Note: This story was dynamically reformatted for online reading convenience.
 
 Joined At The Hip - Cleo turns into a mermaid in the middle of sex with
Lewis.  What happens when he gets stuck inside of her?

   Note: The following story is an adult fanfic of the Australian
television series "H2O: Just Add Water." (If you're not familiar with the
program, all you need to know is that it's about three teenage girls who
magically transform into mermaids anytime they come into contact with
water.) This story is intended for mature audiences only and is NOT for
kids!

   Contains transformation, lactation, and MF fantasy.

   Lewis and Cleo had been waiting for this opportunity for weeks.  With
Rikki on vacation with her family, and Emma busy working at the juice bar
all weekend, the two of them finally had some time to spent together... 
alone.  Cleo licked her lips in anticipation.

   Now that Charlotte was completely out of the picture, Cleo and Lewis had
taken their relationship to a much more serious level.  They'd been having
sex for a few weeks, and it was incredible, but they always had to dodge
their families and friends to find some privacy.  It was nearly impossible
to enjoy their time together when they had to deal with the hustle and
bustle of their busy lives.  Finally, it was their chance to spend some
quality time together, their first vacation as a couple, and they knew
right where to go.  "Mako Island, here we come."

   Cleo, of course, could simply swim there had she wanted to.  Being a
mermaid, of course, made long-distance swimming her specialty.  She was
really coming out of her shell, starting to enjoy life as a part-time
mermaid.  She even learned to control her wild reactions to the full moon.
Being a mermaid gave her a new perspective on her human body.  Cleo figured
that as long as she had legs, she might as well enjoy them.

   Still, if Lewis was going to come along for the trip, she would have to
take his boat - a much slower way of getting to the island!  But, if this
was going to be their time together, Cleo and Lewis could be patient for
another hour, long enough for them to get to the island.

   Sex with Lewis was really enjoyable for her.  Of course, they were
careful, since Cleo was still much too young to risk getting pregnant. 
She's wasn't even sure if she could get pregnant, though.  The first time
she turned into a mermaid, what would happen to the unborn child?  Unsure
about the biology of the matter, she preferred not to think about it. 
Besides, she was having too much fun just being a slut for a while. 
Lewis's own personal slut.  "Haha," she thought to herself as she and Lewis
boarded the rowboat.  "I can't wait to get Lewis and his cock all to myself
for two whole days."

   Lewis and Cleo set out for Mako Island as the sun went down over the
bay. They kissed as they departed from the docks, then held one another
until nightfall, letting the current do all the hard work for them.  The
stars were out as they made camp on Mako that evening.

   After a bite to eat and a short walk on the beach, they found their way
to the Moon Pool, where it had all began a little more than a year ago.  It
was here that Emma, Rikki, and Cleo found themselves trapped in the magical
waters, where they were transformed into mermaids.  They shared that secret
with almost nobody except for Lewis since that night.  And although they
were pretty comfortable in talking to Lewis about their mermaid abilities,
and even letting him watch as they undressed, none of the girls was willing
to reveal to him the true nature of their sexuality.  Yes, each of the
mermaids was bisexual, including Cleo.  Many of their adventures under the
sea involved some sex play, fingers, tongues, nipples, and of course, their
tails.

   But this wasn't the night to come clean.  No, this night was all about
Cleo and Lewis.  She couldn't wait to get her hands on, and her mouth
around, his large cock.  It was the perfect fit for her, really, at least
when she wasn't trying to perform oral sex on him.  He was a little too big
for her, but maybe with practice, she would someday be able to fit it all.
As Cleo and Lewis descended downward, holding hands, into the cave
overlooking the Moon Pool, the thought of his manhood became more than she
could handle.  Suddenly unable to control her urges, she stopped at the
bottom of the cave and grabbed Lewis by the arm.  "Listen, lover, we didn't
come all the way here for just a moonlit walk on the beach, did we?" Lewis
was startled at her suddenly direct tone.  Clearly, she was after something
and she was restless.  Lewis looked up, but there was no full moon.  Not
for another two weeks.  This was the real Cleo, all right, of sound mind
and hormone-raging body.

