Vertigo Industries were known for their genetic testing, and were often criticized for it. They began testing to see if animal intelligence can be increased with training or gene-therapy. These experiments resulted in Swinel, a pig with the intelligence of a human being. For some unexplained reason its genetic code seemed contagious to other pigs, as each sow that mated with him gained his genes. After the other pigs gained his genetic code they seemed to be under his complete control. The scientists underestimated Swinel's intelligence and he escaped into the town near Vertigo Industries…
Diane and her husband, Harold, had the day off from work and decided to relax until their daughter, Darla got home from high school. She went upstairs to bed to take a nap after watering her flowers in the backyard but forgot to close the backdoor, letting their dog out. Harold had fallen asleep in his recliner in the living room watching TV. Swinel had strayed into the nearest neighborhood and was trotting through people's backyards when he noticed the open backdoor to their house. He crept inside and immediately smelled the scent of females. He slowly trotted up the stairs, following the scent into Diane's bedroom. There she lay in her sleeping gown resting peacefully on the bed. Swinel used the dog's bed step to get on the mattress. He slowly crawled between her legs to see her vagina under her gown. The scent reeled him to her snatch and he buried his snout into it.
Diane immediately woke from the intrusion and was just as soon enthralled with pleasure.
"Oh! Harold!" she moaned, as her pussy was being eaten out like never before.
She rolled her eyes up in pleasure as Swinel dug his snout deeper into her vagina. Her feet and legs began to thicken as fat built up in her body. Diane's hips grew wider, as her stomach grew fatter and fatter. Swinel adjusted himself to her growing size and continued "eating." Diane's breast grew from a size B to DD and filled with milk as her arms and hands rippled with fat. She moaned heavily as her toes and fingers melded together into two big digits with a black nails, her thumbs fattened a little and their nails turned black like her fingers. Diane began rubbing her hands up and down her huge stomach as C-cup size breasts grew down her torso until she had three new pairs of tits to compliment her huge old ones. She moved a hand down to Swinel's head and looked down to see a large pig digging its head under her gown into her wet pussy. Diane was about to object when another wave of pleasure flushed through her as her vagina doubled in size pushing her into orgasm. Entralled in pleasure, she pushed Swinel's snout deeper into her snatch. Her neck thickened until she had a huge double chin. She began snorting as her nose upturned and her nostrils grew larger. Her nose pushed out into a snout and small tusks poked from her bottom lip. Diane's light brown hair parted as two big floppy ears stuck out. She closed her eyes as her brow thickened and jutted out with the hair falling from it. Her orgasm ended with her changes as a curly tail pushed from her spine, bringing new instincts to her mind.
Swinel exited her pussy and started oinking to her. Diane understood and it all seemed clear to her. She had to start a family of pigs until the whole town understood the cause. Immediately she could smell the erection Harold had downstairs. She crept down the stairs as they creaked under her new 230 pound weight. Swinel followed her into the living room. Harold was having a wet dream and it was making Diane's pussy wet. She snorted and got on her knees. She slid Harold's hard penis out of his boxers and began sucking his 7 inch in a half shaft. Harold murmured as he slowly awoke. The pleasure in his dream became reality as he moaned in pleasure as his wife sucked his throbbing cock.
He rolled his eyes back in pleasure as Diane sucked harder. His body expanded with fat and he began drooling. His feet and hands transformed like Diane's and he laid a fatty hand on her head. He squealed as his boxers tightened on him until they burst into shreds allowing his curly tail through. His wifebeater stretched out. Harold gained a double chin and a snout pushed out from his face, while his brow grew thicker like a caveman's with the hair falling from it. He snorted and oinked away as large tusks stuck out from his bottom lip and big floppy ears replaced his human ones. His penis thickened and grew until it was twice as thick as before and 3 inches longer. He squealed again as he shot his load into Diane's snout. She drank it greedily til there was no more and arose to look at her mate. Harold was overcome with new desires and instincts and made a big snort in agreement with them.
The large boar stood up in front of his porcine wife. He rubbed his snout against hers and she oinked with delight. Then something clicked in their heads. Food. The two ran into the kitchen and Diane ran to the fridge while Harold dug his head into the trash can. Diane took a gallon of milk and gulped it all down. Harold snorted his head off as he gorged on old food in the garbage. Swinel suddenly started oinking instructions to his children and they stopped eating and looked up at him with their mouths half full.
They were to create a trough for the family to feed from until they could expand the sty. Immediately Harold emptied out the water from the Jacuzzi on their back porch as Diane began filling it with food from the cabinets. Beans, corn, greens, bread, cereal, and all she could find edible went into the new trough. Harold picked out food from the trash can and put it all in the Jacuzzi. Diane grabbed her upper breasts and started milking them into the trough. Harold came behind her and started milking her other tits filling the tub of food. Swinel oinked to Harold and he ran and got a shovel. Immediately he started mixing the food into slop. Diane realized that her daughter would get out of school in the next thirty minutes and took the empty milk jug and started milking her tit into it. It filled with milk and she put it back into the fridge.
