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 genu with his dick hanging down from him. He looks to his rightfulness and see his twin sister ally in the Same attitude. This was the first fourth dimension he had seen her defenseless in awhile and she was hot with her b cup titmouse hanging down. The room is black with many abandon stalls around. Then the doorway to the stable open and sunlight outpouring the room making matte have to squint his eyes to see what is happening. The threshold closes quickly and he can clearly see a man walking into the room with a big bag. He walks over to his twin sister and him and puts the bag on the work 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 sure qualities… ''

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

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

He then walks over to matte and says, `` We will part with you. ``

Then he opens his bag and takes out some lubricant and an assortment of dildos. He puts on a baseball mitt and bind his digit into the lube.

Matt can see what he is doing and commence to protest but his voice is cut short when he forcefully sticks two of his digit into his ass. The touch sensation is Weird. It is painful and pleasurable at the Lapplander prison term. It is all over quickly though as he retracts his two fingers covered in lube and walks over and takes a 6 inch dildo and manner of walking over and places the tip on lusterlessness 's ass.

'' If you are going to do by what happens next, we are going to need to loosen 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 in and starts to thrust it back and forth creating a rhythm. flatness oink from elbow grease 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 blunder.

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 inch dildo and does the like thing. The 8 inch dildo makes Matt feel fuller then the 6 inch dildo. As he is ramming the dildo in he can start to experience his ass getting loose and looser.

After about five minutes of the man ramming the dildo in his ass the man says to him, `` You are almost ready, there is just one more affair I have to do to you to get you prepare for the main event, I have to strip you from the inside out. ``


He then goes over to his bag and takes out a metro attached to a big urine bag. He goes over to a hose on the rampart and fills the water bag full of water. The bag must induce been big enough to hold a gallon. Then he takes the bag and hangs it on a hook above him that Matt had not noticed before. Matt think he recognizes the bag from some of the porn he watched. It was an enema, he thought to himself. He then takes the tube and proceeds to puzzle it right into his already loosened ass.

'' I am going to involve you to be really clean in there if my experiment is going to operate '', the man says.
He then turns a valve and the water starts to flow into his ass. Matt can feel the cold water period into his ass making it flesh out. After a minute he can feel his belly start to flesh out and he looks back and his belly looks like he is fraught. Finally the man closes the valve and slowly starts to occupy the enema tube out of his ass. As soon as he does this, some brown liquid 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 clyster metro back in

lustrelessness 's ass and does 3 times before the fluid that comes out of his ass is clear.

The man then pulls out walkie-talkie and says into it, `` He is cook, bring him in. ``

lustrelessness turns around and sees the doors to the b 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 turncock. Before long a 2 invertebrate foot long cock springs out from the horse.

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

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

The man then presses a clitoris on his remote control and the shoulder strap holding his workforce 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 political program stops at the perfect height for the sawhorse to penetrate his ass. The stallion then rears up and places both its hooves on a bar so that the hooves will not be on flatness. Then the stallion starts to push up searching for his hole. lusterlessness starts to devise himself for the inevitable. Finally after four or five missed thrust, the horse finds his hole. At start the horse can only fit the Malus pumila sized tip of his dick into his ass. The horse then begins to force his dick further and further into his ass. Finally, after a yoke of minutes of the horse going deeper and cryptical into his ass the sawhorse bottoms out and standpoint still for a mates of second base. The pain is excruciating. lusterlessness almost blacks out from having the horse dick so far up his ass. Then the knight pulls out six in and driving force. He repeats this natural action and then forms a constant musical rhythm. The pain begins to lessen and the pleasure kicks in. Before long he can feel his own gumshoe start to shoot off on the flooring. Then after ten minutes of straight fucking from the buck, he can feel the sawbuck 's balls tense up. The buck then bottoms out and his dick erupts with cum. The hot fluid feels so upright inside his virgin ass. The rope of cum cover the inside of his ass and begins to make his ass expand. The Equus caballus keeps cumming for about a bit. Finally the horse occlusive and right as the horse pulls its pecker out of him the man puts a but fire hydrant in.

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



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

mat wakes up on the cold ground naked and looks at himself. His breadbasket bulged with all the cum inside of him and his ass ached and matt tries to support up but can not. He looks around and saw that he is in a Equus caballus unchanging. He then turns and looks at his Gemini sister lying adjacent to him naked. She too had a stomach that bulged like she was pregnant too but she still looked sexy. Matt could see her B-cup knocker because she was lying on her cover and her beautiful pussy with just a little tuft of hair at the top of her slit. His hammer starts to grow but at that same moment she woke up.

'' What happened '', proclaims Ally.

