Matt wakes up and looks around groggily at his surroundings thinking to himself, what just happened. It appears that he was in a stable and was naked on his hands in articulatio genus with his putz hanging down from him. He looks to his right and see his twin sister friend in the same view. This was the first time he had seen her bare in awhile and she was hot with her b cup pap hanging down. The room is dark with many empty stables around. Then the doorway to the stable open and sunshine flood the elbow room making matte have to squint his eyes to see what is happening. The door closes quickly and he can clearly see a man walking into the room with a big bag. He walks over to his Twin Falls Sister and him and puts the bag on the bench and starts to talk to them.

'' I bet you are wondering why you are here '', he says.

His sister and him don't respond.

'' You are here because we are doing an experiment and you were chosen because of some certain qualities… ''

'' But we are only 16 '', matte pleads.

The man continues, `` This experiment will hurt, I will tell you that, but when it is over we will cause created something miraculous. ``

He then walks over to Matt and says, `` We will start with you. ``

Then he opens his bag and takes out some lubricating substance and an mixture of dildos. He puts on a glove and amaze his digit into the lube.

matte can see what he is doing and begin to protest but his voice is cut shortsighted when he forcefully sticks two of his finger's breadth into his ass. The touch sensation is Weird. It is painful and pleasurable at the Lapplander fourth dimension. It is all over quickly though as he retracts his two fingers covered in lube and walks over and takes a 6 column inch dildo and walkway over and places the tip on lustrelessness 's ass.

'' If you are going to handle what happens succeeding, we are going to want to tease apart you up first '', the man says.

He pushes the dildo slowly into his ass before finally bottoming out. The Same feeling comes over him as Matt can feel the dildo inside of him. He then takes it back a few column inch and starts to hurl it back and Forth creating a rhythm. matt oink from exertion as he is doing this. Then something really weird happens, he starts to get a boner. He had never been gay in his life so he thinks that it is odd that he gets a boner.

The man then says as he is ramming the dildo into his ass, `` Oh so you like this '', while still ramming the dildo into his ass. He then goes back to his bag and takes out an 8 in dildo and does the same thing. The 8 column inch dildo makes Matt feels fuller then the 6 inch dildo. As he is ramming the dildo in he can start up to sense his ass getting looser and looser.

After about five instant of the man ramming the dildo in his ass the man says to him, `` You are almost gear up, there is just one More thing I have to do to you to get you ready for the chief event, I have to cleanse you from the interior out. ``


He then goes over to his bag and takes out a tubing attached to a big water system bag. He goes over to a hose on the wall and fills the water bag full phase of the moon of water. The bag must throw been big enough to halt a gallon. Then he takes the bag and hangs it on a hook shot above him that lustrelessness had not noticed before. flatness think he recognizes the bag from some of the porn he watched. It was an enema, he thought to himself. He then takes the vacuum tube and proceeds to bind it right into his already loosened ass.

'' I am going to necessitate you to be really clear in there if my experiment is going to work '', the man says.
He then turns a valve and the water starts to flow into his ass. matt can feel the cold water flow into his ass making it expand. After a arcminute he can feel his belly go to inflate and he looks back and his belly looks like he is pregnant. Finally the man closes the valve and slowly starts to take the enema tube out of his ass. As soon as he does this, some dark-brown fluid shoots out of his ass and onto the floor. It feels really weird having the liquid shoot out of Matt 's ass. He then proceeds to put the enema pipe back in

lusterlessness 's ass and does 3 clock time before the fluid that comes out of his ass is clear.

The man then pulls out walky-talky and says into it, `` He is ready, bring him in. ``

Matt turns around and sees the doors to the barn open and a man walks in directing a stallion behind him. `` Oh no '', Matt thinks to himself, `` this ca n't be. ``

The man then walks over to the stallion and starts to rub it cock. Before long a 2 foot tenacious cock leaping out from the horse.

lusterlessness says to the man, `` There is no way that this horses stopcock will fit in my ass. ``

'' wellspring it has to '', the man says.

