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Sinning Is More Fun
by Devious Doggyslut (devious_doggyslut@hotmail.com)

***

A young girl watches her older sister play, but little 
does she know her sister has something in mind for her. 
(FF-teens, beast, inc, voy, reluc)

***

As Katrina quietly tip-toed along the hallway she could 
hear the gentle tick-tock of the old grandfather clock 
that stood at the end of the corridor. Street lights 
shone in though the open bathroom door, providing her 
with a dim view of where she was going. Her feet made 
barely any sound on the soft carpeted floor, so when 
she heard a muffled bang, she stopped. Standing still 
like a rabbit caught in the headlights, she listened 
for any more noises. 

Suddenly it clicked into place in her mind; it was just 
the plumbing, as the house settled for the night. 
Almost laughing at herself, she quickly made her way to 
the small alcove at the head of the stairs, where a 
bedroom door lay open. Concealing herself in shadows 
she hid behind the bookshelf next to the door. Looking 
through the doorway, she saw her older sister Lisa 
lying still in her bed.

As she looked in on her sister, Katrina reflected again 
just how different they were. She was only thirteen, 
and unlike Lisa she aspired to be good. She went to 
church regularly and never wore revealing clothes 
despite the fact her young body had blossomed early on 
into a pleasing shape. 

With her long legs, narrow hips and firm B cup breasts, 
she was vaguely aware that boys liked to look at her. 
But she didn't care much for boys; they never 
understood her desire to behave. The few boys who had 
been bold enough to try and feel her breasts through 
her high collared, loose fitting shirts had quickly 
been aquatinted with a firm smack across the face. They 
never tried again.

Sixteen year old Lisa had dark brown hair and 
mischievous green eyes that always hinted at ideas of 
misbehaving, a polar opposite of Katrina's smooth 
blonde hair and innocent blue eyes. Her figure was 
similar, but her hips were bigger and her breasts were 
a fuller C cup. She rebelled against all constraints 
put on her, and seemed to enjoy teasing boys by 
flaunting her curves.

Katrina felt a guilty feeling stir inside her once 
again as she stared at her sister, willing her to do 
something. For quite some time now she had been 
watching her sister at night, after accidentally 
hearing her moaning softly one night and sneaking past 
her room to see her touching herself. After watching 
her a couple more times, Katrina knew what her sister 
was doing: masturbating. Something she had been told at 
church was a sin. But how could something bad arouse 
such pleasant feelings in her, she wondered. She 
enjoyed the warm, slippery feeling between her legs 
each time she watched Lisa, though she never touched 
herself in the same way.

Just then, Lisa began to stir. Katrina watched eagerly 
as Lisa threw her blankets off and reached down, 
pinching her nipples with one hand and rubbing between 
her legs in a circular motion with one finger. As she 
always did, Katrina thought how wonderful it was that 
Lisa always slept naked.

Tonight Lisa quickly started moaning and wriggling 
around, evidently enjoying every second of her own 
touch. It wasn't long before she climaxed, letting out 
a muffled cross between a moan and a sigh. Katrina knew 
sometimes it took her sister a while, whereas sometimes 
she finished quickly. She was always disappointed on 
these quick nights but as she silently made her way 
back to her own room, she reminded herself of a 
comforting thought. There's always tomorrow night.

***

The next night, Katrina tried to stay away from her 
sister's room. She had started feeling that she was 
spending too much time hovering around her sister's 
door, and decided she should try to cut back a little. 
The guilty feelings every time she concealed herself 
behind the bookcase were starting to bother her. But as 
she listened to the sounds of her sister getting into 
bed, she knew she wouldn't be able to stay away. 

Waiting for a few minutes as her parents finished 
locking up the house and turning lights off, she 
eventually crept out of bed and hurried down the hall. 
Taking up her position behind the bookcase, she noticed 
King, the family Rottweiler, laying on the floor at the 
foot of Lisa's bed. Katrina was slightly bothered. She 
knew King sometimes slept in Lisa's room, but he had 
never been there before when she spied on her sister. 
Hoping he wouldn't notice her and come over to 
investigate, thus giving her away, Katrina stared hard 
at Lisa.