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

matt looks over at friend and says, `` Did the horse… ''

'' Fuck my pussy, says ally, `` Yeah ''

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

'' Rise and gleam son and girls '', the man says, `` I bet you have been wondering what the experimentation I
preformed on you was for. I didn't want to tell you yesterday to spoil the surprise 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 animate being. I also modified the time the pregnancy will take to stimulate it go from 9 calendar month to 1 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 intellect I wanted to do this was because I wanted to create the greatest horse ever. I could not do this with mating 2 sawhorse together but I had to mate a horse with a human being because with a homo, the sawbuck can be very intelligent. The reason I picked you 2 was because you both have high IQ 's, are gymnastic and it looked like you could handle this. And I thought it would be fun to sustain a brother and Sister. Oh, and by the way, my name is Dr. Jekyll Any dubiousness ? ``

Matt speaks up, `` You can not be serious, there is no way that I can be… fraught. ``

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

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

'' Well your trunk will be changing to adapt the foals but it will still ache very much '', Dr. Jekyll
says, '' It will probably suffer to a greater extent than a normal maternity so be prepared. You will quell here in this stable for the residuum of this pregnancy. Oh, and one Thomas More thing. ``

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

He then walks out of the stable leaving Matt and Ally laying in piles of cum. They both sighed out of
alleviation when the cum was finally out of their snatch and asses.

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

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

lusterlessness then lays on the flat coat in his kitty of cum, thinking about the events that happened yesterday. Then the man walks into the stable and says, `` Here 's dinner. ``

Then he walks out of the room. flatness front crawl over and gets the 2 buckets and brings them over to friend.
Ally gives Matt a puzzled look and he just shrugs it off. He then takes a handful of the texture and puts eats it. `` It 's not that bad '', says Matt.

'' Yeah right '', says Ally

She then tries the grain and agrees with matte. They could birth probably eaten anything at the import.
They had not eaten anything in awhile and they were both very hungry. They then took crook sipping piddle from the bucketful until the bucketful was drained. They then fall asleep on the cold concrete.

lusterlessness wakes up first the succeeding morn and tactile property unlike. He feels a weighting on his chest and looks down and sees that he has some A-Cup tit. His hips had widened too and his stomach was a lilliputian bloated. His ass also did not feel sore anymore. He looks over and sees his sis awake as well. He could see that she also had changes. Her articulatio coxae 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 funny '', Matt says to Ally.

'' Nothing '', Ally says, `` That was quite the experience we had yesterday. ``

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

'' Yeah '', ally says, `` The horses big dick felt so full in my pussy. The near constituent was when he cummed, it
was so majuscule that it gave me the Charles Herbert Best orgasm I had ever had. ''

'' Are those tangible ? '' Ally says pointing to her buddy tits.

'' Yeah, unfortunately they are. I think that this is one of the English gist. '' matte says, `` experience them if you do not think me. ''

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

lustrelessness then places his manus on his sisters B-Cup teat. Ally too lets out a small moan as he does this. ally 's tits felt so safe in his hands. He had always admired them and now he was doing the thing he had only dreamt of doing. Her tits were the perfective sizing and they were still unwaveringly. Matt then wanted to take it a picayune further. He takes one handwriting off her tit and started to move it down her physical structure. He reaches her clit and starts to rub it.

Her body shook violently as the orgasm went through her whole consistence. After the climax was over, she said to her sidekick, `` Now your turn. ``

She then grabbed his already hard rooster and put it into her mouth. She started to take up his cock and massaging his nut at the same time. Matt could sense his babe sucking on his stopcock, licking the tip every once in awhile. Then he could feel his balls tense up and he said to ally, I am going to cum. '' Matt could then feel Ally start to deep throat his stopcock. lustrelessness then erupted with cum and then bourgeon it all down his sister throat.

matt then took his peter out of his sis throat and picked her up and laid her in a nook on the hay. He then took his 8 column inch putz and directed it into her awaiting kitty-cat. He pushed in slowly not wanting to hurt his sister. Finally after a picayune of pushing, he could find his balls rub up against her ass.

'' Are you ready '', asks Matt.

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

Matt then pulls out and mosh into his babe. He then started a rhythm and he could sense the precum dripping out. His cock look so good with his sisters pussy enveloping it. After what seems like an eternity, matte can feel his Lucille Ball tense up and he goes hilt deep and seed into his babe as hard as he can.

They both lay there for a few bit with matte 's gumshoe still in his sisters pussy and that 's when they heard mortal clapping.

Dr. Jekyll had been watching the whole thing and was astonished. He had never thought that this would happen. He then said, `` assassinator you two. That was quite the show. ''

lusterlessness and Ally both blushed as they both thought about what just happened. What made it even worse was that someone had seen them do it. Matt then pulled his semi knockout prick out of his baby pussy and a little stream of cum followed after that.

After a few awkward mo, the Dr. Jekyll says, `` Well the reason I came here was because I needed to run your tiddler '', pointing towards there bulging stomachs, `` The ripe way to do that is by the semen from their forefather. ``

He then leads the two of them out of a stall and into another stall where both their cavalry were kept.
The black one was Ally 's and the brown one was mat 's. `` Well, I will allow for you two to get to it '', Dr. Jekyll says as he backs out of the room.

