Matt wakes up and looks around groggily at his surroundings thinking to himself, what just happened. It appears that he was in a unchanging and was naked on his manpower in stifle with his dick hanging down from him. He looks to his right and see his twin sister Ally in the same position. This was the foremost time he had seen her raw in awhile and she was hot with her b cup tit hanging down. The room is dark with many empty horse barn around. Then the room access to the stable open and sun floods the room making matt have to squint his eyes to see what is happening. The doors closes quickly and he can clearly see a man walking into the room with a big bag. He walks over to his counterpart babe 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 sis 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 '', flatness pleads.

The man continues, `` This experiment will hurt, I will say you that, but when it is over we will have created something marvelous. ``

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

Then he opens his bag and takes out some lube and an assortment of dildos. He puts on a glove and sticks his finger into the lube.

Matt can see what he is doing and start out to resist but his representative is cut light when he forcefully sticks two of his finger into his ass. The feeling is weird. It is painful and gratifying at the same meter. It is all over quickly though as he retracts his two fingers covered in lubricator and walks over and takes a 6 in dildo and pass over and places the tip on matt 's ass.

'' If you are going to handle 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 Saami tactual sensation comes over him as lustrelessness can sense the dildo inside of him. He then takes it back a few inches and starts to thrust it back and Forth creating a rhythm. Matt 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 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 affair. The 8 inch dildo makes matt feel Fuller then the 6 inch dildo. As he is ramming the dildo in he can take up to palpate his ass getting promiscuous and looser.

After about five minute of the man ramming the dildo in his ass the man says to him, `` You are almost ready, there is just one More matter I have to do to you to get you set for the primary outcome, I have to clean you from the inside out. ``


He then goes over to his bag and takes out a electron tube attached to a big water bag. He goes over to a hose on the wall and fills the urine bag full of piss. The bag must have been big enough to sustain a gallon. Then he takes the bag and hangs it on a hook above him that flatness had not noticed before. mat think he recognizes the bag from some of the porn he watched. It was an enema, he thought to himself. He then takes the metro and yield to stick it right into his already loosened ass.

'' I am going to need you to be really clean in there if my experiment is going to function '', the man says.
He then turns a valve and the water starts to run into his ass. Matt can feel the cold water flow into his ass making it flesh out. After a minute he can sense his belly start to dilate and he looks back and his belly looks like he is meaning. Finally the man closes the valve and slowly starts to select 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 trading floor. It feels really Wyrd having the liquid shoot out of Matt 's ass. He then proceeds to put the clyster pipe back in

Matt 's ass and does 3 times 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 threshold to the b clear and a man walks in directing a stallion behind him. `` Oh no '', flatness 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 pes prospicient putz fountain out from the horse.

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

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

The man then presses a button on his remote control and the straps holding his hired hand and branch to the ground tighten and he is lifted up into the air on a political platform that he was on that he had not noticed before. The political program stops at the utter tallness for the horse to penetrate his ass. The stallion then rears up and stead both its hooves on a bar so that the hooves will not be on Matt. Then the stallion starts to thrust searching for his cakehole. Matt starts to prepare himself for the inevitable. Finally after four or five missed thrust, the horse finds his cakehole. At initiatory the horse can only fit the Malus pumila sized tip of his dick into his ass. The sawbuck then begins to thrust his dick further and further into his ass. Finally, after a couple of minutes of the horse going cryptical and deeper into his ass the cavalry bottoms out and point of view still for a couple of s. The pain is excruciating. matt almost blacks out from having the horse cock so far up his ass. Then the Equus caballus pulls out six in and thrusts. He repeats this action and then forms a never-ending rhythm. The pain in the neck begins to subside and the delight kicks in. Before long he can finger his own dick start to shoot off on the floor. Then after ten minutes of straight fucking from the horse, he can feel the horse 's nut tense up. The horse then bottoms out and his dick erupts with cum. The hot fluid tone so good inside his virgin ass. The circle of cum cover the interior of his ass and begins to make his ass expand. The knight keeps cumming for about a minute. Finally the horse block and right wing as the knight pulls its dick out of him the man puts a but wad 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 peg and hands and he collapses on the earth. He feels so bloated and he looks at his stomach and it looks like he is pregnant from all the cum interior of him. He can feel it swishing around in his ass and it feels variety of good. Then he passes out on the floor….

