In the bedroom, the two pigs are resting in a puddle of cum. Then, they both lift their heads at the sound of someone crying out in pleasure. Kevin gets up to inspect the sounds, and opens the door to find a transforming woman, with her new hoof hand in her pulsing slit.
"We've got company Mary!" Kevin said, his penis rising at the sight of the new sow. Mary sits up and smiles when she sees who it is.
"Well well well, Valerie." she said, sliding off the bed as seductively as she can. Mary's never cared for her neighbor. Always poking her head in places she doesn't belong. Getting involved in Mary's private matters. And now her nosey ways have finally done her in. Mary's penis slides from its sheath as she too starts to imagine all the dirty things she can do to the woman below her.
Valerie is staring at the two creatures in front of her, mildly shocked. But most of her mind is focused on her own body. Her clothes are starting to tear as her body continues to grow. More and more hair sprouts up, leaving Valerie just as hairy as the pigs before her.
Valerie's tail springs from her and she yelps as it's trapped under her fat ass. Valerie rolls over, and screams when she sees her backside. In addition to the tail, her back and ass are huge. Folds of fat hang from her, and she's covered in hair. Valerie, sickened by what she's turning into, throws up.
Kevin and Mary smirk, sharing the same twisted idea. They drag Valerie into their bedroom, and throw her onto the cum and milk soaked bed. Valerie's body eagerly absorbs as much of the mixture as she can. She screams again as another wave of heat and lust assaults her mind.
Kevin takes his penis and sticks it in Valerie's engorged snatch. It isn't a proper pig pussy yet, but the lips now hang out and are dripping. Mary straddles Valerie, and takes one of her teats. She hangs it over Valerie's new snout, like it's a hook with bait for a fish. And Valerie bites. After snorting in the sex filled air, and smelling Mary's sweet milk, she latches onto the teat and begins to suckle.
Each gulp progresses her transformation further and further. And while Valerie drinks, Kevin starts pounding Valerie. Mary sets her own hard cock between Valerie's growing breasts. Beneath Mary's massive body, Valerie's new breasts have started to grow. Six new nipples poke through the skin, and rub against Mary's asshole.
One manages to find its way into Mary's hole, and she bucks her hips backward. At the same time, Valerie squeals a true pig squeal for the first time. Her nose has turned up, and pushed away from her face. Her ears are stretched to their limit, and hang down on her now bald head. Has Kevin's pounding gets harder, Valerie's new pig ears flop around.
Her fat body shakes, and Valerie lifts a hoof to massage her new pig breasts. She spits out Mary's breast, and switches to Mary's cock head. Now being doubly stimulated by Valerie's mouth and breasts, Mary reaches behind her to find what she knows much have grown in by now.
Valerie's lips have finished their transformation into a sow's vagina. But above that, her new penis has started to grow. It's human sized now, and her testicles have yet to descend. But Mary doesn't care. She takes the virgin cock and slides it into her asshole. Her tail wiggles against it, and Valerie has her first male erection.
Kevin cums first, and Valerie's pussy eats as much of his load as she can. While Kevin pulls out, Mary starts riding Valerie's cock. Her penis jabs the back of Valerie's mouth, and Valerie screams in pleasure.
"Oh god, hurry Mary! Take me! Turn me into a beast!" she shouted.
Mary obliges, and pulls off Valerie's penis, which is still as stiff as ever.
"How about you take me instead?" Mary asked. She turned around to present her own porcine cunt to Valerie. Valerie sits up, and as she does, her new balls press into her lips. They fall into place, testosterone filled Valerie's body. Her cock reaches its full length, and as she approaches Mary, it gains the same spiral Mary's and Kevin's penises have.
Valerie almost screams again as she inserts her cock into Mary. Behind her, Kevin stick his cock back inside Valerie.
The three are now moving back and forth against each other, locking in Valerie's changes. Her breasts wiggle, now FF cups, and her feet change. The nails extend, and surround her toes. They meld together, and her legs crack as they become digitigrade hooves. Her hooves are just like her hoof-hands. The nails are black, and dirty, while her arms and legs are equally fat.
All three pigs cum in unison. Their cum (and Mary and Valerie's milk) drenches the carpet beneath them. Valerie collapses, while Kevin and Mary snort in pleasure. Valerie's body slowly stops shaking from her transformation, and the completed sow oinks softly in her sleep.