   With her pussy already wet from anticipation, Cleo pinned Lewis against
the wall of the cavern with a playful look in her eye.  Smiling devilishly,
she took Lewis's shirt and pulled it over his head, giving herself a look
at his surprisingly toned abs.  "Mmmm," she purred lustfully, "a girl could
have some fun with you, lover." She lowered her head down to his waist,
licked his belly button, and continued to draw her tongue upward to his
chest.  "You taste very good, love.  Quite delicious."

   Lewis, his cock now throbbing from the tease, replied, "I've got
something else you can taste, baby."

   She threw his arms around him, kissed him playfully on the lips, smiled,
and giggled a bit.  "Oh, Lewis, you don't have a shirt on, and yet, I still
do.  That hardly seems fair.  What do you think we should do about that?"

   Lewis smiled back, placed his hands around Cleo's shapely waist, and
started pulling her top upward slowly.  He wanted to enjoy this.  Sure, he
had seen her bellybutton and her firm stomach a hundred times before, as
both a human and a mermaid, but each time he enjoyed it more and more.  As
he slipped her shirt upward, taking his first glimpse at her delicious
underboob, Lewis silently took pleasure in the fact that Cleo hadn't worn a
bra tonight.  There was nothing but a thin layer of fabric separating
Cleo's charming, tight little brown nipples from the rest of the world.

   Lewis pulled Cleo's shirt upward, over her head, and as she lifted her
arms, her cute little breasts rose upward, too, as if they were saying
"good evening, Lewis, would you like to play with us?" He tossed her blouse
aside, buried his face in her cleavage and grabbed each tit heartily.  Cleo
gasped in shock at the suddenly animalistic approach Lewis was taking
toward her chest, but as he started licking her tender nipples, she got
caught up in the moment.  "OH, Lewis, I love it when you get rough!"

   They rolled to the floor of the cave, Cleo on her back, and the rocky
cavern surface beneath her was cold.  She didn't seem to mind.  Her long
hair flowed behind her while Lewis still vigourously took her entire tanned
breast into his mouth, sucking in not just the nipple, but the whole tit.
He could fit an entire breast in his mouth, and each time, Cleo felt a rush
of pleasure shoot through her body.  She had just barely enough
self-control to unbuckle his belt and lower his trousers, taking time to do
the same for herself.  They rolled across the cavern floor, momentarily
forgetting about the damp conditions that surrounded them.  They were so
caught up in their lovemaking that they hadn't noticed the tiny pools of
water that were left behind when the tide receded.  Cleo took off her
panties and was now completely naked, her every utterance echoing through
the cavern for all of Mako Island to hear.  Thank goodness they had the
entire island to themselves - Cleo was practically screaming with delight,
and the echos off the cavern walls would have awakened anyone on the
island.

   By now, Lewis had turned his attention away from Cleo's breasts, and
with his cock out for her to enjoy, he was eager to cum all over her.  Cleo
grabbed his cock and put her mouth around it, her warm and skilled tongue
licking the head, then rolling down the shaft.  She attempted to
deep-throat him, but Lewis was so huge that her little throat just couldn't
contain all of him.  She did the best she could to fit the entire cock
inside of her mouth, while Lewis groaned in ecstasy.  One thing about being
a mermaid - for some reason, Cleo instinctively knew just what to do with a
dick in her mouth.  It must have been an old mermaid survival tactic, she
surmised.  If the old stories were true, if mermaids really did lure
sailors to the shallow and jagged rocks, her mermaid predecessors must have
been after their cocks.  She was never as hungry for a penis as she was
right then.

   Lewis was ready to blow his load.  He pulled out of Cleo's mouth, turned
her onto her back, and spread her legs apart.  Taking time to admire her
trimmed and tanned pussy, he was excited to see that her wetness was most
definitely ready.  Using his thumbs, he spread her apart and prepared to
enter.

   Just as Lewis thrust his erection into Cleo's warm, wet, and ready
pussy, Cleo threw her head backward in a throe of ecstasy.  While she
enjoyed the sensation of a large, unprotected penis inside of her, her
long, flowing, wavy brown hair fell backward into a small pool of water. 
She couldn't feel it - she was too preoccupied with the cock inside of her.
Still, it was enough to trigger the transformation that she and her mermaid
sisters had endured so many times before.

