flicked toward me, a challenge hanging in the air. With a fluid flick of her wrist, her nimble fingers worked to unfasten his belt, effortlessly stripping away another layer, exposing his desire beneath.