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 Not for publication.
This story contains non-consensual incestuous sex. It's a fantasy. Generally, people wouldn't really act this way.
*****
KATE'S UNFORTUNATE INTERRUPTION
The light from the hallway burst into the still-dark room as the bedroom door flew open. Kathryn Thornton stood in shock, hand over her mouth in confused horror as her young son fucked her oldest daughter to what was clearly a mind-shattering orgasm.
Kate, as everyone called her, froze in place at the sight of her children. She had heard a ruckus and was concerned enough to throw on her bathrobe to check on the disturbance coming from her son's room.
When she knocked and no one answered, despite it sounding as if all hell was breaking loose inside, she broke her primary rule about her children's privacy and opened the door regardless.
She would wish she hadn't.
*****************************
Both David and Allison were rudely startled out of their ecstasy by the interruption of their mother. Rather than collapse in exhaustion, as he normally would after fucking the shit out of his big-titted older sister, David acted on survival instinct instead.
Getting caught boning Allison wasn't something he had rehearsed, or even thought about, so what happened next was simply the knee-jerk reaction of someone busted for doing something terribly wrong and acting on self-preservation...if that's what you could call it.
Subconsciously, David wasn't ready to give up the sexual nirvana between his docile sister's legs.
While Allison shrunk in mortification at their mother's discovery, regardless that she was truly an innocent victim forced into sexual servitude by her dominating brother, David wasn't so timid.
David took action.
Rising off the bed, the adroit wrestler lunged at his mother standing mortified at the doorway, too stunned to move in her defense. Grabbing Kate by the arm, David yanked her into the room and covered her mouth before she could get a word out.
"Shut up, mom!" He scowled ominously. "Just shut the fuck up and I'll explain."
Kate panicked. In all her years, she never expected to encounter such a sight.
Hyperventilating under her son's hand, she felt his nude body, especially his semi-erect cock, pressing against her thin robe as he dragged her over to the weight bench. David knew he needed to secure his mother and shut her up so he could explain.
"Allison, get to the bathroom and get a washcloth," he called to his sister, just now recovering her senses as David held their struggling mother tight.
Kate was small...really small, at 5'2" tall and no more than 105 lbs. She was easy to control despite the tremendous effort she put forth trying to break free of her muscular son's grasp. Their mother's eyes were alight with confusion as her naked daughter darted from the bed to the bathroom, returning with a washcloth.
"I'm sorry, mom, but you have to give me a chance," David implored, but without much conviction.
'Mmmuummh...mmh...,' Allison and David's mother issued muffled protests against her misguided son.
Kate wasn't looking for an explanation. Her mind was racing, consumed by the disgusting display she had just witnessed. She wasn't about to calm down.
David unclamped his mother's mouth long enough to stuff the soft cloth into her mouth and stifle her ranting. Allison, naked and afraid to cross her dictatorial brother, wisely seized the opportunity to pull the belt off her mother's robe and tie it around her mouth, effectively shutting her up.
'MMMNNPH...MUNNH...,' Kate's suppressed screams hardly escaped the cloth as she struggled, twisting and turning, and doing anything to free herself from her son's powerful grip.
That wasn't going to happen, but David decided he needed to take stronger measures until his mother ran out of steam and listened to his explanation.
It was a silly notion, of course. David knew there was no good explanation for dominating and fucking his sister, essentially turning her into his sex toy.
It was a Saturday morning and David figured his sister Brit had stayed at a friend's house, while his father was a heavy sleeper who slept late on the weekend.
David decided to take advantage of the straps and belts he had altered on his weight bench, using them to restrain his mom until she cooled down.
"Hold her legs, Allison," he barked at his sister.
David's depraved mind was already working in high gear. As he secured his mother's hands above her head, he couldn't help but notice the swell of her chest when her thin summer robe fell open, no longer secured by the belt.
*****************************
These days Kate Thornton was a socialite.
At 41-years-old, her life revolved around volunteering, tennis, shopping and drinks with the girls. Her husband George was an intellect but also a good provider, having built a world-renowned scientific consulting business - the kind that advised Presidents and business titans.
In her youth however, Kate had been an aspiring gymnast.
Her petite frame and dedication nearly led to a berth on the Olympic gymnastics team in the '92 Games. She had plenty of talent, and performed with the best of the other girls - for that's what they were, all in their mid-teens when female gymnasts peak.
Her only shortcoming was her generous bust.
Kate began to develop early and by 18, at the height of what would otherwise be her best years as a world-class gymnast, she was a good C-cup. On a girl standing barely 5' tall and weighing 80+ lbs., that was a substantial chest.
It sounds ridiculous to the uninitiated, but being so top-heavy threw off her equilibrium, and made the balance beam and other apparatus extremely difficult. She thought about breast reduction surgery, but her parents considered that too radical a step for a girl her age.
So, she never made the Olympics, but did become a top-notch collegiate athlete, where she met their father and retired to raise her family.