   Ordinarily, even a single droplet of water would transform Cleo, Rikki,
or Emma's long, healthy legs into the golden fishtail of a mermaid, fusing
their legs together - and their labia as well.  But the countdown had
begun...  10, 9, 8...  and Cleo was entirely unaware of it.  In just
seconds, she would become a mermaid, complete with a scaled tail, but Lewis
was busy vigourously thrusting his dick into her!

   Seven, six, five...  Lewis was on the verge of cumming into Cleo's hot
shaven pussy when something went very wrong.  With his shaft inside of her
in the traditional missionary position, Cleo realized the problem with only
seconds to spare.  He continued ramming into her despite the stone-cold
look of panic that set into her and her terrified scream, "No, Lewis,
WAIT!" Four, three, two, one!  It was too late!  With a bright flash of
light, Cleo felt the lower half of her body transform into pure water for a
fraction of a second, then solidify as the golden, shapely mermaid's
tail... but with Lewis still inside of her where her vagina had been! 
Cleo's scales started right around her waist, just a few centimeters
beneath her bellybutton, and encompassed her rear end, where she had such a
tight and adorable little butt prior to the change.  In front, though,
something was very different, and Lewis noticed the problem right away.

   Where Cleo's vagina had been just a moment ago, there was nothing but a
mound of orange fish scales, and although inside, Cleo still retained the
warm inviting moisture of a human pussy, the scales now had a vice grip
upon Lewis's penis, like a Chinese finger trap.  The more he tried to pull
out, the tighter the grip became.  Orange scales not only existed on Cleo's
mermaid tail, but they actually appeared to be growing out of Lewis as
well, covering his entire penis and most of his groin area.  The two lovers
were fused together all right - inseparable as long as Cleo was in her
mermaid form, and as an additional frustration, they were still
experiencing the uncommonly good sensation of sexual intercourse.  With
both lovers ready to climax at the time of the transformation, it was as
though time had frozen.  Cleo and Lewis were both stuck together and stuck
on the verge of the most intense orgasm either of them had even
experienced.

   "We're stuck!" shouted Lewis, his balls ready to explode with cum. 
Cleo, with her huge, awkward mermaid's tail, barely could stop panting long
enough to say "yes, but it's SO good, Lewis!" She loved having him inside,
knowing the situation wasn't permanent - she wanted to remain in mermaid
form, with her lover's penis literally trapped inside of her, for as long
as possible.  She looked backward to see the tiny puddle that had caused
her to change.  Why, with Lewis inside of her, attached to her, she felt
better than she ever had before.  Not only could she feel her own sexual
tingling, but she thought - no, she knew - that she could actually sense
was Lewis was feeling as well.  Physically, the two were linked, and for
the first time, Cleo understood what it meant to have her very own penis.
She gained a new perspective and, with his penis still fully erect and
throbbing inside of her, she was forming a psychic bond with Lewis.  She
could actually hear his thoughts, feel his feelings, and suddenly she knew
what sex is like for a boy.  She felt the power of owning a penis, but
suddenly she was overcome with lust as well.

   Along with his thoughts and feelings, Cleo also inherited Lewis's
deeper, darker desires.  All of a sudden the very idea of wearing a bra
sickened the little brown mermaid.  Tearing the algae brazier from her
chest, which had appeared along with her tail as always, Cleo noticed her
breasts had grown slightly since Lewis had been inside her.  Perhaps they
were filling with milk!  Her nipples, dark but erect, pressed into Lewis
like pegs, almost hurting him, but the sensation was almost more than Cleo
could handle.  "OH MY GAWD," she screamed in passion.  The hardness of her
nipples, the fact that she had a cock not only inside her but physically
attached to her, and the psychic bond that she had just developed with
Lewis combined into the most intense orgasm she had ever experienced.

