"You came to the right place," Artifact says to the two princesses walking next to her. The mare is a red pegasus with dark blue zebra stripes lining her legs. Her red hair is spiked back words with light blue streaks running threw it like lightning. Her eyes are light orange with her cutie mark being an old-looking pot.
"I knew you could help our search," Zipp says with a smile as the group walk down the hallway of the Zephyr Heights museum.
"Normally I don't let ponies back here because it houses potentially some of the most dangerous artifacts and books we have," Artifact responds.
"Don't worry, we'll be careful," Pipp responds with a smile.
"I know you will," Artifact says as she stops at a door labeled janitor closet. Zipp and Pipp look at each other with slight confusion before Artifact rolls her eyes and pushes the door open. The door opens up into a giant room. Bookshelves full of old books line the walls while glass displays show off ancient artifacts.
"Wow," Zipp and Pipp whisper as they look around the room they are entering into.
"It's one of the biggest galleries we sadly can't have open to the public," Artifact says as Zipp and Pipp look around. "While most of the artifacts have not shown any life, even after magic has returned, You two should still be careful what you touch,"
"We will," Pipp says before taking flight towards the bookshelves.
"One thing before you go," Zipp says, turning around to face Artifact.
"Ya?"
"Who's that?" Zipp asks, pointing to the poster hanging up on the ceiling. The poster shows a red unicorn stallion with a bent horn and a big smile. His red hair is spiked back like he just stepped out of an explosion. Dark blue streaks run threw his main and red tail. Covering his body are dark blue zebra strips.
"That would be Acid Flask," Artifact responds. "He was a scientist back in the day of friendship. Most of the artifacts in this room were his," Artifact explains. "And before you ask," Artifact says with a sly smile as Zipp closes her mouth. "Yes, he is my relative from long ago,"
"Thanks," Zipp nods to her before spreading her wings and taking flight toward the books. Artifact smiles before turning around and heading out the door before closing it behind her. Zipp lands next to the bookshelves before quickly scanning them with her eyes.
"What are we looking for?" Pipp asks as she walks between the display cases.
"Anything that could help us find Discord," Zipp responds back, not taking her eyes off the books. It a few minutes of quiet as the two look around the room before Pipp lets out a loud gasp. "What is it!" Zipp yells, quickly turning around before running over to Pipp sitting at a display case.
"Look!" Pipp says, her eyes sparkling with a wide smile on her face. "It's our filly hood game," Pipp says, causing Zipp to roll her eyes. Pipp holds out an old wooden box with a metal handle and a flask engraved on the top of the box.
"Maybe gasp a bit quieter when you find something you like next time," Zipp responds, more than a bit grumpy.
"How do you know it can't help us?" Pipp asks, opening up the box. Lining the inside is a dark purple fabric with a horizontal wooden pole holding up numbers from one to nine. Sitting in the center of the box is a set of wooden dice.
"How could a silly filly game help us?" Zipp asks, turning away.
"What if it has some kind of charm on it that could help us find Discord?" Pipp asks, picking up the dice. "I'll win and see if it does anything," Pipp says, rolling the dice as Zipp slowly shakes her head. She makes her way back to the bookshelves as the clanking of wooden dice ring out in the room every few seconds along with a flip of a number.
Pipp sighs before flipping the numbers back up and rolling the dice over and over again as Zipp continues searching the books. Pipp sits there and rolls over and over again for the next five minutes until finally, she lets out a happy gasp. Zipp rolls her eyes as she grabs another book and starts flipping threw it.
"Finally," Pipp whispers as she flips down the last number, and shuts the box. Pipp sits and waits for something to happen, but after a few seconds, she pouts in disappointment. "Guss Zipp was right after all," Pipp mopes as she places the box back into the case and walks away.
The flask engraved into the lid glows a light orange as Pipp walks away. Zipp's body glows the same light orange as a shiver runs down her back. She shakes a bit before looking around the room. She notices Pipp walking around the room a bit sad. She sighs and shakes her head slowly before turning back to the book in her hoof.
"I told her," Zipp says before a weird feeling shoots up her body from her crotch. Zipp drops the book onto the ground as she staggers a bit. Her head feels like it's spinning and light as she grips her stomick. "What the?" Zipp whispers as the world around her stops spinning. "What was," Zipp's eyes widen as her hoof quickly covers her mouth. Her voice had dropped multiple octaves and was now as low as a normal stallion's voice. Zipp removes her hoof before quickly feeling up her face. Her muzzle had changed from her soft curve to a hard, more square shape jaw. Zipp looks between her legs to see a limp dick in place of her vagina.
"What happened?" Zipp thinks as she straitens up.
Pipp on the opposite side of the room had not noticed the change just yet. She was browsing the other artifacts when her body was enveloped by the same light orange glow as a tingle ran up her body. Pipp shivered a bit before looking around. She looks over to see Zipp mentally freaking out over her new body.
