The Offer
Copyright© 2026 by Tharnoren
Chapter 30
Incest Sex Story: Chapter 30 - College siblings Alan and Madison meet wealthy, provocative Rebecah at a wild night out. Her shocking offer—for them to indulge her taboo fantasy for cash—pulls them into a spiral of seduction, blackmail, and forbidden intimacy they can’t escape.
Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa Blackmail Coercion Consensual Romantic Heterosexual Fiction Incest Brother Sister Humiliation Light Bond Rough Group Sex Anal Sex Analingus Cream Pie Facial Masturbation Oral Sex Spitting Slow Violence Illustrated
Madison locked eyes with her little brother, her gaze piercing and almost feverish, as a thick, heavy strand of saliva slowly dripped from her parted lips onto the swollen head of Alan’s cock.
She lingered only on the tip, her rough tongue sliding with deliberate slowness over the sensitive crown.
Hmmmm ... A low, vibrating hum rose from her throat as her hot, wet tongue wrapped around the head, licking it in slow, lazy circles.
The moist heat of her mouth enveloped him instantly, scorching and almost suffocating.
That slightly textured surface rubbed against every sensitive nerve, making Alan twitch hard despite himself. He groaned, a deep, guttural sound ripping out of him without any control. He was completely lost.
Pleasure crashed through him in burning waves, but somewhere deep down a cold voice whispered the truth: he was loving every second of this. It was his own fucking sister, and he was letting her do it without any real fight.
Guilt knotted tight in his gut, yet he didn’t move an inch.
He still couldn’t understand what the hell was pushing Madison to go this far—was it the alcohol? The confusion? Or something darker he didn’t even want to name?
Madison suddenly sucked his cockhead with brutal force, her cheeks hollowing sharply. Slurrrp ... A filthy, wet sucking noise echoed through the silent apartment. She pulled him in hard, the hot, slippery pressure milking every nerve, then yanked him free with a sharp, obscene pop, thick strings of drool still connecting them.
“Ahhhh...” she breathed, panting, her voice thick and slurred. Alan stared, mouth hanging open, breath stolen, heart hammering like a war drum. “It’s ... it’s you ... your ... fucking ... big ... it’s all ... your fault ... Alan ... shit...” she mumbled, the words tumbling out in a drunken, broken mess—confused, accusatory, and lost all at once.
He shuddered violently, an electric jolt ripping from the top of his skull to the soles of his feet. Madison kept going, pressing his cock against her cheek and rubbing it slowly over the soft, warm skin of her face. She seemed to be playing with it, sliding the thick shaft along her jaw, pressing it to her lips. Schlick ... schlick ... Wet, sloppy sounds filled the air as she toyed with him, her tongue lapping greedily at the sensitive slit. She pulled back for a moment, mouth overflowing with spit and saliva, lips swollen and shiny, breathing in short, ragged gasps.
The contrast was insane for Alan—the enveloping heat of her mouth against the cool apartment air, the rough drag of her tongue scraping every ridge of his cockhead, the thick saliva dripping in hot, sticky strands, turning everything slick and viscous, sharpening every touch until the pleasure bordered on exquisite pain.
“It’s ... you ... always you ... fuck...” she muttered again, before her trembling hand grabbed his shaft and shoved it back between her lips. Alan moaned in raw pleasure, a desperate, broken sound tearing out of him.
“Madi ... fuck...” She started licking his cock from base to tip, her flat, broad tongue gliding slowly up the entire length in one long, wet schliiiiick, before taking him fully into her mouth again, deeper this time.
Madison took his cock deeper into her mouth, her lips stretched tight around the thick shaft, sliding down inch by inch until the swollen head nudged the back of her throat with a wet, choked gluck. She sucked him like a pro, with a brutal intensity Alan had never felt before—not even from the most experienced girls he’d ever been with.
Every movement was precise, ravenous: her rough tongue swirling around him while she sucked hard, creating a scorching, slippery pressure that made his teeth clench.
