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                 K R I S T E N' S    C O L L E C T I O N
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This work is copyrighted to the author © 2008.  Please
don't remove the author information or make any changes
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Learning Curve
by Old Bill (address withheld)

***

Teen-aged twins teach their younger brother to be an 
adequate lover. (ffm-teens, youths, inc)

***

Kim tiptoed into her brother's small bedroom, raised 
the shade quietly and stared out at the backyard, her 
hands on the window frame and high breasts right on the 
cool glass, nipples hardening pleasantly. The snow 
looked a foot thick atop the shed, and it was still 
coming down. It was beautiful, glistening, cold. She 
turned, looked at her sleeping little brother, her hand 
on her full breast, kicked his mattress and when the 
boy groaned, said loudly, "No school, dork. It snowed a 
foot."

"Um," he said and rolled to his back, rubbing his eyes 
and yawning.

Kim blinked and licked her lips as her little brother 
tented up the heavy comforter over his groin. "Ew," she 
said more or less to herself, "Gotta look at that." She 
was fifteen and it had been at least two years since 
she had ignored a stiff prick, but she had gone three 
whole days without a boy's cock in her talented pussy 
and she felt needy. She yanked back the covers and her 
13-year-old brother yelped. "Damn," she said, feeling 
her vagina contract, "how big is that thing?" It jutted 
up out of the fly of his flannel pajamas, trembling in 
the chill air, its blue-veined shaft pale pink and its 
rounded head almost purple.

"Go away," Billy yelped, embarrassed, pulling the 
blanket and sheet back up over his boner. "I can't help 
it." His hand went to his painfully swollen balls as he 
turned his back to his horny sister.

"Come on; let me see . It's five or six inches at 
least." She yanked the covers from his hand and tossed 
them over the foot of the bed and then pounced on his 
cock, grabbing it with both hands. "Oh Billy," she 
cooed, licking its sensitive glans and squeezing it 
firmly, "It's beautiful." She pushed him flat, swung a 
leg over his loins, and before he knew what was 
happening, she had lowered herself on his rock-hard, 
early-morning erection. Her fluttering inner lips 
gobbled it up, and she screwed herself all the way down 
to his hairy belly, eyes closed and a smile on her lips 
as her juices started flowing. 

"Oh yes," she sighed as she wiggled on his skinny 
spear. "Now get your paws up here under my shirt." She 
had enjoyed bigger cocks, lots of them, but none that 
were any harder. She squeezed with her Kegel trained 
muscles, and the boy's eyes got big and his mouth fell 
open. He masturbated regularly, but nothing had ever 
felt like that; she was going to tear it off. He 
squealed.

"Kimmy," Madison cried as she came into the back room, 
"what are you doing?" She stood with her long legs 
widely spread and her fists on her lean hips.

Her twin smiled at her and licked her lips as she 
bounced on her little brother's firm belly, flexing her 
strong thighs. "Having fun." She put her hands on her 
Billy's chest, leaned forward and began moving a bit 
faster, rocking from side to side, stimulating her 
engorged clit, mouth open, drooling just a bit.

"That's gross," Madison said, sitting down beside her 
brother's head and running her fingers through his 
bristly hair. He was sweating, she noticed. Both of his 
forearms were now up under Kim's football jersey 
nightgown, and he was gently kneading her big jugs, 
mouth gapping. "Does he know how to eat pussy?"

Kim shook her head, scrunched her eyes closed and 
gritted her teeth as she felt a climax nearing. "I 
doubt it. But he's hot and hard, real hard."

Madison grabbed the headboard and then perched on her 
young brother's smooth chest, wiggled forward, pulled 
her jersey to her waist and presented her carefully-
shaved and tight-lipped pussy to Billy's open mouth. 
She grabbed his hair, yanked hard and said, "Now lick, 
you little queer. Lick deep and hard." Her lips 
fluttered open.

Billy's nose probed at his sister's clitoral hood, and 
he drove his tongue into her vagina and then lapped 
upwards, frightened and confused. Madison shivered with 
delight as her twin sister sobbed behind her and then 
grasped her shoulders as she came on the boy's cock, 
keening loudly. Once the orgasm passed, Kimberly slid 
off the bed and ran for the bathroom with both hands 
between her legs. Madison wiggled away from the Billy's 
seeking tongue, mashed his rigid prick into his abdomen 
and then rose above it. "Hold it up," she said to the 
confused 13-year-old boy.

Billy grasped his slick, hard penis at its base and 
watched his sister tease its head with her pink labia 
before taking it into her all at once and grinding them 
together. He looked up into her face and saw a stare of 
narrow-eyed concentration and then a smile of pleasure 
as her vagina rippled with joy on his jerking ram. She 
licked her lips and then gritted her teeth as her 
brother's prick head nudged a particularly sensitive 
place. She squeezed. He squealed. She bounced. He 
gasped.