Lisa gently eased her blankets off her, her hands going 
straight between her legs. As Katrina watched her 
fingers pinch and stroke, she heard Lisa mumbling to 
herself.

'Oh my God, I'm so wet tonight. Does my pussy ever need 
some attention... if only I had someone here to give me 
a good cunt-licking!'

Surprised, Katrina turned Lisa's words over in her 
mind. Was pussy what her sister called the space 
between her legs? And what about the other word, cunt? 
Was it just another word for the same thing? And the 
licking... did it actually feel nice to be licked down 
there?

Then Lisa did something that surprised Katrina. She sat 
up and swung her legs off the bed, sitting on the very 
edge of her mattress. She then spread her legs wide, 
treating Katrina to a shadowy view of her most private 
place. Then she lightly slapped the inside of her thigh 
and whispered to the dog.

King sat up immediately, and when he saw the way his 
mistress was sitting he made his way to her as if he 
had done it many times before and knew what was 
expected of him. Angling for a better look, Katrina 
nearly fell over with shock as she saw King lick her 
sister between the legs!

Lisa threw her head back and moaned softly, pulling the 
dogs head closer against her with one hand. 'Oh yes 
King, lick my wet little pussy. Get it right in 
there... ohhhh yes, tongue my clit you good dog!'

This seemed very wrong to Katrina. Never had she ever 
heard of anything like this before, she knew it had to 
be very very wrong! And yet... the feelings that came 
between her legs whenever she watched Lisa were 
stronger than before. For the first time ever, she 
slipped her own finger inside her panties and felt the 
folds between her legs.

Immediately she noticed the wetness that her sister had 
been talking about, the private place between her legs 
was absolutely soaked. Experimentally she rubbed her 
finger along her slit, finding a hard little knob. She 
rubbed at it and felt an incredible pleasure flood 
through her, almost making her cry out. She continued 
to rub as she watched King lick Lisa, Lisa's eyes 
closed as she continued to moan softly.

All too soon Katrina began to hear the noises that 
meant Lisa was almost finished. Disappointed, she 
watched Lisa let out her last moan, her entire body 
shaking. As her body stopped quivering she pulled the 
dog up against herself on the bed, allowing him to lick 
her face and even putting out her own tongue to kiss 
him. Katrina quickly made her way back to bed, her mind 
reeling.

***

The next morning, their parents had some news. Over 
breakfast they told the girls they were going away for 
a business trip, and would be gone overnight. 

'Now it's just a quick routine matter,' their mother 
said, rummaging through her bag and locating a list of 
telephone numbers. 'We'll be back early tomorrow 
afternoon, I'm sure you can both make your own 
entertainment until then. Lisa, look after your sister 
and for Christ's sakes be good. Don't forget to feed 
the dog, keep him in the house during the night if it 
makes you feel safer. Your father has his mobile phone 
but if he doesn't answer, try these.'

'Don't worry,' Lisa said innocently. 'We'll be fine, 
right Katie?'

Katrina nodded mutely, surprised that her sister was 
being nice to her. Usually she snapped and argued 
whenever she had to babysit her. Before she had time to 
worry about Lisa's change in behaviour, their parents 
were gone and they had the house to themselves. Lisa 
disappeared upstairs to chat with her friends online, 
and Katrina decided to make some cookies.

For the rest of the day they both pottered around at 
their own various amusements, and for dinner Lisa 
ordered a pizza. They watched a scary movie, which Lisa 
let Katrina stay up to see the end of. Again it was 
sufficiently unusual behaviour for Katrina's guard to 
be up. Finally after the movie, Lisa declared it was 
time for bed. But the younger girl had been slightly 
spooked by the movie, and seemed reluctant to go to her 
bed alone. Apparently not in the mood for arguing, Lisa 
told Katrina she could sleep with her.