The man then presses a clitoris on his remote and the straps holding his deal and leg to the ground tighten and he is lifted up into the air on a platform that he was on that he had not noticed before. The platform stops at the perfective tense height for the horse to diffuse his ass. The stallion then rears up and shoes both its hooves on a bar so that the hooves will not be on Matt. Then the entire starts to shove searching for his pickle. flatness starts to fix himself for the inevitable. Finally after four or five missed push, the horse finds his kettle of fish. At first base the buck can only fit the apple sized tip of his hawkshaw into his ass. The horse then begins to push up his prick further and further into his ass. Finally, after a twain of minutes of the horse going abstruse and cryptic into his ass the Equus caballus bottoms out and standpoint still for a couple of seconds. The painful sensation is excruciating. matt almost blacks out from having the horse dick so far up his ass. Then the horse pulls out six inches and drive. He repeats this action and then forms a constant round. The pain begins to sink and the pleasure kicks in. Before long he can feel his own putz starting to film off on the storey. Then after ten arcminute of full-strength fucking from the horse, he can palpate the horse 's Lucille Ball tense up. The horse then bottoms out and his cock erupts with cum. The hot fluid flavour so good inside his virgin ass. The rophy of cum cover the inside of his ass and begins to make his ass expand. The sawbuck keeps cumming for about a minute. Finally the horse Newmarket and right as the horse pulls its gumshoe out of him the man puts a but plug in.

'' Now we don't need to neutralize any of that cum do we '', the man says.



He then lowers the platform and takes the straps off Matt 's legs and hands and he collapses on the ground. He feels so bloated and he looks at his tummy and it looks like he is pregnant from all the cum inside of him. He can sense it swishing around in his ass and it feels kind of good. Then he passes out on the floor….

Matt wakes up on the cold ground naked and looks at himself. His stomach bulged with all the cum inside of him and his ass ached and Matt endeavour to stand up but can not. He looks around and saw that he is in a gymnastic horse stable. He then turns and looks at his twin sister lying future to him naked. She too had a abdomen that bulged like she was meaning too but she still looked aphrodisiacal. matte could see her B-cup tits because she was lying on her backbone and her beautiful pussy with just a little tuft of hair at the top of her slit. His turncock starts to develop but at that same here and now she woke up.

'' What happened '', proclaims Ally.

'' I don't know, says Matt, `` we were going to summer camp and then… ''

Matt looks over at Ally and says, `` Did the horse… ''

'' Fuck my pussycat, says Ally, `` Yeah ''

lustrelessness then hears the door to the barn open and eyes the man as he walks into their stable.

'' Rise and shine male child and girls '', the man says, `` I bet you have been wondering what the experiment I
preformed on you was for. I didn't want to tell you yesterday to spoil the surprisal but here we go. Those 2 horses yesterday that you had a little fun with, were pattern. I genetically modified you and you sister to get impregnated by any puppet. I also modified the time the pregnancy will submit to make it go from 9 months to 1 calendar month so you will finger changes pretty soon. Another thing is that the reason I plugged up your holes from letting the cum seep out was because the creatures cum takes about 4 time of day to impregnate you. The reason I wanted to do this was because I wanted to create the bully Equus caballus ever. I could not do this with mating 2 gymnastic horse together but I had to twin a sawhorse with a man because with a human, the cavalry can be very intelligent. The reason I picked you 2 was because you both have high gear IQ 's, are gymnastic and it looked like you could handle this. And I thought it would be fun to experience a brother and sister. Oh, and by the way, my name is Dr. Jekyll Any questions ? ``

flatness speaks up, `` You can not be dangerous, there is no way that I can be… meaning. ``

'' Oh, I am quite serious '', Dr. Jekyll says, `` I have given you, ah I don't want to get into specifics. Any more inquiry ? ``

'' Yeah '', ally says, `` How will the foal come out of our… ''

'' Well your bodies will be changing to accommodate the foals but it will still smart very lots '', Dr. Jekyll
says, '' It will probably hurt more than a pattern gestation so be prepared. You will stay here in this stable for the remainder of this pregnancy. Oh, and one more thing. ``

Dr. Jekyll then walks over to lusterlessness and pulls out the but plug holding all the gymnastic horse cum inside of him. The cum shoots out of his ass and all over the concrete floor of the stable. He then pulls the stopple out of
Ally and says, `` Well I hope that this semen did its thing. ''

He then walks out of the horse barn leaving Matt and Ally laying in piles of cum. They both sighed out of
rest when the cum was finally out of their kitty and asses.

'' What are we going to do now '', exclaims Ally.

'' I don't know '', says Matt.

mat then lays on the footing in his pool of cum, thinking about the outcome that happened yesterday. Then the man walks into the stalls and says, `` Here 's dinner. ``

Then he walks out of the elbow room. Matt crawling over and gets the 2 bucket and brings them over to Ally.
Ally gives Matt a amaze look and he just shrugs it off. He then takes a handful of the grain and puts grub it. `` It 's not that bad '', says Matt.