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

Matt scout as his sister takes the huge horse peter and sticks it in her mouth and starts to suck on it. Matt then watched as she took her hands and started to jack off the horses massive dick. Soon he can see the cavalry lump tense up and he knew what was going to happen. He could see her struggling to swallow the massive amounts 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 bantam body. This turned flatness on very much and soon he had a big boner watching the buck cum all over his Sister.

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

flatness had not been thinking about what was about to happen. He walks over to his Brown sawhorse and starts to rub its cock. Soon the cock is at wax length and Matt just stares at it.

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

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

Matt then takes the whole stopcock and puts it into his mouth. He starts to suck on it at the same time jacking off the horse with his hands. flatness loves sucking the buck cock. He can taste the precum oozing from the horses prick and he loves it. Soon the horse Lucille Ball tense up and send ropes of cum down lustrelessness 's throat. Before farseeing Matt 's tum is full and he pulls out the cock from his mouth. The horses dick then starts to bourgeon cum all over Matt 's body covering him from fountainhead to toe.

Dr. Jekyll then walks into the room and says to the twins, `` Oh, you two are a tidy sum, go back to your stable. '' Matt and Ally comply and follow them back to their horse barn. He then puts a bucket of inhuman water and a horse clash and says to them, `` You two should probably make clean up. ''

They then grab the bucket and begin to scrub each former with it focusing on the `` sensitive '' areas mostly. This subroutine goes on everyday for a twain of weeks. They wake up, have sex, get covered in cum, and then lave each early. Their eubstance go through many more changes as well. Both of their rosehip get wide enough to accommodate the horse cavalry. There tits swell up in size too. They go all the way to the D-Cup and contain. Their endure keep expanding rapidly in size too. With about a hebdomad left, it looks like they are both having quadruplets in their stomach. They have to cease having sex because their bellies are so big but they can still feel each former up.

Then one day, Dr. Jekyll walks in the elbow room with a box full moon of dildos. He says to the Gemini, `` Here, these are for mat. If you want to deliver this sawbuck without any price then you will demand to work on on making your rectum big enough to accommodate this horse."

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

'' You should be alright, women are meant to generate birth and I think that your vagina will do just fine. ``

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

'' Want to serve '', lustrelessness say to Ally.

'' for sure '', Ally says, `` Now get into the position. ''

Matt gets on his handwriting and articulatio genus and Ally chooses the smallest dildos and penetrates matt 's ass slowly. Matt groan because he had been craving having the buck dick in his ass for awhile but he knew that it would offend the foal. She then worked her way up to the adult dildo which was as wide as the horse cavalry cock. She did this every day until one day matt had some sharp botheration in his stomach and soon after his sis did too.

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

Dr. Jekyll then came running in and says, `` The display has just begun '', and brings a chairman over to watch the festivities. They went through contraction after contraction together until 12 hours in, mat felt that he needed to promote. He started to crowd and could finger the sawbuck sliding down his colon. He pushed and pushed until he looked back and could see the head out. `` Almost there '', lustrelessness thought. The infliction was excruciating. He kept pushing and pushing until the front legs popped out, then the back legs popped out after and he was done. His foal crawled over to him and Matt pulled off the membrane from around it. The horse then started to soak up on Matt 's tit. The feeling was amazing as he could feel the Milk River leaving his torso and into his horse.

'' Nice job matte '', Dr. Jekyll says, `` That is a beauty. ``

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

'' You are doing well '', mat says encouragingly, `` Almost there. ''

matte can see the oral sex start to come out of his sis pussy. Ally keeps pushing and soon the front stage pop out and finally the cover legs. ally sighs as her foal finally comes out. The two twins then fall asleep with their infant sucking on their tits.

They wake up the following day and they both feel different. Their torso had gone back to normal. Matt no longer had tits and widened hips and friend mammilla and hips had gone done in size as well. They were perplexed. Then they could hear the b doors spread out and in walked Dr. Jekyll into their stall.

'' hullo '', Dr. Jekyll says to the Twin Falls, `` You two did a nice job yesterday. ''

He looked at their perplexed looking at and says, `` There was one more than thing that I did not severalize you about when I modified your soundbox. After you give birth, the changes that were made revert back and you look just like you did a calendar month ago. Unless you want to keep the changes. ``

'' No, no '', says the twins 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. Well, when I kidnapped you, your parents were going to send out you to camp out for a month and I have been sending them varsity letter 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 nascence. Are we clear ? ``

They both nod in agreement. He then tosses in some clothes and tells them to get do

Matt had gotten so habituate to be naked all the time that the dress feel weird. They then look at each former and Matt knows that life sentence will never be the same .