Chapter 4
After he had watched his sexy mom showering, with the frothy soap suds running down the insides of her shapely thighs like spilled cum, Ricky Marshall had returned to his bedroom and beat his meat violently, spraying spunk all around the room.
But for a potent teenager, a single cumming under such great provocation and stimulation was certainly not enough to satisfy him.
His cock had never fully softened and his balls had begun to recharge themselves right away and by the time he got to school, he had an embarrassing hard-on again.
He managed to conceal it under his desk in class, but it was troublesome in the school corridors, forcing him to walk awkwardly, with his school books clutched to his crotch and his muscular thighs bowed out around his balls so that he was walking like a cowboy.
Ricky resolved to empty it off again as soon as he had a free period and some privacy. He considered the venue. He could go into one of the cubicles in the bathroom, but other guys were always coming in and out of there and he didn't want anyone to hear him beating his meat and stay to identify the source when he emerged.
He decided that the library would be a more secluded place to spill his spunk, since most of the other students would be in class. No one that he knew would think of squandering a free period by reading, and the librarian was an ancient, near-sighted old crone living in a dream world.
So Ricky headed for the school library as soon as he got the chance—and, as fate would have it, only minutes after his sister had arrived there, excused from class in order to research an essay.
Nancy, a nubile strawberry blonde, her tits bouncy in her sweater and her ass adorable in her tight skirt, was sitting at a table off to one side. She glanced up curiously when her brother came in.
Ricky was more interested in playing sports than he was in reading, being a robust, red-blooded American boy, and Nancy was mildly surprised to see him there.
He didn't notice her.
And the old crone at the desk, as usual, was oblivious to the comings and goings of scholars.
Ricky hurried back among the shelves.
Now that's funny, thought his sister, becoming more curious than ever. There was something wary, furtive, even guilty about Ricky's demeanor.
Was he a closet bibliophile?
Did her brother sneak into the library to peruse great works of literature, considering such a pursuit effete and wanting to keep it secret?
He had gone right past the sports section, heading for the dusty tomes at the very back of the room. Nancy was intrigued by the possibility that her brother was scholarly but considered it a perversion.
Or had he discovered a dirty book on the shelves?
The little minx decided to go quietly back behind him and get to the truth of the unlikely matter. She tiptoed into the maze of shelves, pausing to listen, tracking her sibling like the minotaur in the Labyrinth.
Then she heard him grunting.
Although Nancy was a sexy little tart, she was also sort of naive, being young, and although she played with her pussy frequently, it didn't dawn on her that her older brother might be a wanker, too.
She could only suppose that he had found some book on physical culture and was exercising in secrecy, to gain an advantage on the other athletes.
That wasn't very interesting and Nancy almost turned back, but then she figured she would just have a quick peek, anyhow so that, if he was all contorted and looked silly, she could tease him.
And when she found out just what big muscle he was so industriously exercising, the naughty teenager was sure glad that she had decided to spy.
Ricky had his fly open and his cock and balls out and was facing the row of books so that he was standing in profile to his peeking sister. That position gave her a good look at his prick while, at the same time, keeping the youth from becoming aware that she was observing him.
Nancy's eyes widened and her mouth opened. A surge of surprise was instantly followed by smoldering lust as the cockeyed girl gazed at his groin.
He was frigging off very slowly, enjoying it and trying to make it last. His face was all twisted up in a mask of unholy passion as, behind his hooded eyes, he thought about his curvy mother in the shower.
His cock was a huge meaty bludgeon, heavy-headed and thick-shafted, looming up from a set of balls that looked as big as water wings.
As his fist pulled up, his foreskin rolled over the ledge of his cock-knob, and as he yanked back towards his balls, that flushed slab flared out in a fat wedge.
He grunted as he tugged back and sighed as his palm and encircling fingers drew back up to the head. His balls were swinging out under his prick like the dewlap of a rutting moose, slapping against the heel of his hand.
Pre-cum was oozing from his open pisshole and glistening on his cock-knob. Pearly ribbons of the preliminary seepage ran down his prick, lubricating the action.
The sight was driving Nancy wild.
It would have turned her on to see any guy jerking off, but spying on her own brother seemed naughtier—and that made it more exciting.
Her nipples surged out in twin peaks in her sweater and her cunt began to spill down her legs. Her tongue was slowly sliding across her moist lips and her mouth was drooling at the succulent sight of that sibling sex tackle.
The girl began to feel herself up, kneading her tits and pulling at the nipples.
Then she dipped a hand under her skirt and cupped her juicy cunt. Her pussy felt so hot that she wondered if her bikini panties were melting.
Nancy would have kept her presence a secret and given herself a finger fucking while she played the peeper on her prick-pounding brother.
But fate again took a hand.
As he climbed towards the creamy crest, it dawned on Ricky that his jizz was going to squirt out all over the spines of the books on the shelf before him. Although the boy had little respect for books, he realized that it might not be a good idea to slime them up.
The library, he had found, made an excellent place to empty off his balls, and he would no doubt want to use it again. If any book browsers found the slimy evidence of his activities, someone might decide to keep a watch in the back shelves and catch the culprit in the act.
So he began to turn away from the shelves, intending to spill his spunk down on the floor instead of drenching the books with the deluge.
He was turning towards his sister.
As his torso revolved, his prick came around like the turret gun of a battleship, as if he was taking aim on the girl with his cum cannon.
Nancy was so fascinated by the sight of that formidable prick swinging around toward her that she didn't even realize that the rest of his body was also revolving. Her eyes were glued to his groin.
His eyes were heavy-lidded as he grimaced with lust and he didn't see her for a moment.
Then he did—and gasped in alarm.
But he saw, too, that the sexy little vixen was playing with her pussy under her skirt and that her expression was glowing with passion—saw that his sister was far more intrigued than she was disgusted.
Ricky was filled with both panic and desire.
His fist continued to slide up and down his stalk, moving by inertia now, frigging so much an engrained habit that he was doing it automatically.
Then he realized. He yanked his fist back to the hilt of his cockshaft and stopped stroking.
The break in the action also served to break Nancy's concentration and she raised her eyes up from his prick and stared at his face.
They had both caught each other doing the same thing and for a moment they only gaped at one another dumbly, frozen in a taut tableau.
But his cock was pounding like a jack hammer, and her cunt was steaming on her hand, and Nancy realized that this was no time to be bashful or modest or shy.
She smiled bewitchingly at her brother.
His jaws were too tight to smile back and he merely gazed at her in stunned silence.
Nancy drew her soaking hand out from under her dress and moved towards him, tossing her hips and ass about provocatively. Her cunt squished between her thighs as she moved and her nipples poked out like magnets drawn to his prick.
Her lips parted to speak.
Ricky wondered what in hell she would say.
"Want me to do that for you?" she said.