Matt wakes up on the low temperature footing naked and looks at himself. His abdomen bulged with all the cum inside of him and his ass ached and Matt tries to tolerate up but can not. He looks around and saw that he is in a horses stable. He then turns and looks at his twin sister lying following to him naked. She too had a stomach that bulged like she was pregnant too but she still looked sexy. matte could see her B-cup breast because she was lying on her back and her beautiful snatch with just a picayune tuft of fuzz at the top of her slit. His dick starts to grow but at that Lapplander moment 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… ''

'' screw my pussy, says Ally, `` Yeah ''

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

'' Rise and shine boys 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 surprise but here we go. Those 2 horses yesterday that you had a minuscule fun with, were normal. I genetically modified you and you sister to get impregnated by any beast. I also modified the prison term the maternity will take to prepare it go from 9 months to 1 month so you will feel changes pretty soon. Another thing is that the intellect I plugged up your jam from letting the cum seep out was because the tool cum takes about 4 hr to impregnate you. The ground I wanted to do this was because I wanted to create the greatest horse ever. I could not do this with mating 2 horses together but I had to mate a cavalry with a human because with a human, the gymnastic horse can be very intelligent. The reason I picked you 2 was because you both have high up IQ 's, are athletic and it looked like you could handle this. And I thought it would be fun to make a brother and sister. Oh, and by the way, my epithet is Dr. Jekyll Any head ? ``

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

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

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

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

Dr. Jekyll then walks over to Matt and pulls out the but secure holding all the horse cavalry cum inside of him. The cum shoots out of his ass and all over the concrete base of the stalls. He then pulls the plug out of
Ally and says, `` Well I hope that this ejaculate did its thing. ''

He then walks out of the stable leaving Matt and Ally laying in piles of cum. They both sighed out of
rest when the cum was finally out of their cunt and tooshie.

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

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

Matt then lays on the ground in his pool 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. matte crawling over and gets the 2 bucket and brings them over to friend.
ally gives lustrelessness a vex looking and he just shrugs it off. He then takes a handful of the cereal and puts eats it. `` It 's not that bad '', says Matt.

'' Yeah right '', says Ally

She then tries the grain and agrees with lusterlessness. They could have probably eaten anything at the consequence.
They had not eaten anything in awhile and they were both very thirsty. They then took bout sipping body of water from the bucket until the bucketful was drained. They then fall asleep on the cold concrete.

lusterlessness wakes up first the succeeding dayspring and tactile property unlike. He feels a weight on his chest and looks down and sees that he has some A-Cup tits. His hips had widened too and his belly was a little bloated. His ass also did not experience sore anymore. He looks over and sees his baby awake as well. He could see that she also had variety. Her pelvic arch had widened and her tits went from an A to a B-cup. He then hears a giggle cum from his sis.

'' What 's so rummy '', matte says to Ally.

'' cypher '', friend says, `` That was quite the experience we had yesterday. ``

'' Yeah '', Matt says, `` It hurt at get-go but after awhile it felt really honest. ``

'' Yeah '', ally says, `` The horses big dick felt so good in my slit. The effective part was when he cummed, it
was so bully that it gave me the best climax I had ever had. ''

'' Are those real ? '' friend says pointing to her sidekick tits.

'' Yeah, unfortunately they are. I think that this is one of the side event. '' flatness says, `` Feel them if you do not believe me. ''

She then walks over to Matt and places her hired man on his tit. mat was shaking in prediction for this and lets out a small moan as she places her hands on his teat and starts to feel around. ally then said to him, `` You can finger my breast if you want. ``

Matt then places his hands on his sisters B-Cup tits. Ally too lets out a small-scale moan as he does this. ally 's boob felt so ripe in his hands. He had always admired them and now he was doing the thing he had only dreamt of doing. Her breast were the perfect size and they were still steadfastly. matt then wanted to take it a petty 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 body shook violently as the orgasm went through her unanimous body. After the orgasm was over, she said to her brother, `` Now your crook. ``

She then grabbed his already strong cock and put it into her mouth. She started to wet-nurse his cock and massaging his balls at the same clip. lusterlessness could sense his sister sucking on his hammer, licking the tip every once in awhile. Then he could feel his ball tense up and he said to Ally, I am going to cum. '' lusterlessness could then feel Ally set forth to deep throat his cock. Matt then erupted with cum and then shot it all down his baby throat.

lusterlessness then took his shaft out of his baby throat and picked her up and laid her in a corner on the hay. He then took his 8 inch 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 set '', asks Matt.

'' kick in it to me '', replies Ally.

Matt then pulls out and slams into his sister. He then started a rhythm and he could sense the precum dripping out. His cock feel so estimable with his sister pussy enveloping it. After what seems like an eternity, mat can feel his balls tense up and he goes hilt oceanic abyss and semen into his sis as hard as he can.

They both lay there for a few here and now with matte 's cock still in his sisters pussy and that 's when they heard someone clapping.

Dr. Jekyll had been watching the unit thing and was astonished. He had never thought that this would go on. He then said, `` assassinator 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 someone had seen them do it. flatness then pulled his semifinal concentrated dick out of his sister pussy and a niggling current of cum followed after that.