'' Yeah rightfield '', says ally

She then tries the food grain and agrees with Matt. They could stimulate probably eaten anything at the moment.
They had not eaten anything in awhile and they were both very hungry. They then took turns sipping water system from the bucket until the bucket was drained. They then fall asleep on the dusty concrete.

matt wakes up first the next dawning and look dissimilar. He feels a weightiness on his chest and looks down and sees that he has some A-Cup mamilla. His hips had widened too and his stomach was a small bloated. His ass also did not feel sore anymore. He looks over and sees his babe awake as well. He could see that she also had modification. Her hips had widened and her tits went from an A to a B-cup. He then hears a giggle come from his sister.

'' What 's so good story '', matt says to Ally.

'' naught '', ally says, `` That was quite the experience we had yesterday. ``

'' Yeah '', Matt says, `` It hurt at first but after awhile it felt really good. ``

'' Yeah '', ally says, `` The horses big putz felt so good in my twat. The upright part was when he cummed, it
was so smashing that it gave me the secure coming I had ever had. ''

'' Are those real ? '' Ally says pointing to her blood brother tits.

'' Yeah, unfortunately they are. I think that this is one of the slope effects. '' matt says, `` finger them if you do not believe me. ''

She then walks over to lusterlessness and places her hands on his tits. lusterlessness was shaking in anticipation for this and lets out a minor moan as she places her hands on his tits and starts to feel around. friend then said to him, `` You can feel my titmouse if you want. ``

Matt then places his men on his sisters B-Cup tits. Ally too lets out a minuscule moan as he does this. Ally 's bosom felt so practiced in his hands. He had always admired them and now he was doing the affair he had only dreamt of doing. Her tits were the perfect size of it and they were still unshakable. lusterlessness then wanted to take it a footling further. He takes one hand off her tit and started to move it down her soundbox. He reaches her clit and starts to rub it.

Her physical structure shook violently as the coming went through her unharmed trunk. After the climax was over, she said to her brother, `` Now your spell. ``

She then grabbed his already hard cock and put it into her backtalk. She started to suck his cock and massaging his musket ball at the Lapplander prison term. Matt could feel his sister sucking on his shaft, licking the tip every once in awhile. Then he could experience his Lucille Ball tense up and he said to ally, I am going to cum. '' Matt could then feel Ally pop out to deep throat his putz. Matt then erupted with cum and then shot it all down his sisters throat.

Matt then took his turncock out of his sisters pharynx and picked her up and laid her in a corner on the hay. He then took his 8 in cock and directed it into her awaiting pussy. He pushed in slowly not wanting to hurt his Sister. Finally after a little of pushing, he could feel his balls rub up against her ass.

'' Are you fix '', asks Matt.

'' devote it to me '', replies Ally.

mat then pulls out and slams into his sister. He then started a rhythm and he could find the precum dripping out. His cock feels so unspoilt with his Sister pussy enveloping it. After what seems like an eternity, Matt can finger his balls tense up and he goes hilt deep and cums into his babe as hard as he can.

They both lay there for a few consequence with mat 's gumshoe still in his sister pussy and that 's when they heard individual clapping.

Dr. Jekyll had been watching the unscathed matter and was astonished. He had never thought that this would materialise. He then said, `` Bravo you two. That was quite the show. ''

mat and Ally both blushed as they both thought about what just happened. What made it even worse was that somebody had seen them do it. flatness then pulled his semitrailer firmly dick out of his sisters pussy and a slight current of cum followed after that.

After a few awkward instant, the Dr. Jekyll says, `` Well the reason I came here was because I needed to fertilise your kids '', pointing towards there bulging stomachs, `` The honorable way to do that is by the cum from their fathers. ``

He then leads the two of them out of a carrell and into another stall where both their horses were kept.
The black one was Ally 's and the Brown University one was Matt 's. `` fountainhead, I will go forth you two to get to it '', Dr. Jekyll says as he backs out of the way.

They both stand there for a few minutes when Ally says, `` Well I will go first to show you how it is done. ''

flatness watches as his sis takes the huge sawhorse cock and sticks it in her rima oris and starts to suck on it. Matt then watched as she took her mitt and started to jack off the Equus caballus massive pecker. Soon he can see the horses balls tense up and he knew what was going to happen. He could see her struggling to bury the massive sum of cum from the horses but soon he could see that she couldn't take it any more so she pulled the horses cock out of his mouthpiece as it was still cumming and it cummed all over her petite eubstance. This turned Matt on very much and soon he had a big fuckup watching the horse cum all over his babe.

Soon the horse was done and Amy turned toward his her brother and said, `` Now it 's your turn '',

lusterlessness had not been thinking about what was about to pass. He walks over to his brown knight and starts to rub its rooster. Soon the rooster is at good length and Matt just stares at it.

'' I do n't remember I can do this '', he says to Ally.

'' Yes, you can, just do what I did '', friend says encouragingly.

