Lately, vivid visions of the naked men she saw in her 'Playgirl' magazine would float through her mind as her fingers worked their familiar magic and sent her ever higher toward that wonderful orgasmic release.
Sometimes, she would picture herself with them, doing the things that her friends so openly talked about doing with their own dates and boyfriends.
Her hand would slip down under the elastic waistband of her panties and her middle finger would delve down between the folds of her oily wet pussy. Kristy would slide her finger quickly deep down, in and out of her slippery cunt hole, as the teenage girl imagined that it was a boy's cock that was penetrating her fuck hole and making her feel so good. With her middle finger plunging in and out of her pussy, she used her thumb to rub over her clit. The combination was indescribable, and it quickly made her climax. Sometimes, once just didn't satisfy her, and two fingers would slide in and out between her wet, slippery pussy folds a second time, sending her to even greater orgasmic heights.
After she finally came, Kristy would often lay contentedly on her stomach, her hand still inside her panties cupping her pleasure place as the teenage girl wondered if that was really how it felt to have a guy's cock plunging in and out of her pleasure place.
Now, Kristy's breath was shallow and rapid as she gazed through the slightly open door at the sexy scene in her mother's bedroom and masturbated, her legs beginning to feel weak and rubbery with her building excitement. As she leaned against the door frame to support herself, the door swung opened a little farther, and her thighs moved more apart so her fingers could press harder up into her slit. Her drooling cunt was soaking through the crotch of her panties and made the material feel slippery to her erotic touch.
"Oh, God, this feels good…" the girl heard her mother whimper as the woman arched her back to meet her brother's thick, hot, penetrating shaft.
"You're the best, sis," her uncle replied in his deep, mellow voice, his ass pumping constantly up and down like a machine, his cock shafting into the women over and over again. "Ever since we were kids, you've always been the best…"
Ever since… Jesus Christ!
The meaning came crashing through the haze of pleasure building in her body. God, that means they've been doing it since they were kids, Kristy thought, maybe even as young as me; maybe even as young as Eric…
A vision of her little brother, wearing just his white underwear briefs, flashed in the girl's head. In her mind she could picture his little boyish cock, hard and straight, pushing out against the front of his white underwear as he walked around the apartment. As her pleasure quickly grew between her thighs, she began to imagine what it would look like if he wasn't wearing any underwear; if he was naked; if he was….
She closed her eyes and imagined the exciting and forbidden scene in her mind as her fingers moved harder and faster against her panty-covered mound. From experience, Kristy knew how much pressure to apply and just where to apply it. She could feel the thick, intense pool of pleasure building between her legs just waiting to explode throughout her body.
The fifteen-year-old girl felt the musky wetness from her pussy flooding the crotch of her panties as she fingered herself, driving her body toward that ultimate release of wonderful sensations.
The slapping of the two adult bodies echoed more loudly in the bedroom.
Through the partially open door Kristy watched her uncle pick up the tempo of his fucking, his loins smacking against the firm and shapely up-turned ass and pussy of her mother. The women's slender legs seemed to be squeezing and climbing the man's body as he held himself above her, his cock plunging again and again into her sweet soft spot.
"Let's do it another way…I wanna be on top," she heard her mother say.
"You do, huh? God, you've always liked that position the best, ever since we were kids."
"That's because that's the way we did it the first time, remember?"
As the two adults talked, Ted laid down on his sister, his long, swollen shaft still embedded between her legs, and rolled over onto his back, taking her body with him. The change is position was accomplished smoothly and effortlessly, as if they had done it many times before.
Kristy's mom ended up on top, straddling his hips and sitting down fully onto her brother's cock. Right away she leaned forward, placed her hands on the man's upper chest and, using her legs, began to move her body up and down. In the yellowish light Kristy could see the man's thick erection extending straight up in the air, disappearing when her mother sat down and let the shaft poke up deep inside her.
"Oh, God, it feels so good…" her mother murmured, throwing her head back and squeezing her eyes shut as she moved slowly, leisurely, over the man.
As her slim, naked body bounced up and down on her uncle's loins, Kristy could see the nipples on her mother's small, round breast mounds seeming to stick straight out as the woman softly moaned with each plunge of her brother's shaft up inside her.
While the girl watched the completely uninhibited sex between the two adult siblings, the fire of the teenage girl's arousal grew between her legs like never before. Finally, Kristy's fingers frantically pulled down and to the side the elastic leg band of the bikini panties she wore, and the girl immediately stuffed her middle finger deeply up into her hot, aching fuck hole, rubbing the small shaft quickly back and forth over her swollen clit.
The horny fifteen-year-old girl leaned against the doorway, the intense sexual excitement making her weak with pleasure. She closed her eyes as her finger moved in and out between the elastic grip of her pussy lips in quick, short strokes. She could hear the cries and whimpers of delight from the two grown-ups as they fucked on the bed, and she imagined it was her having sex; it was her fucking so freely — fucking the boy from school, fucking the older teenage boy who lived downstairs, fucking…Uncle Ted….
That sudden and unexpected fantasy flashed in her head just as her orgasm exploded between her legs. The girl bit her lower lip to keep from crying out at the sudden and powerful sexual climax that jolted her body. It was the most pleasurable experience she ever felt before. Her body seemed to shiver and convulse as she came, and an incredible flow of wetness seemed to gush from her slit as she continued to finger herself, prolonging that wonderful, delicious feeling she had discovered a couple of years before.
Kristy knew just how to make herself cum and how to keep the waves of orgasm rolling through her body. As each orgasmic spasm began to wane, she would resume her manual stimulation, building to another peak of sexual tension that released itself with such incredible pleasure. Her finger would make quick, hard little circles over her clit as another orgasm exploded in her body.
Through the sexual haze she heard her uncle groan and watched as he grabbed her mother's hips and stopped her up and down motion. The man seemed to hold her down onto his cock as he pumped his cream deep up into her pussy. Kristy didn't know that it was the second time that night that her uncle had filled her mother's pussy.
Realizing she might be discovered, the teenage girl quietly stepped away from the bedroom doorway and slowly pulled the door closed behind her.
She didn't close it completely — she didn't want the two adults to know that she had seen them, had watched them.
Kristy leaned against the wall of the hallway, the crotch of her panties soaked with her pussy wetness and her legs weak from her multiple orgasm.
It had certainly been an enjoyable, and revealing, experience for the young teenage girl. After all, discovering that her mother and her uncle, the two being brother and sister, were having sex and had been having sex for what sounded like years and years, was certainly surprising, if not shocking, news.