Motorboating Harpers big tits pt.2

Liam can't get enough of his sisters bit tits

The following story is fictional and does not depict any actual person or event

My sixteen year old twin sister Harper was stretched out on her bed, thumbing through her phone, completely oblivious to the way her oversized t-shirt had ridden up to expose the soft swell of her lower belly. She shifted slightly, the fabric pulling tighter across those ridiculous D-cups that had sprouted overnight a few summers ago—so absurdly large on her tiny frame that she had to special-order bras from penningtons. My throat went dry watching the way they moved under thin cotton, heavy and unrestrained.

The afternoon light caught the dusky peaks of her nipples pressing against the shirt, hard enough to outline every ridge and divot. I could practically feel them between my own fingers—that unexpected firmness giving way under pressure, the way they'd stiffen further when—"Jesus, Liam" Harper didn't even look up from her phone. "You're staring like a creep again."

Her bare foot nudged my thigh, toes curling against my jeans. The casual contact sent a jolt through me, equal parts shame and something hotter, darker. My dick twitched in my pants. Fuck. She smelled like vanilla body spray and the faint musk of sweat, that adolescent tang that clung to her even after showers.

"Sorry," I muttered, but my gaze dragged right back to her chest. Boobs weren't supposed to be this hypnotic. Especially not hers. The shirt had slipped further, revealing a sliver of lace-trimmed bra—pink, because of course it was. Everything Harper owned was aggressively girly, as if she could balance out the obscenity of her body with enough ribbons and glitter.

She caught me looking again, her arms crossed over her chest defensively—a reflex ever since seventh grade when boys started tripping over themselves to "accidentally" brush against her in the hallway.

"What?" she huffed, tossing her phone aside, her bracelets jingling like a cat's bell. "Go find some porn to jerk off to or something. Jesus."

The way her lips pursed when she was annoyed made them look even puffier—pillowy soft, the kind of mouth that couldn't help but look like it was waiting to be bitten. I dragged my fingertips along the seam of her comforter instead, feeling the cheap polyester catch on my calluses. "Not my fault you're built like some hot anime girl," I muttered, half-hoping she wouldn't hear.

Harper's knee jerked up abruptly, almost hitting my wrist. "Oh my god, you are *such* a fucking pervert." But she didn't scoot away—if anything, her thighs parted slightly, the worn fabric of her panties riding up to expose the puffy flesh of her pussy mound.

I didn't know what to stare at more—her tits or her pussy. The shirt had slipped completely off one shoulder now, her left breast threatening to spill from the stretched-out bra cup.. But lower, the outline of her lips pressed tight against the thin bikini fabric—her vulva puffier than I'd imagined, the seam of her panties digging slightly into pale flesh. She'd barely started growing pubes, just a faint golden dusting barely visible through the nylon.

Harper exhaled sharply through her nose when she caught my gaze lingering—but she didn't close her legs. Instead, she shifted her weight, pressing down on the mattress deliberately. The fabric rode higher, the damp heat between her thighs making the material cling obscenely. I could see every fold now—the way her outer lips swelled slightly where they met the crotch seam, the faintest shadow of moisture darkening the fabric.

"Aren't you supposed to be grossed out by me or something?" she muttered, but her voice wavered when my knuckles brushed her thigh accidentally-on-purpose. The skin there was impossibly soft, still carrying that childish plushness, yet the heat radiating from her crotch was unmistakably adult. Her panties were glued to her now, the nylon straining to contain the swell of her labia—the outline so pronounced. A wet spot bloomed slowly, darker at the center where her slit kissed the fabric.

Harper's breath hitched when my thumb traced the lace trim of her bra, skimming the underside of her breast where the weight of it pulled the skin taut. My palm cupped one experimentally, and the gasp she made wasn't annoyance—it was surrender. Her back arched instinctively, pressing into my touch like a cat begging for scratches.

The reality of her flesh was better than all my stolen glances—warm and impossibly heavy, the nipple hardening against my palm through the cotton. When I squeezed, just to feel the give of her, Harper whimpered, her thighs clamping around nothing. The weight was dizzying—so much fucking flesh for such a tiny ribcage—. The wet spot had spread, her arousal obvious even through the layer of fabric. Her breath hitched when my fingers found the clasp of her bra—three quick fumbles before it gave way.

The bra slid off her shoulders with a whisper, and suddenly there they were—full and heavy, swaying slightly with her rapid breathing. Pink nipples puckered tight, the areolas flushed dark pink.

My sister gasped, but she was a brave girl and resisted the urge to cover herself with her hands. She let me look.

We were both silent for a moment, as I took it all in, my 16 year old sister got over the shock of being exposed to her twin brother.