After a few awkward seconds, the Dr. Jekyll says, `` Well the cause I came here was because I needed to feed your fry '', pointing towards there bulging stomachs, `` The best way to do that is by the semen from their fathers. ``

He then leads the two of them out of a carrel and into another stalling where both their horse cavalry were kept.
The blackness one was ally 's and the brown one was matt 's. `` well, I will leave you two to get to it '', Dr. Jekyll says as he backs out of the room.

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

Matt watches as his babe takes the huge horse putz and spliff it in her backtalk and starts to suck on it. Matt then watched as she took her hands and started to jack up off the gymnastic horse massive dick. Soon he can see the horses balls tense up and he knew what was going to happen. He could see her struggling to take back 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 mouth as it was still cumming and it cummed all over her flyspeck eubstance. This turned mat on very much and soon he had a big boner watching the horse cum all over his sister.

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

mat had not been thinking about what was about to befall. He walks over to his Brown horse and starts to rub its turncock. Soon the cock is at full length and Matt just stares at it.

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

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

matt then takes the solid cock and puts it into his backtalk. He starts to absorb on it at the Saami clock time jacking off the horse with his hands. Matt loves sucking the sawbuck cock. He can try out the precum oozing from the sawhorse scratch and he loves it. Soon the horses lump tense up and direct rope of cum down Matt 's throat. Before long Matt 's stomach is replete and he pulls out the rooster from his back talk. The knight dick then starts to tear cum all over Matt 's body covering him from head to toe.

Dr. Jekyll then walks into the way and says to the twins, `` Oh, you two are a mess, go back to your stable. '' mat and Ally comply and follow them back to their stable. He then puts a bucket of cold water and a horse cavalry light touch and says to them, `` You two should probably strip up. ''

They then grab the bucket and begin to cancel each former with it focusing on the `` tender '' country mostly. This procedure goes on everyday for a couple of workweek. They wake up, have sex, get covered in cum, and then lave each other. Their bodies go through many more changes as well. Both of their hips get all-embracing enough to reconcile the Equus caballus. There tits swell up in size too. They go all the way to the D-Cup and stop. Their bear save expanding rapidly in size of it too. With about a week left, it looks like they are both having quadruplets in their tum. They have to stop having sex because their bellies are so big but they can still feel each other up.

Then one day, Dr. Jekyll walks in the room with a box to the full of dildos. He says to the twin, `` Here, these are for Matt. If you want to surrender this buck without any price then you will call for to work on making your rectum big enough to hold this horse."

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

'' You should be alright, women are meant to give birthing 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 girths of the dildos were huge.

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

'' sure as shooting '', Ally says, `` Now get into the lieu. ''

Matt gets on his paw and knee and Ally chooses the smallest dildos and penetrates Matt 's ass slowly. Matt moans because he had been craving having the Equus caballus 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-cut as the horses dick. She did this every day until one day Matt had some astute pains in his tummy and soon after his sister did too.

They both knew that their foals were coming and started to set up their self. Out of instinct, they both lay on their slope because that is how buck normally give parentage. They both yelled as they went through the first-class honours degree contraction.

Dr. Jekyll then came running in and says, `` The show has just begun '', and brings a chair over to watch the celebration. They went through compression after contraction together until 12 hours in, matt felt that he needed to push. He started to push and could feel the horse sliding down his Colon. He pushed and pushed until he looked back and could see the straits out. `` Almost there '', mat thought. The pain was excruciating. He kept pushing and pushing until the movement stage 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 cavalry then started to nurse on Matt 's tit. The feeling was amazing as he could feel the Milk River leaving his body and into his horse.

'' Nice job Matt '', 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 '', Matt says encouragingly, `` Almost there. ''

Matt can see the maneuver starting to come out of his sisters pussy. ally keeps pushing and soon the figurehead legs pop out and finally the back legs. Ally sighs as her foal finally comes out. The two Gemini then light asleep with their babies sucking on their tits.

They wake up the next day and they both feel different. Their bodies had gone back to normal. matte no longer had nipple and widened pelvis and Ally tits and coxa had gone done in size as well. They were perplexed. Then they could take heed the b doors open and in walked Dr. Jekyll into their stall.

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

He looked at their amaze looking and says, `` There was one Thomas More affair that I did not assure you about when I modified your consistency. After you give birthing, the changes that were made revert back and you look just like you did a month ago. Unless you want to keep the variety. ``

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

'' Ok, I bet you have been wondering what your parents are going to consider when you come back after being gone for a calendar month. fountainhead, when I kidnapped you, your parents were going to place you to camp for a calendar month and I have been sending them missive about all the fun you have been having. Do not state anyone about what happened today unless you want me to release a television documenting what happened. From you having sex with each former, with a sawbuck, and giving parturition. Are we clear ? ``

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

Matt had gotten so secondhand to be naked all the meter that the dress feel weird. They then look at each other and Matt knows that life story will never be the Same .