Matt then takes the unanimous dick and puts it into his mouth. He starts to suck on it at the same time jacking off the buck with his workforce. Matt loves sucking the horses cock. He can taste the precum oozing from the sawbuck slit and he loves it. Soon the horse cavalry balls tense up and send roofy of cum down lustrelessness 's pharynx. Before long flatness 's tummy is to the full and he pulls out the cock from his sassing. The horse dick then starts to shoot cum all over matte 's body covering him from pass to toe.

Dr. Jekyll then walks into the room and says to the twins, `` Oh, you two are a good deal, go back to your stable. '' Matt and ally comply and follow them back to their static. He then puts a bucket of cold water system and a horse brush and says to them, `` You two should probably make clean up. ''

They then grab the bucket and get to scrub each other with it focusing on the `` spiritualist '' orbit mostly. This quotidian goes on everyday for a couple of weeks. They wake up, have sex, get covered in cum, and then wash each other. Their trunk go through many more variety as well. Both of their hips get wide enough to accommodate the cavalry. There tits swell up in size of it too. They go all the way to the D-Cup and block. Their belly keep expanding rapidly in size too. With about a workweek left, it looks like they are both having quadruplets in their stomachs. They have to break having sex because their bellies are so big but they can still sense each other up.

Then one day, Dr. Jekyll walks in the room with a box replete of dildos. He says to the twins, `` Here, these are for Matt. If you want to deliver this sawbuck without any harm then you will require to work on making your rectum big enough to accommodate this horse."

'' What about me ? ``, says Ally.

'' You should be OK, women are meant to open parentage and I think that your vagina will do just fine. ``

The man leaves and Matt goes over and looks at the dildos. They are not that long but some of the cinch of the dildos were immense.

'' Want to help '', Matt say to Ally.

'' sure '', Ally says, `` Now get into the stance. ''

Matt gets on his hands and genu and Ally chooses the smallest dildos and penetrates lusterlessness 's ass slowly. lustrelessness moan because he had been craving having the horses dick in his ass for awhile but he knew that it would hurt the foal. She then worked her way up to the biggest dildo which was as wide as the horse cavalry pecker. She did this every day until one day Matt had some knifelike pains in his stomach and soon after his babe did too.

They both knew that their foals were coming and started to get up their selves. Out of instinct, they both lay on their sides because that is how horses normally give parturition. They both yelled as they went through the first muscle contraction.

Dr. Jekyll then came running in and says, `` The display has just begun '', and brings a chair over to watch the festivities. They went through contraction after muscular contraction together until 12 hours in, matt felt that he needed to campaign. He started to labour and could feel the sawhorse sliding down his colon. He pushed and pushed until he looked back and could see the head out. `` Almost there '', Matt thought. The pain was excruciating. He kept pushing and pushing until the figurehead leg popped out, then the back stage popped out after and he was done. His foal crawled over to him and lustrelessness pulled off the membrane from around it. The horse then started to nurse on Matt 's tit. The feeling was amazing as he could experience the Milk River leaving his body and into his horse.

'' Nice job Matt '', Dr. Jekyll says, `` That is a smasher. ``

Matt looks over at Amy and sees that she is struggling to get the foal out of her.

'' You are doing well '', Matt says encouragingly, `` most there. ''

Matt can see the head showtime to come up out of his babe pussy. Ally keeps pushing and soon the front legs pop out and finally the back legs. Ally sighs as her foal finally comes out. The two Gemini then fall asleep with their babies sucking on their tits.

They wake up the next day and they both feel different. Their trunk had gone back to normal. Matt no longer had tits and widened pelvis and ally tits and rose hip had gone done in sizing as well. They were perplexed. Then they could pick up the barn door undefended and in walked Dr. Jekyll into their stall.

'' Hello '', Dr. Jekyll says to the Gemini, `` You two did a decent job yesterday. ''

He looked at their perplexed looks and says, `` There was one to a greater extent thing that I did not tell you about when I modified your consistence. After you give nascence, the variety that were made revert back and you look just like you did a month ago. Unless you want to keep the change. ``

'' No, no '', says the counterpart in unison.

'' Ok, I bet you have been wondering what your parents are going to think when you come back after being gone for a month. fountainhead, when I kidnapped you, your parents were going to send you to camp for a month and I have been sending them letters about all the fun you have been having. Do not tell anyone about what happened today unless you want me to release a picture documenting what happened. From you having sex with each other, with a horse, and giving birthing. Are we realize ? ``

They both nod in arrangement. He then tosses in some clothes and tells them to get dressed

Matt had gotten so used to be naked all the time that the dress feel Weird. They then look at each other and Matt knows that lifespan will never be the Saame .