She just watched me, lips parted, her fingers twisting in the sheets. "Happy now?" she breathed, but her voice cracked halfway through.

Her skin was pale and unblemished, like freshly fallen snow, and it glowed faintly in the moonlight that streamed through the gap in the curtains

Her breasts were big, D-cup size according to her bras, firm and perfectly shaped, but looked much bigger on her frame standing robust and proud with nipples the size of twonies, hard and pink as if they were begging to be fondled.

Reaching out, I lightly traced the line of her collarbone, feeling the delicate bone structure beneath her smooth skin.
Her breath caught and her eyes closed, a soft moan escaping her lips as my fingertips danced downward to the swell of her large breasts.

Their softness was like nothing I’d ever felt before, and I was surprised at the surge of desire that shot through me as I cupped one in my hand, squeezing it, feeling its weight, the hard nipple pressing against my palm like a tiny, insistent nub.

Her skin was hot and she quivered at my touch, her body arching slightly towards me.
I watched as her chest rose and fell faster, her large breasts moving with the rhythm of her breath.

My thumb brushed over her nipple, and she gasped, the sound sending a jolt of pure electricity through me.

I dragged my thumb across her nipple, feeling it pebble instantly, the skin around it tightening into gooseflesh. When I pinched lightly, Harper arched off the bed with a choked noise—not pain, but something sharper, hunger mixed with shock.Her tits jostled with the movement, the weight of them making her sway slightly even as she tried to stay still.

My eyes followed the curve of her hips, down to the juncture of her thighs, and my breath caught in my throat as I saw the soft, downy hair that I hadn’t noticed before, peeking out from her panties.
The fabric was damp with her arousal, and I could feel the heat emanating from her, a temptation to my own pervy desires.

Her pussy had to be dripping by now; I could see the wet spot from her arousal spreading through her panties in real time, the fabric turning translucent where it clung to her slit and the scent of pussy filled the room, sweet and intoxicating.
My dick ached so badly I had to adjust myself, the denim rough against my erection.

When I rolled her nipple between thumb and forefinger, Harper made this sound—half-gasp, half-groan—that shot straight to my balls. Her whole body jerked like I'd shocked her, but she didn't pull away instead she arched her back pushing her tits up into my palms. "Fuck," she whispered, eyes wide like she'd surprised herself.

The weight of them filled my hands perfectly, warm and yielding yet firm enough to resist my grip. I dragged my fingertips down the underside, fascinated by how the skin there was softer somehow. Her nipples darkened to a deep rose when I thumbed them again, the areolas pebbling under my touch.

I leaned closer, my mouth watering at the sight of her taut, pink peak.

Harper made a broken noise when I leaned down to lick one—just a quick swipe that left her shuddering. The taste of her skin shocked me—salt and vanilla body spray and something uniquely adolescent, that musk barely masked by soap.

Her nipple stiffened against my tongue instantly, the texture unexpectedly rough against the softness surrounding it.

Without thinking, I brought my other hand up to her chest and placed my lips around her areola, suckling gently at first, then increasing the pressure until she was squirming beneath me. I sucked experimentally, Harper’s hips bucked off the mattress, her fingers scrabbling at my shoulders like she wasn’t sure whether to push or pull.

Her nails dug into my shoulders, urging me on, her body lustful with need.
The sound of her moan was like music to my ears, and I knew that I had to give my 16 year old sister more.

Her D-cup tits were like pillows to my face, burying me in softness and warmth.
I flicked my tongue over her nipple again and she cried out, arching her back further, pushing her chest into my mouth.

Moving my hand away, I took a moment to appreciate the beauty of her young breasts before bringing my mouth back down to her tits.

The tip of my tongue flicked against her nipple, teasing it into hardness before wrapping my lips around it and sucking gently. Harper gasped, her hands clutching my hair as I alternated between gentle nibbles and deep pulls, my saliva making her skin glisten in the dim light. Her breathing hitched when I switched to her other nipple, her body arching off the bed as I dragged my teeth lightly across the sensitive tip.

This time, I didn’t just suck on her nipple; I used my tongue to tease the sensitive flesh around it, tracing circles and swirls that made her hips buck against me.
The sensation was exquisite, her skin like velvet beneath my lips, and I felt a thrill of power knowing that I could make her feel this way.

Harper’s breathing grew ragged, her fingers tightening in my hair as she whimpered softly, her body writhing beneath me in a mix of pleasure and uncertainty.
The scent of her arousal grew stronger, mingling with the faint sweetness of her shampoo, creating an intoxicating aroma that made my head spin.

I slid my tongue over her nipple, feeling it pebble even further, then took it into my mouth again, this time adding a flick of my tongue for good measure.
Her grip on my shoulders tightened, and she let out a guttural sound that was half moan, half growl.