   Naturally, as Cleo climaxed, Lewis felt his own orgasm build, and as he
released his cum into her surprisingly warm fish scaled pussy, he noticed
something was different.  This was not his usual spurt, a few cc's of
sperm, but Cleo somehow had captured his penis inside of her.  Some sort of
mermaid technique was pumping his penis for a seemingly endless supply of
splooge.  Lewis, trapped there with Cleo's fish scales physically merged to
his form, was unable to separate himself from her pelvis, as there no
longer was any visible division between his body and hers.  Merged
together, like Siamese twins conjoined at the crotch, Cleo's consciousness
was slowly melting away into a rush of orgasmic pleasure.  Lewis, feeling
his own orgasm as well as the female orgasm he was subconsciously sharing
with Cleo, felt as though his life was in danger.  As she continued to use
his body for the warm semen he was producing, in record quantities now, he
felt himself being almost consumed by her insatiable mer-vagina.  He was
becoming dehydrated as every droplet of moisture in his own body was being
consumed to make more semen.

   Lewis, ever the scientist, deduced that this must be how mermaids and
mermen make love underwater.  In the ocean, he surmised, there's an endless
supply of water, so the merman could simply produce semen using the
saltwater around him.  Alas, on dry land, Lewis was quickly running out of
body fluids while enjoying a mind-altering orgasm that seemed to go on
endlessly!  And Cleo was so wrapped up in her own orgasm, enjoying the
fully engorged human penis inside of her mermaid's tail that she was
oblivious to the effect it was having on Lewis.  She could bleed him dry
and never even know it!  Lewis was unable to move, with his entire
waistline now covered in the familiar orange scales of a mermaid's tail -
Cleo's scales, keeping him firmly inside of her for as long as he could
withstand it.  Desperate for an answer, Lewis looked around for anything
that might help him remove himself from Cleo's mer-vagina, or at least get
her to change back to her human form.  Nothing was in reach, not even their
clothing.  But wait!  The answer was right in front of him!

   Lewis looked upon the beautifully tanned breasts in front of him, with
Cleo's firm nipples hard enough to cut glass.  Of course!  Look how much
bigger they were!  They had doubled, even tripled in size since they
started this marathon lovemaking.  If Cleo hadn't torn the algae bra from
her chest, she most certainly would have ripped right through it.  In fact,
she was getting so big that Lewis, feeling around underneath her gigantic
tits, thought he felt two MORE tits beginning to develop underneath Cleo's
already huge breasts.  Four boobs!  And each one now practically dripping
with milk.  So THAT's where mermen get the moisture for their sperm!

   Lewis latched on to one of Cleo's lactating nipples.  No sooner was it
in mouth that Cleo let out a HUGE sigh of relief, and milk began gushing
from all four nipples with the same ferocity that Lewis's neverending river
of cum spouted within her.  With Cleo's sweet, sugary, warm milk to provide
him with the proper nutrients, Lewis suddenly perked up and began thrusting
his dick into Cleo with a renewed vigor.  Cleo moaned softly as the
pressure on her tits gave way to the soft, soothing flow of milk, as she
expressed more and more of it into Lewis's eager mouth.  She cooed softly,
feeding him, acting as a mother to him all while her mermaid parts ravaged
his penis for every available drop of cum.  She then screamed loudly as
one, final, intense, blazing orgasm rushed through her, every muscle in her
body contracting all at one, and then releasing in one wave of relief.

   As her body relaxed, the pressure on Lewis's penis released, and soon
Cleo's tail was glowing again.  In a flash, she was human once more, and
Lewis was free from her vaginal grasp.  Despite the danger, they had both
thoroughly enjoy the most intense sexual experience of their young lives,
and as Cleo lay on the ground, panting, resting nude, Lewis was pleased to
note that she had retained at least some of the breast enlargement that she
had gained as a mermaid.  No, they weren't as big as they had been prior to
milking, and the two little mini-breasts that had started to bud had
retreated back into her torso, so she looked once more like a perfectly
ordinary - although very sexy - nude teenage girl.  With only slightly
larger breasts than before, of course.  Cleo sat up - "wow," she said. 
"That was incredible."

   Lewis wondered if she really understood any of what they had just been
through, but now that he knew what to expect, he was eager to try it all
over again.  The now-fully-human Cleo and Lewis, or "Clewis," got dressed
together, but they knew they would be making love again before the night
was out.