The Offer
Copyright© 2026 by Tharnoren
Chapter 11
Incest Sex Story: Chapter 11 - 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
Rebecah didn’t lift her head right away, her tongue keeping at its deliberate pace, lapping broad strokes over Madison’s sex that sent tremors racing through her entire body. Without warning, she slid two fingers deep inside, curling them to grind against that sensitive spot, building a steady rhythm that swelled like an unstoppable tide.
Madison gripped the sheets until her knuckles went white, staring fixedly at the ceiling, trying to tell herself this was purely physical, just for the money—but fuck, it felt incredible, overwhelmingly so, and she could already feel her body giving in, her hips lifting subtly to meet each thrust. Rebecah pulled back for a moment, her lips glistening.
She took one nipple into her mouth, sucking hard, grazing it lightly with her teeth before moving to the other, all while resuming the fingering—deep, relentless, for what felt like an eternity, maybe five minutes of unyielding pumping that stoked an unbearable heat coiling low in Madison’s belly. She fought to hide it, to hold back—biting her lip, turning her face away from Rebecah’s triumphant gaze.
But it was no use; when that mouth returned to her pussy, licking relentlessly, devouring the slickness that betrayed her no matter how she tried to stop it, a rough moan tore from Madison’s throat, low at first, then louder, impossible to swallow down.
Her body arched under the persistent onslaught of that tongue, utterly surrendered, at the complete mercy of Rebecah who was forcing this unexpected pleasure on her—raw and overwhelming in its force.
Alan sat close on the edge of the bed, watching in silence, his eyes tracing the intertwined bodies of the two women. His gaze lingered on the curve of Rebecah’s arched back, on her perfect ass swaying with each motion, then shifted back to Madison—her back bowed, breasts heaving, thighs spread wide and quivering under the precise flicks of tongue.
He barely moved, hardly breathed, completely mesmerized.
Madison turned her head, desperate for something to cling to in the chaos, and met his eyes. Goddamn it, Alan, she thought, a deep shame burning across her face even as the pleasure surged higher. Here she was, crumbling under this girl’s touch, hating the ecstasy even as she craved it—and he was staring at her with that stunned look, a mix of shock and an arousal she didn’t want to acknowledge.
His eyes would drift to Rebecah bent over her, but they kept returning to Madison’s chest, to her glistening sex exposed beneath that hungry mouth, lower still ... He took it all in, absorbed completely. And then, inevitably, Madison’s gaze dropped lower, to his cock—rigid and throbbing against his stomach.
The humiliation hit her like a punch; she shot him an accusing glare, almost pleading for him to stop staring. But he didn’t react, just sat there watching them both as if time had frozen.
Then, almost instinctively, Alan wrapped his hand around his shaft, gripping it tight, and began stroking slowly, eyes never leaving the scene. That pushed Madison over the edge.
Between the moans she could no longer control, she spat out in a broken, disgusted voice: “What the fuck are you doing? Stop that right now!” ---
Alan let go of his cock instantly, as if it had scorched him, his hand dropping limply onto his thigh. Heat flooded his face all the way to his ears; he stared down at the rumpled sheet, suddenly aware of how absurd this all was—fuck, what the hell had he been doing?
“Shit...” he muttered under his breath, voice choked with embarrassment.
Then he lifted his eyes to Madison. Their gazes locked for one raw, shame-filled second.
“ ... I ... fuck, sorry.”
Rebecah lifted her head from between Madison’s thighs, lips slick and shiny, a playful smirk tugging at the corners of her mouth.
She let out a low, almost mocking laugh.
“Oh, I’d almost forgotten you were over there, you’re so quiet,” she said breathlessly, fingers still tracing slow, teasing circles over Madison’s soaked pussy—just enough to keep her trembling on the edge. She turned toward Alan, triumph flashing in her eyes.
“Come behind me. Lick my ass.” Alan froze for half a heartbeat, brain short-circuiting at the blunt command. He risked a glance at Madison—she was staring at him, pupils blown wide, a mix of disgust and silent pleading that twisted his gut—but he didn’t linger on it.
Something snapped inside him, something raw and unexamined.
He shifted across the bed, kneeling behind Rebecah as she arched deeper, presenting her round, firm cheeks like an unmistakable invitation.
His tongue brushed her asshole first—tentative, barely there—and she jolted, a guttural moan rumbling out of her that vibrated straight into Madison’s clit. Rebecah laughed again, low and proud, mouth still tasting of Madison’s arousal.
The sound spurred him on. Alan pressed in harder, lapping openly now, pushing his tongue inside to explore, hands gripping her ass cheeks and spreading them wide. He’d wanted this without admitting it, ever since he’d watched that perfect ass sway in front of him—and now he devoured it, growling against the hot skin despite himself, wet, filthy sounds filling the room, impossible to hold back.
Madison heard everything: Rebecah’s muffled moans as she dove back onto her pussy with renewed hunger, Alan’s low grunts behind her, the syncopated rhythm that made the mattress shake. Then moments of dead silence—heavy, suffocating—when the full horror sank in: her own brother eating this girl’s ass while the girl ate her, tongue plunging deep without shame, fingers digging into flesh.
The scene was intoxicatingly obscene, unthinkable—a twisted tableau that turned her stomach even as it stoked a treacherous heat low in her belly, shame gnawing at her just as fiercely. ---
Then it hit her, sudden and savage, a crashing wave that swallowed her whole without warning. Madison’s hands fisted in Rebecah’s hair, pulling hard, the sheets bunching under her body as it bowed violently off the bed. A raw cry tore through the room—she came, the fiercest orgasm of her life ripping through her in relentless surges, her inner walls clenching tight around the fingers and tongue that refused to relent, drawing out the exquisite torment.
Alan jerked his head up on instinct, mouth still slick, eyes wide as he stared at Madison convulsing beside him—back arched high, eyes rolling back, lips parted on that endless, guttural scream.
He watched her, transfixed, the rest of the world fading for a moment, his heart slamming against his ribs.
Rebecah, smug to her core, finally eased off, letting Madison drift down slowly with feather-light strokes along trembling thighs, lazy laps of her tongue that still wrung aftershocks from her spent body.
Then she slithered up the sweat-damp skin, claiming Madison’s mouth in a deep, hungry kiss—lips and tongue still coated with her release. Against every instinct, Madison kissed back, parting for her, seeking her tongue in a dazed, desperate tangle, body still quivering in the hazy aftermath where nothing made sense anymore.
Rebecah took full advantage, deepening the kiss, owning it without force, reveling in the complete surrender.
She pulled away at last, lips swollen, and turned to Alan with a wicked smile, dark mischief gleaming in her eyes. Wordlessly, she trailed her fingers one final time through Madison’s soaked folds, coating them thickly in her slick arousal, then crawled toward him on all fours.
She lifted her hand, opening her mouth in an exaggerated “aaaah,” glistening fingers hovering at his lips.
Alan barely hesitated—a flicker of an eyelid—and leaned in, taking them into his mouth, sucking greedily at his sister’s essence, tongue swirling to lap up every trace, the sharp, intimate tang flooding his senses.
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