The damp heat between her thighs pressed against my forearm as I shifted position, the fabric of her soaked panties clinging obscenely to her swollen folds, and I could feel the slickness seeping through to my skin.

Emboldened by her response, I placed my other hand on her other breast and began to knead and pinch her nipple between my thumb and forefinger, rolling it gently as I continued to suck on its twin.

Her skin was impossibly soft, the flesh beneath it firm yet yielding, the nipple a hard knot of sensitivity against my tongue.

With a sudden surge of passion, I buried my face between her beautiful breasts, my cheeks pressing against the soft, supple flesh as I began to mimic the motion of a motorboat’s engine—humming loudly, vibrating my lips against her skin while my nose nudged the underside of one plump tit. Harper's breath quickened sharply, her fingers scrambling against the sheets, her entire body tensing as the absurdity of the act collided with the unexpected pleasure of my hot breath and the ticklish buzz against her hypersensitive skin. A high-pitched giggle escaped her lips, the sound teetering between amusement and arousal as her nipples hardened further against my hands.

My breath was hot and fast, and the sound of her gasps and moans grew louder with every pass of my mouth over her sensitive skin. The vibration of my lips against her soft flesh sent shivers down her spine, her fingers twisting in my hair as she arched into the sensation—her breasts pressing flush against my face, the scent of her sweat and vanilla lotion filling my nostrils.

The vibration from my cheeks and the sucking motion of my lips had Harper squirming and begging for more, her hands clutching my head with a strength I didn't know she had. She arched her back sharply, pressing her tits harder against my face, breath ragged as she gasped out, "Oh god oh god—Liam, don't stop!"

My cock strained against my pants, hard and desperate for release, but I held back, focused on her pleasure, my tongue flicking out to taste the sweetness of her skin.

The soft flesh of her breasts enveloped my face as I continued my motorboating, the sound of my wet lips vibrating against her skin filling the small bedroom. Harper’s hips rolled restlessly, her thighs squeezing together as if she could trap the sensation between them—her panties soaked through now, the scent of her arousal thick enough to taste.

Her hands found their way into my hair, guiding me, her body moving in sync with my rhythm.She pulled me deeper into her soft flesh, and I complied eagerly, my lips pressing firmly against the cleavage of her breast before movibg to her nipple, capturing it in my mouth with a wet, sucking sound. The vibration of my motorboating had morphed into something slower, more deliberate—my tongue swirling around her areola, my lips tugging gently at her sensitive flesh.

The feeling of her breasts pressing against my face, the way her chest heaved with every breath she took, it was all so incredibly erotic.

Her fingers tangled in my hair, gripping tightly as she pushed my face deeper into her cleavage, her body writhing beneath me. The softness of her skin, the heat radiating from her, the way her nipples brushed against my cheeks—it was overwhelming.

Her nipples had turned a dark shade of pink, standing out against the pale background of her big tits, and I could feel the wetness of her desire seeping through her panties.

My mouth moved lower, trailing kisses down her ribcage while my fingers traced the faint stretch marks along the underside of her breasts—imperfections that made her somehow more real, more intoxicating. Harper shuddered when my lips brushed the dip of her navel, her stomach muscles tensing beneath my tongue in a way that made her breath hitch. The scent of her arousal was stronger here, mingling with the soapy freshness of her skin, and I lingered just above the waistband of her panties, breathing her in like a man starved.

Suddenly, she pushed me away, her chest heaving, and I thought I had gone too far.
But then she looked up at me with a fiery gaze, her pupils dilated with lust, and she whispered, “Take off your pants.”
With trembling hands, I obeyed, revealing the hardened length of my eight inch cock that had been straining against the fabric for what felt like an eternity.
Her eyes widened as she took in the sight of me, and she licked her lips, a wicked smile playing on her mouth.

She reached out tentatively, her fingers brushing against the sensitive skin of my shaft, sending jolts of pleasure shooting through me.
Her touch was hesitant at first, but as she wrapped her small hand around my cock and began to stroke, her confidence grew.
The sensation was almost unbearable—her grip tight yet gentle, her fingers soft and inexperienced but eager.
I groaned, my hips bucking involuntarily into her hand, desperate for more of her touch.

Harper bit her lip, watching my reactions carefully as she experimented with different speeds and pressures.
Her movements were awkward at first, but soon she found a rhythm that had me gasping, my cock throbbing in her grasp.
She leaned forward slightly, her large breasts pressing against my thighs as she stroked me, the warmth of her skin sending sparks of pleasure through my body.
The sight of her—so innocent yet so wanton—was almost enough to push me over the edge.