Katrina anxiously changed into her long sleeved, high 
necked nightgown which fell below her knees, wondering 
what Lisa would wear to bed. She was relieved yet oddly 
disappointed to find Lisa wasn't naked when she made 
her way to her room, but wearing a tiny pair of shorts 
and a t-shirt that looked a size too small for her.

'I've locked up,' Lisa said. 'And we'll keep King in 
here so you feel safe okay? Now, get in the bed and go 
to sleep.'

As Katrina tried to get comfortable, she felt Lisa 
snuggle in behind her and throw her arm around her 
waist, pulling her closer.

'What are you doing?' Katrina asked, surprised.

'Hopefully stopping you from feeling like such a wuss,' 
Lisa replied.

Katrina accepted this reply, but felt a strange feeling 
wash over her as Lisa ran her hand up and down her 
thigh, slowly pulling her nightgown up above her knees. 
When the hem was halfway up her thighs however, Katrina 
felt she'd better say something.

'Lisa, why are you pulling my nightgown up?'

Her sister didn't reply, and Katrina was about to ask 
again, when she felt Lisa's hands grip tightly onto 
her. In a quick move, Lisa had rolled Katrina onto her 
back and was sitting astride her with her hands 
clamping her wrists to the bed.

'Lisa?' Katrina asked, feeling slightly scared.

'I know you've been watching me late at night,' Lisa 
said, staring hard at her squirming sister. 'Watching 
me touch myself, you're such a little pervert spying on 
me like that. What do you think Father Crimmond would 
have to say about that?'

Shocked, Katrina felt her insides freeze. 'I... I...'

'Did you like what you saw? You're not such an innocent 
little church girl as you like everyone to believe are 
you?' Lisa started rubbing her crotch against her 
sister. 'I bet you touched yourself when you watched 
me. Did you know your church says that's a SIN!?'

'Please Lisa,' Katrina struggled. 'Let me go back to my 
own bed, I promise I'll never spy on you again!'

'No, I don't think I will.' Lisa shrugged. 'You know, 
it's not as fun to play with yourself when you're 
alone, it's better when there's someone else there.'

Seeing where her sister's train of thought was headed, 
Katrina fought to get free. 'No Lisa, it's not right. 
We're sisters!'

'You'll enjoy yourself,' Lisa smirked, quickly letting 
go of one of Katrina's hands and reaching for something 
that was wedged in the gap between the bed and the 
wall. As she handcuffed Katrina's wrists to the 
headboard, Katrina realised her sister must have been 
planning to make her into her plaything all along. She 
opened her mouth again but Lisa slapped her firmly, 
stinging her cheek. 'If you make any noise other than a 
moan of pleasure I will hit you again. Understand?'

Katrina nodded firmly, a single tear running down her 
cheek. Lisa smiled with satisfaction, and produced a 
pair of scissors which she used to cut away Katrina's 
nightgown. 

The young girl finally lay naked, and Lisa leaned 
forward and kissed her gently on the mouth. Then she 
probed at her closed lips with her tongue until Katrina 
finally opened her mouth and, feeling she had better 
cooperate, starting passionately kissing her sister 
back. Lisa then kissed down her neck and all over her 
breasts, gently biting her nipples.

It was a pleasurable feeling, and Katrina felt a sweet 
spasm between her legs. Dismayed she hoped Lisa hadn't 
notice, and she would stop soon. But Lisa was still 
kissing her way down her sister's body until she 
finally came to her light bush of pubic hair, where 
Katrina's legs were closed tight. With a firm and 
persuasive hand, Lisa pulled her legs apart.

'Mmm... virgin pussy,' she said, eyeing Katrina. She 
then lowered her head and started lightly tonguing 
along her slit, occasionally pushing her tongue inside 
Katrina's tight little cunt. She then lightly flicked 
her tongue over her slit, causing Katrina to gasp in 
pleasure.

'Oh, so you do like it?' Lisa asked, her eyebrow 
arched. 'You like me licking your tight little virgin 
cunt?'

