Disclaimer: This story is fictitious and so are the characters. All characters are 18-years-old or older. In real life, all non-consensual sex is immoral and illegal, and not condoned by the author. Not for publication.
Part 01 of this story is in the Incest/Taboo section. I've moved the story to the Non-consent/Reluctance section because I received a lot of complaints it was in the wrong section. I'm okay with that, but can't change it. If INCEST bothers you, don't read this story. This story is a fantasy. It contains NON-CONSENSUAL INCESTUOUS SEX. You've been warned.
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For a moment, both David and Allison stood quietly in his bedroom, with Allison solemnly staring at the floor as she bent her head in stunned silence at her situation. In her fear and confusion, she did nothing to cover her bare body from her younger brother's eager eyes.
David gawked in disbelief at Allison's nudity, incredulous he had forced her surrender to this degree with only a modest amount of physical intimidation, and increasingly curious as to just how far he could go in disgracing his older sister.
Unlike Allison, David was still a virgin, and while he had experienced fumbling gropes of girl's breasts in the back seat of cars while in high school, he had never had a girl standing before him completely undressed in all her glory...even if it was his superiority-fixated sister.
What he did know about sex he had learned from the vast variety of porn videos he had watched online since adolescence. He practically studied them.
While he'd never had the opportunity to do any of the things they depicted, he had paid attention, developing a comprehensive knowledge of sexual control and coercion techniques he swore he'd use someday...if he ever got the chance.
Today was that day.
David had to admit, Allison looked better than he'd expected, even having seen her traipse about in only a towel or her one-piece bathing suit. Her alabaster skin was unmarred by sun, freckles or any blemishes, consistent with her lack of outdoor activities.
Allison's wide shoulders slumped in her submission to her brother, but her substantial tits were prominent nonetheless, suspended with a gentle slope. They were clearly dense with gland, and not at all fat, affording them a firmness only naturally large breasts can bear.
The science prodigy's frame was sturdy, with her torso slimming downward to a pleasant waist and just a subtle layer of padding covering her stomach muscles, before flaring out to very womanly hips. In the center of her pelvis lay a tangle of brunette pussy hair, matted by her recently strewn panties, but otherwise dense and unkempt. The thick bush completely obscured her womanhood.
All these quite feminine features rested atop two shapely and slender legs of average length tapering to her ankles. Even with her lack of attentiveness to her appearance it was easy to see Allison was nonetheless attractive, possessing a killer body that would dress up nicely if she ever tried.
David certainly noticed as he appraised his nonresistant sister standing dazed before him. His interest was evident in the way his cock continued to swell, pushing against the cotton fabric of his briefs, as noticed by his befuddled older sister.
'This is too good to pass up. I didn't think she'd cave so easily,' the beaming teenager congratulated himself, but realized the need to keep the pressure on. "I've got to take advantage before she snaps out of it. I've got to keep her down.'
David's growing lust clouded out the fact it was his sister he was ogling with such interest. In truth, on a subconscious level, that it was his sister made it much more enticing...and forbidden.
Allison had always lorded over him, but she was hot, in a geeky sort of way, and he had her just where he wanted -- flummoxed and flustered. He planned to drive forward, grind her down until she yielded completely, humiliated and totally at his will.
'It's payback time for my bitchy big sis,' he decided, and his perverted mind began to think of the most demented and taboo ways to enjoy his retribution.
The momentary lull admiring his sister's body...and how best to use it, quickly passed when David boldly barked out an order to Allison.
"Look at me, Allison! Stand up straight, pull your shoulders back,' he instructed commandingly. "Push out those big tits!"
David's voice was unwavering and commanding, seeking to maintain a tone of superiority, while not allowing her a glimpse of hope. He intended to convey a sense he was completely in charge in every way to force her to bow to his authority.
When she didn't respond immediately, trapped in her despair at her seeming inability to escape her brother's lair, David gave her an alarming wake-up call to send the message.
'SMACK!' David's right hand landed open-palmed along the side of her left breast with a hard slap echoing throughout the room.
"AAAWWWWHHHH!!"
The pain rocketed to Allison's brain like a missile as her big left jug smashed into her right, sending both ample melons bouncing wildly side-to-side from the blow. She instinctively raised her arms to protect her sensitive mounds from any further strikes.
"You're not listening, Allison!" David screamed. "Straighten up, and stick those big white tits out. I wouldn't want to have to slap them again!"
David wasn't kidding around, reasserting his dominance and demanding her obedience. He still stood between her and the door, so Allison knew she wasn't going anywhere.
Quickly snapping to attention, the beleaguered teen genius drew back her shoulders and pushed out her bodacious tits, with the imprint of David's hand marking the outside of her reddened left breast.
Allison focused her attention on her brother as he required, identifying a terrifying look in his eyes that was dangerous; a look that spoke of revenge, and more frighteningly...lust.
"You need to get your shit together, Allison," he warned angrily.
"I'm in charge here. Mom and Dad aren't around and nobody will be home for hours," he advised. "Be a respectful girl, do what you're told and I won't have to correct you."
Allison took her domineering brother's threatening words to heart. She was becoming more certain with each demonstration of his cruelty that he would do just that, and much more, to keep her in line.
"Now, let me check these out, make sure there's no permanent damage," her wide-eyed brother said with false concern. "I'd really hate to ruin an incredible set of tits like these, sis."
With the remark, David brazenly cupped his right hand under Allison's recently abused left breast and lifted, pretending to examine the heavy melon for injury, but instead greedily gauging its size and weight.
"Uhhhhh...!" A withering chill rolled through Allison's nude body at the untoward touching by her brother, causing her to shiver involuntarily with his inappropriate familiarity with her breast. Still, she resisted the impulse to pull back, instead granting David the unnatural privilege of feeling her large mammary.