She trotted into the bathroom and wedged her ass onto the toilet stool. Diane snorted as she dumped her bowels into the empty toilet. When she finished she went to the mirror and wiped some mucus from her snout and promptly exited the bathroom. She went back into to the kitchen and Swinel oinked an order to her. She then clenched her fists and shut her eyes tight. Slowly she began changing back into human form Her size dwindle back to normal and the only thing that remained of her porcine self was her curly tail. When she opened her eyes she heard a knock at the front door.
"Come in!" she yelled, and with that an unexpected guest arrived.
David walked in the house realizing he was welcomed and walked through the living room into the kitchen. "David, nice to see you. Forgive me for the way I'm dressed. But what are you doing here? Is Darla outside?" asked Diane.
"Hi Mrs. Tinley. No, Darla isn't with me she is at a French Club meeting. I came here to surprise her. Sorry I didn't tell you in advance," answered David
"Oh, no problem but in return I want you to try out this all natural milk I bought."
"Um. Okay. Is it good?"
"You tell me," answered Diane pulling the jug of milk from the fridge.
She grabbed a glass and poured it half full with the milk. David took the glass, thanked her and started drinking. It tasted wonderful, the milk had a sweetness to it that made it perfect. David gulped the rest and gave Diane the thumbs up.
"Want some more?" she asked
David replied with an eager "yes" and Diane poured the glass full with more milk. He drank it down and asked for more. He gulped down the second glass full and let out a loud burp.
"Excuse me," he said, surprised by the loud gesture.
"Don't be it's natural," she said comfortly, "want more?"
"Yes please," he answered.
Diane pushed the whole jug to him and he picked it up and started drinking it down. As he drank his stomach expanded with fat. His light chest hair grew denser as milk streamed down his mouth. His shirt stretched to near breaking point. Diane changed back into her sow form and pulled a fatty tit out the top of her gown and offered it to David as he finished the jug. He stepped to her and put his mouth to her nipple and started sucking like a piglet. His arms and legs thickened and his hands and feet followed suit while he sucked. David squealed as the button on his jeans bust and they relaxed with the ease of pressure. His fingers and toes melded into two thick fatty digits with the same black crusty nail as Diane's, bursting his shoes along with his socks. Two big pig ears stuck through his hair and his nose upturned as he grew a double chin. His nosed pushed out into a snout. Diane squealed in pleasure and joy from the newly changing swine drinking from her tit, and began rubbing her hand through his brown hair. Swinel trotted in and oinked in approval. David's brow thickened as the hair on them fell off while two large tusks grew from his bottom lip. His balls bulged and got heavier as his cock grew from 8 inches to 11, hard, horny, and dripping precum. His mind slipped as a thick curly tail grew from the tip of his spine. All that mattered now was his new family and making it grow into a full sty.With these new instincts David stopped sucking and squealed in unison with Diane.
Swinel ordered them to wait in the backyard for Darla to arrive. Swinel followed them outside and listened for Darla's car. Harold was rooting around in the grass and started chewing on a potato from Diane's garden. Swinel ordered him to take the rest and add them to the slop. Harold obeyed as they heard Darla's car pull up. Darla opened the front door and waltzed in. She saw David's car and figured he was trying to surprise her. Darla called for him and her parents but received no answer. She sat on the steps and pretended to start crying.
"Where is everybody I'm all alone," she faked.
David snuck in the back door and stared at her hidden face. He sniffed the air and could smell her teenaged vagina. David dashed as fast as his weight could take him toward Darla and he dived his head into her crotch under her skirt. Darla's skirt was already a little short so David had no problem reaching her pussy. He used his tusks to tear away her thong and began to lick and nuzzle her vagina. Darla's head immediately shot up and she laid on the stairs in complete pleasure. Her pussy doubled in size as her hips expanded. She moaned as her thighs and legs rippled with fat. Her toes began melding together to form pig-like digits as they burst through her shoes and socks. Darla's tank top stretched as her belly expanded and poked out, making her drool. Her perky C-cup breasts grew to a DD and she started squeezing them as they filled with milk. Her hands turned into porcine digits like her feet as she squeezed. Three more pairs formed under her previous two and swelled with milk as well. Darla grunted as her chin and throat doubled with fat, she felt hornier than ever while she looked down at the boar licking her clit. David dug his snout in further to increase her pleasure. Her nose upturned as her snout pushed out. Two small tusks peaked from under her bottom lip and her brow thickened and lost its hair as mucus dripped down her snout. Floppy ears poked out from her dark hair. Her thoughts shifted as she climaxed. She squealed as her brain was overcome with porcine instincts. A curly tail popped through her skirt finishing the transformation. David lifted his snout to hers and licked the mucus away. She licked his snout in a thank you and trotted into the backyard with him.
Swinel squealed and his offspring followed suit as they all dug their snouts into the trough and devoured the slop. Their tails sticking in the air as their minds were overcome with the hunger to eat. A hunger that would not be soon satisfied.
Swinel looked up. His new sty of pigs would grow as they turned more to their swinish cause…