Despite the room's chilly air, the lithe girl pulled 
her football jersey over her head and tossed it away. 
Then she leaned forward and brought her full breasts to 
her little brother's mouth, waving them from side to 
side. Except in magazines and on his computer, Billy 
had never seen a girl's breasts, but his mouth knew 
exactly what to do, and he sucked and nibbled gently as 
Madison moved her pelvis up and down on his rigid 
prick, squishing them together firmly each time she 
came down and took it all inside her. The room filled 
with the sound creaking bedsprings and the slap of 
young flesh as he pistoned upward into his eager 
sister.

"Don't just lie there," Madison moaned, "get to work. 
Thrust harder, push, ram it into me. Oh, you're 
impossible. Let's roll over." With Billy on top, the 
girl locked her legs about his middle, pushed at his 
butt with her heels and then demanded, "Harder, faster, 
make me feel it. Come on. Do push-ups, you jerk."

Billy arched up and hammered into his steaming sister, 
crying with effort, grunting and sobbing as he 
accelerated and felt his testicles clamping to the base 
of his prick and then pulsing as he ejaculated. And 
pulsed again, his whole body shaking. He whimpered as 
he came again.

"Don't stop," Madison demanded. 'You're not finished, 
not even close." He was still hard, and she clasped his 
cock with her vaginal muscles, milking it as her pelvis 
quivered.

"I can't," Billy moaned, but he did, getting his hips 
once more into action and driving his rod into his 
sister again and again as she writhed beneath him.

"How's he doing?" Kim asked as she came back to the 
room and watched her little brother's hips rise and 
fall between her twin's wide-spread knees, his buttocks 
clenching and relaxing with each penetration. His face 
was red, and he seemed to be gasping for breath.

"I'm close," said her twin, grinding her clit into her 
brother's pubic bone. "He's still good and hard." She 
shuddered and closed her eyes and then pulled her 
brother's sweaty body down atop her and hugged him 
firmly. His prick kept moving, jerking and ramming as 
Madison climaxed with a cry of success. She pushed the 
boy off and clambered out of the bed, sitting on the 
side and smiling as her twin sister climbed atop the 
boy's body facing his feet. "I think he's had it."

Kimberly grasped Billy's swollen scotum and grinned. 
"Nope. Watch." She tickled the underside of the boy's 
limp cock as it lay on his stomach and it soon jumped 
and then quivered and then rose, bouncing on his belly, 
now red from friction. The girl took it in as it 
hardened and then leaned to put her hands on his knees 
as he filled her once more. "Good boy," she sighed, 
slapping his haunch. "Good boy." And then she began 
moving, rotating, undulating. Billy grasped her 
buttocks and did his best, feeling his spine protesting 
as he arched his back.

He couldn't believe it. Kim was still wearing her 
football jersey nightshirt, the one a starting lineman 
had given her, and he could see her rounded buttocks as 
she moved up and down on his sore ram, which was still 
remarkably hard and straight, glistening with their 
juices, appearing and disappearing. Maybe it's a dream 
he thought as his other sister returned, stood looked 
at him and then said, "Let's do doggy."

Kim crawled off his tired horn and Madison got the boy 
up behind her. "Ram it in," he ordered, and he did as 
he was told, his hands on her rounded hips, and the 
girl he had on the end of his rigid rod buried her head 
in his pillow and gasped with pleasure.

Over the next month, the twins taught their little 
brother to be a world-class cunt licker and a more than 
adequate pussy fucker. Almost every day after school, 
one or the other of them ran him through his paces, and 
almost every evening one of the girls crawled into his 
bed to give him a test. 

The more he fucked, the better he got at it and the 
longer he lasted, and the more he licked the girls' 
cunts the more he learned about how to please them. He 
now could get two hooked finger's up into a soggy 
vagina and find a firm g-spot while his tongue and lips 
were serving an aching clitoris and he now could hump 
for ten minute straight without cumming.

In the spring the 13-year-old enjoyed a sometimes-
painful growth spurt and went from five-seven to five-
ten in less than two months. His penis grew 
proportionately and was soon a firm eight inches when 
one of the beautiful twins spread her legs for him. 
They now had to tell him to stop when he had satisfied 
them.

On his fourteenth birthday, the twins brought him a 
lovely young blonde, a girl with a reputation as the 
best lay in high school, and she spent two hours in his 
bedroom, the first girl other than his siblings with 
whom he had sex. They made him wear a condom to fuck 
the blonde, and he used up a half-dozen before he quit. 
The sixteen-year-old staggered from his room, sore and 
sated, told the twins that their brother was the best 
boy she had ever fucked and drove off in the car one of 
her uncles had given her for a year's worth of blow-
jobs.

"You need some girl friends," Kim told him as they lay 
coupled on their sides, nose to nose, the boy's long 
prick just within the girl's well-tried quim which 
fluttered without her effort as his rod jumped and 
flexed.

"Why?" he managed to say, having come twice that 
afternoon and now doing what his sister considered 
resting for a third vigorous coupling in a strange, and 
often painful, position. He had recently driven his big 
cock straight down into the gasping girl as she lay on 
the floor by his bed, her legs in the air.