As she spoke she pushed her thumb halfway into her 
sister's hole, feeling the resistance of her hymen 
blocking her from going further. Seeing her sister try 
to hide the pleasure that was evident on her face, Lisa 
once more lowered her head and started stroking circles 
around her clit with her tongue. Once her face was 
covered in Katrina's juices, Lisa came up to her 
sister's face.

'Do you want to taste your pussy juices?' she asked. 
Katrina hesitated, then shook her head. Ignoring her 
refusal, Lisa firmly kissed her sister, exploring her 
tongue with her mouth. When she realised her sister was 
eagerly kissing her in return, she stopped and 
repositioned herself so that she was able to quickly 
whip off her t-shirt and shorts. She then placed her 
own dripping wet pussy above Katrina's face.

'Lick my cunt, like I just did to yours. Now!'

Almost experimentally, Katrina stuck out her tongue and 
lightly stroked Lisa's clit. Lisa moaned loudly, 
pressing herself down harder against her sister's face.

'Lick me harder and faster you little slut,' she 
groaned. 'Lick me just like I did to you.'

Katrina obeyed and quickly proved to have quite an 
untapped talent. As Lisa wriggled around on top of her 
sister's face, Katrina eagerly lapped up her juices 
until Lisa was on the verge of cumming. She moved away, 
knowing the best was yet to come. After first 
extracting a promise from her dazed sister not to run 
away, Lisa unlocked the handcuffs.

'Now,' she instructed. 'Kneel on all fours on the floor 
beside the bed and lick me again.'

Doing as she was told, Katrina was quite caught up in a 
frenzy of clit-tonguing when King smelt the arousal in 
the air. He got up and saw Katrina in an ideal 
position, then quickly started to run his tongue all 
over her exposed twat. Katrina turned in shock when she 
realised what was going on, but Lisa grabbed her head 
back and held her firmly between her legs again. 
Disgusted with herself but unstoppably turned on, 
Katrina kept licking Lisa while King slid his tongue as 
far inside her pussy as he could. 

With her face buried in her sister's cunt Katrina's 
moans were muffled, but it was enough for Lisa to start 
approaching the best climax of her life. Watching her 
perfect, saintly, church going sister being eaten out 
by a dog as she eagerly licked up her older sister's 
juices was such a deliciously forbidden sight. 

Encouraged by her sister's moans she started crying out 
in pleasure herself, when something caught her 
attention. King was moving around and without warning 
he suddenly mounted Katrina. The younger girl stopped 
licking at once as King thrust at her with his erect 
cock, and looked up.

'Lisa, what's he doing?'

Unable to believe her eyes, Lisa watched enviously. She 
had planned to one day have sex with King if the 
pleasure of his tongue wasn't enough, but now he was 
going to take her little sister's virginity! 'He's 
going to fuck you Katrina, he's going to put his dick 
inside you and turn you into his bitch!'

Katrina's eyes opened wide with shock as she tried to 
move away. But Lisa wasn't about to miss the best 
possible sexual scene of her entire life. She grabbed 
Katrina and forced her head between her legs again, 
gasping as she felt that smooth little tongue stroke 
her clit once more. 

King finally made contact, thrusting his hard rod into 
Katrina and causing her to scream out. Lisa watched 
eagerly as King thrust at the younger girl and Katrina 
started to move in rhythm with him. In fact, she had 
even started licking at Lisa again and was moaning 
loudly with horny desire as King slammed into her 
harder and harder. Unable to stop herself Lisa threw 
her head back and screamed as her orgasm ripped through 
her, hearing a similar scream echo from her sister as 
Katrina experienced her first orgasm.

King also appeared to cum quickly, only several minutes 
after he had first started licking Katrina he was 
withdrawing from her and causing a river of dog cum to 
gush from her stretched hole. Katrina fell to the floor 
in a heap, whimpering as the aftershocks of her orgasm 
spread through her. Lisa lay on her bed, looking down 
at her little sister. Finally Katrina had gathered 
enough breath to speak.

'I don't think I'll be able to go to church again.'

Lisa smiled. 'Of course you won't. Sinning is much more 
fun.

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 45