Her grip tightened slightly, her thumb brushing over the slick head of my cock, spreading the precum that had gathered there.
The sensation was electric, and I groaned, my hands clenching in the sheets beside me.
She looked up at me with wide eyes, her breath hitching as she realized just how much power she held in her small hands.
A mischievous smile curled her lips, and she leaned in, pressing her soft breasts against my shaft, the warmth and weight of them making me shudder.

The friction of her skin against my cock was intoxicating, the softness of her tits contrasting with the hardness of my arousal.
She squeezed her breasts together, trapping my cock between them, and began to move up and down slowly, her nipples brushing against the sensitive underside of my shaft. Her cheeks flushed pink with exertion, her lower lip caught between her teeth as she focused on her task, her movements growing more confident with each stroke.

Precum dribbled from my tip, smearing across her cleavage in glistening streaks, her skin slick with the evidence of my desire.
She gasped when she felt the warmth of it against her flesh, her eyes darting down to watch it coating the valley between her breasts, glistening under the faint light filtering through her curtains.

Her grip tightened instinctively, pressing her tits tighter around my cock, the wetness making each slide smoother, hotter—her nipples brushing the underside of my shaft with every upward stroke. Harper’s breath hitched as she watched the viscous strings of pre-cum stretch between her skin and my tip before snapping, leaving glistening trails across the flushed swell of her cleavage. She shuddered—not from disgust, but something darker, her tongue darting out to lick the dribble of pre-cum leaking from the tip of my cock.

The taste made her pause—salty, bitter—and her nose wrinkled slightly before curiosity won out. She leaned he head forward, lips parting hesitantly, her breath warm against the swollen head. The first tentative lick was feather-light, barely there, but the way her tongue dragged along the slit—experimental, curious—sent a violent shudder through me. Her eyelashes fluttered when she realized what she’d done, her lips shiny with saliva and pre-cum.

Harper squeezed her breasts tighter around my cock, the slick heat of her skin dragging me closer to the edge with each stroke. Her movements quickened—less tentative now—her D-cups jiggling with the rhythm, the soft flesh yielding just enough to make each thrust feel engulfing. The friction was unbearable, her nipples scraping deliciously along my shaft, her panting breaths hot against the tip.

Pre-cum spilled freely now, pooling in the cleavage between her tits, the sound obscenely wet as she pistoned her titties faster. Her lips parted in concentration, her lower lip caught between her teeth—that same pouty look from childhood, now twisted with something darker.

The pressure coiled low in my gut, sharp and inevitable.Her D-cups squeezed tighter around my cock, engulfing me in that impossible softness—like sinking into warm velvet, the friction so smooth it was almost unbearable. Harper’s breath hitched when she felt the first pulse, her grip faltering as my cum splattered across her collarbone in thick, uneven stripes. The second spurt painted her chin, her lips parting instinctively—catching a droplet on her tongue before she could think better of it.

She froze, the taste blooming across her tongue—bitter salt and something muskier, thick enough to coat the roof of her mouth. Her gaze flicked up to mine, pupils blown wide with shock, her cheeks still flushed pink from exertion. A single strand of cum accumulated across her lower lip.

Pearl-white streaks of cum glazing her lower lip like melted sugar, Harper"s tongue darted out instinctively—once, twice—cleaning herself with slow, uncertain laps. The bitter-salt taste lingered, making her nose wrinkle slightly even as her thighs squeezed together reflexively, the soaked fabric of her panties riding up further into her slit with the movement. She swallowed my cum, her fingers still clutching her own tits where they’d been pressed tight around me—now sticky and glazed, the slick heat of my release cooling rapidly against her skin.

Her grip loosened around my cock, my shaft sliding free from the warmth of her cleavage—still pulsing faintly, dribbling the last weak spurts onto the rumpled sheets beneath us. Harper stared at the mess she'd made, her breath coming in shallow, uneven bursts—her nipples pebbled tight under streaks of cum, her panties clinging to her pussy in a way that left nothing to the imagination. She touched her lower lip with two fingers—smearing the residue there—then looked at me with an expression caught between horror and fascination. The scent of sex thickened the air between us, mingling with the vanilla body spray and something sharper, muskier, that clung to her skin now.

She grabbed her discarded shirt from the foot of the bed—the same oversized tee she’d been stretched out in earlier—and wiped at her collarbone where the cum had splattered. The fabric dragged wetly across her skin, smearing rather than cleaning. She wiped her breasts next, dragging the shirt between them with a shudder as the damp cloth caught on her still-stiff nipples.

Harper gasped when she saw the translucent streaks left behind on the fabric—my release mixed with her sweat, the faint musk unmistakable. Her fingers trembled slightly as she bunched the shirt into a tight ball and tossed it toward her hamper—it landed halfway, crumpled on her bedroom floor like a guilty secret.