"Because you are a very good lover and there are lots 
of girls out there looking for boys like you. We've 
been spreading the word, so you shouldn't have any 
trouble hooking up now and then."

Things might have proceeded more or less normally if 
the boy's 12-year-old sister hadn't decided to get in 
on the fun. She had listened to the twins teaching her 
brother and even peeked at their vigorous couplings and 
now her virgin pussy was aching for a man, for her 
brother. So one spring Saturday morning, shortly after 
the sun rose, she tip-toed into Billy's room, stripped 
off her baby-doll pajamas and slid into bed beside him.

Billy's left eye popped open and there she was, his 
little sister smiling at him, a curly-headed angel. 
"What are you doing?" he hissed.

"I had a bad dream," she lied quietly, wiggling closer 
and feeling the head of his hard prick poking her 
thigh.

"You shouldn't be here," he whispered, trying to push 
her away and finding out that she was naked. Her 
breasts were small and conical and her hips were 
boyish, but she was very pretty in a tom-boy sort of 
way.

"I was scared," she sighed, reaching down to capture 
the rounded head of his blood-hot member.

"Don't," he said as her hand slid down the thick shaft 
to the hairy base of his painfully hard penis.

"Please," she sobbed, sniffing loudly. "Don't be mean." 
She now had both hands on his pride and joy. "Why is so 
hot?"

"Blood," he said. "Leave it alone." He tried to twist 
away without success. He slapped her hands away.

She turned over so her back was to him and said, "Hug 
me, Billy, hold me, please." She backed up and moved 
her buttocks into his groin, feeling his big prick 
slide between her thighs, grazing her sex lips.

Sis, as she was known although her name was Susannah, 
was no innocent. She had handled a number of young 
males' private parts and even sucked a couple down in 
the dark basement of a friend's home. But she was 
indeed a virgin and her experience was limited. When 
she put her small hands on her brother's big prick, her 
heart almost stopped. It was at least twice as big as 
any of the immature cocks she had played with.

And now she was going to invite that monster into her 
body, into a hole so small she could barely probe it 
with the tip of her little finger. She took a deep 
breath as her brother's right hand covered her right 
breast and pulled her to his warm, well-muscled body. 
Several inches of his manhood now stood out from her 
groin, and she rubbed her wet slit up and down his long 
rod very slowly and gently while she teased his cock 
head with her finger tips. 

"Oh, that feels good," she sighed, wiggling as his 
other hand slid down her smooth body to her groin and 
his forefinger touched his rigid cock where it rose 
between her puckered lips.

"That's enough, Sis. Get back to your bed," he 
whispered in her ear as he stroked her clitoral hood 
just as his twin sisters had taught him

"Um," sighed the girl, moving her pelvis and nearly 
capturing his cock head. "Put it in me, please, 
please."

"You're crazy," he said, louder than he meant to. He 
pushed her away and turned his back to her. She quickly 
rolled over and snuggled close, her hand right back on 
his aching cock which stood up before his stomach, 
leaking lubricant.

"Oh, poor Billy," she sighed, rubbing her hard, little 
tits on his back and stroking down to his scrotum, now 
swollen into a globe nearly the size of a baseball. "I 
thought boys' things stuck straight out."

"Leave me alone, pest. Get back to your bed. You're 
twelve years old. Act your age."

She sniffed and stroked gently, cupping his glans in 
her palm. "You're so mean. You do it to the twins, do 
it all the time."

'They're fifteen, squirt."

"Just once. Poke me and I'll go away."

"You're crazy," he said, turning face down on his bed 
and mashing his cock beneath him.

Sis lay beside him, very still, patient, her fingers 
stroking her wet slit. She sniffed. "You could lick me 
at least. Pretty please."

He turned his face toward her. "Go away," he mumbled, 
very uncomfortable with his cock throbbing and jerking 
under him.

"Pop my cherry and I'll quit. Promise."

He rolled to his back and pulled his covers up over his 
groin.

"At least let me try. You can just lie there," the girl 
said, and she got up and sat on her heels.

Her brother looked at her nubile body and trembled. He 
closed his eyes and nodded.

Sis squealed, pulled down his blanket and straddled his 
belly. She rose on her knees, reached behind her to 
lift his thick prick up between her legs and then 
wiggled down on it, setting the blunt head right at the 
entrance of her quivering vagina. She took a deep 
breath and eased down on it. It wouldn't go in. She 
wiggled right and left, pushed hard and finally asked 
Billy to hold it for her. He grasped his thick male 
member and smiled up at her, amused by her look of 
concentration as she tried over and over to impale 
herself and failed again and again. 

She fell down atop him and her patted her firm 
buttocks. "Don't cry," he said. "You know where the 
twins hide there toys?'

She nodded.

"Well, you go get their smallest dildo, grease it up 
and practice, and when you are ready, we'll try again. 
OK?"

She sniffed and nodded. "Promise?"

He hugged her and kissed her forehead. "Promise," he 
said.

END

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This story was written as an adult fantasy. The author
does not condone the described behavior in real life.

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Kristen's collection - Directory 54