Slrrrp ... hmmmm ... gluck ... The sounds were filthy, obscene, swallowing the silence of the apartment whole. Alan couldn’t wrap his head around it. It was too intense, too fucking perfect. The slick heat of her mouth, the way her cheeks hollowed viciously with every pull, the thick ropes of saliva pouring down his shaft and dripping heavy onto his balls...
He groaned, hips jerking, completely drowning in it. She looked so goddamn filthy and hot like that. Kneeling between his spread thighs, her heavy, perfect tits swaying gently with every bob of her head, hard nipples pointing straight at him like they were begging for attention. Her gaze, blurred by the alcohol but still locked on his, short-circuited his brain.
Everything about it was wrong, dirty, forbidden ... this was his big sister, for fuck’s sake, yet it felt so insanely good his head was spinning. Between raw, broken groans, he muttered, voice cracked and hoarse: “Fuck ... you’re so ... good ... Madi...”
He still couldn’t believe how skilled she was. No girl had ever taken him like this.
Every hard suck, every slow drag of her tongue made his whole body shake.
Madison kept going, forcing him even deeper, her throat squeezing tight around his cockhead in a muffled gluck before she dragged back up to the tip and sucked hard again, tongue flicking wildly over the sensitive slit.
Slurrrp ... hmmm ... pop ... After a moment she pulled off, gasping for air, mouth hanging open wide, a long, thick string of drool still bridging her swollen lips to his throbbing cock. She panted hard, eyes glassy and unfocused, completely lost in the haze of booze.
“It’s ... it’s what you wanted, right...?” she slurred, the words tumbling out clumsy and tripping over each other.
“You big ... pervert ... you disgust me ... how can you ... do this ... to your own sister...”
Alan could barely make sense of what she was saying; everything came out jumbled, chopped up by the alcohol. Suddenly soft sobs started spilling from her, silent tears sliding down her flushed cheeks. His cock still rested against her face, and she kept licking it slowly, almost on autopilot, her hot tongue gliding over the head while the tears fell.
“Forgive me ... A-Alan ... hmmm...”
She sucked him gently, a slow, wet schlick, tears still streaming.
“I never should’ve ... hmmm...”
She kept at it like that, switching between soft little laps of her tongue and light, needy sucks while she cried.
“You f-forgive me...? I’m the worst big sister ... hgmmgm...”
Alan stayed frozen, unable to process any of it. His big sister was right there on her knees, quietly crying while she kept licking and sucking his cockhead with this desperate, almost tender hunger, her tears soaking his shaft and mixing with her spit.
It was too twisted, too confusing, and yet he couldn’t move a muscle, completely paralyzed by the sight.
Madison kept licking his cockhead in slow, deliberate strokes, her hot, rough tongue gliding over the sensitive skin with wet, lazy schlicks while silent tears slipped down her flushed cheeks. Alan slid a gentle hand over the top of her head, fingers threading through her tangled hair, stroking slowly like he was trying to soothe her.
It was fucked up—completely, twistedly fucked up—but he was doing his best to calm her, his voice raw and broken.
“It’s okay, Madi ... it’s nothing ... fuck ... goddamn...” She sucked softly on the head, blowing little bubbles of spit that popped against his skin in tiny, wet, obscene plops. Thick saliva poured everywhere, hot and sticky, running in heavy rivulets down his shaft.
“I ... I forgive you ... hmm yeah...”
She lifted her eyes to his, those big, wounded puppy-dog eyes shining with tears, pleading and completely lost. It was too fucking hot. Alan felt his chest tighten and his cock throb harder inside her mouth. Madison slowly pulled his dick from between her lips, leaving a thick, heavy rope of drool stretching from her open mouth to the glistening head.
“It’s ... it’s true?” she whispered, her voice thick and slurred, completely hammered.
Alan stared down at her, unable to look away. She was waiting for an answer, tears still streaming.
“Uh ... yeah ... I forgive you, Madi...”
She started crying softly again, letting his cock slip free so it stood straight up, aching and throbbing painfully against her face. And then she launched into a confused flood of words, everything tumbling out in a messy rush like she couldn’t stop herself.
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