"Zipp?" Pipp whispers in worry. She goes to walk forward but stops as her body tingles again in the most pleasurable way she could have imagined. Pipp lets slip a light moan as her body creaks and groans in protest. Her bones stretch as she grows taller. Her skin covering her slowly growing body as her rump starts to plump bigger. Pipp's face turns bright red as her eyes roll into the top of her head. Her slit drips out pre cum as she grows.
Her body stops growing as Pipp catches her breath. She now stands almost a head taller than Zipp. Pipp recovers before looking at her body. "What in the world?" Pipp whispers to herself as Zipp notices.
"So it happened to you too?" Zipp asks, walking over to her sister. Her voice still surprising herself.
"What happened?" Pipp asks, looking down at Zipp.
"I was going to ask you that," Zipp responds back, pointing a hoof at Pipp. The two look over to see a light orange glow coming from one of the cases. "And I think we got our answer," Zipp says before turning and heading toward the glowing light. Pipp follows behind her as she makes her way to the case. The two stop and look to see the flask engraved in the box glowing orange. "So your stupid game caused this,"
"So how do we undo this?" Pipp asks, pointing at Zipp's new physique.
"Maybe we play it again?" Zipp asks, shrugging her shoulders as a small orange ball of light pops out of the top of the box. The two look at it as it splits into two before the two balls head straight for the pair. Zipp flinches as the ball of magic hits her. Pipp tries to back away from the one coming towards her but ends up landing on her butt as the orange magic hits her. Pipp blinks as Zipp stands there in confusion.
"Ok," Pipp says, very confused as she stands back up. "What was that abo..." Pipp is stopped mid-sentence as she notices Zipp's new dick turning rock hard. Her sister's face is a deep red while she breathes heavily. Her eyes almost rolled up into her head as the dick exenteds out to almost her entire body length.
A new wave of warmth falls over Pipp's body as she can't turn away from staring at the throbbing appendage. Her slit starts dripping out pre cum as thoughts rush threw her head of the massive dick sliding into her. She shakes her head as she fights off the thoughts of her sister fucking her. Zipp isn't faring any better against the new surge of lust in her body. Zipp keeps looking up at her sister as she tries to look away. Her mind telling her to fuck her sister's new, plush butt until it can't feel anymore. Zipp shuts her eyes as she grits her teeth.
"Zipp, something's happening to me," Pipp says with worry in her voice. "My mind, it's flooded with lust,"
"Fight it Pipp," Zipp replies threw gritted teeth. "Can't... think..." Zipp grunts as images of her sister flood her head. Pipp lays down and buries her face into her hooves in an attempt to clear her head.
"Nothing's working," Pipp says, causing Zipp to look over at her sister on the ground. Zipp's dick throbs as her eyes trail along Pipp's very curvy figure down to her plush rump.
"F-fuck," Zipp grunts in anger as she shuts her eyes hard. "I.. can't.. stop it," Zipp says as her body starts to override her own will and starts walking over to Pipp on the ground. "I'm sorry," Zipp says, still with her eyes closed her body steps over top of Pipp's body with her dick throbbing against Pipp's rump.
"Sorry for what?" Pipp asks, looking back, but it was too late. Pipp lets out a loud moan as Zipp's dick slides into her very tight cunt. Zipp's heart racing as she makes it hip-deep into her own sister. "Holy hay feathers," Pipp responds as the massive dick throbs inside of her body. "Sweet Haven I don't care anymore, just fuck me already sis!" Pipp pleaded out.
"Not like I really have a choice," Zipp thinks to herself as her new body does its thing. She leans her hooves against Pipp's back, right in between her two fluffy wings that are now spread stiff, before slowly sliding her dick out of Pipp. Zipp pulls almost completely out before thrusting hard into her sister's rump, causing it to jiggle slightly. Pipp lets out a happy moan as Zipp's hard dick thrust deep inside of her.
Cum spills out of Pipp as Zipp pulls back out again. She thrust back into her sister with a grunt as her sister's vagina clamps down on her throbbing dick, causing Zipp's body to shiver in pleasure. "Fuck," Zipp moans as her hips push against her sister's plush rump. Zipp pulls out again as lust clouds her mind.
Zipp leans forward a bit and starts rapidly thrusting into Pipp. Pipp lets out a loud surprise moan at the sudden speed up. Zipp grits her teeth in effort as her hips hit against her sister's large rump. Pipp buries her face into her arms as her eyes roll up into her head. Cum sliding out and down her leg as Zipp continuously pounds her plot.
"I'm close," Zipp says as she feels a warm, fuzzy feeling in her nether region. Pipp responds by helping out and pushing her rump back as Zipp pushes forward. The two work in unison as the pleaser rises in Zipp's nethers. Pipp's body shakes as waves of cum fill her vagina, letting Zip's dick slide easier in and out. "Fuck!" Zipp yells out as she slams her hips deep into Pipp while throwing her head back.
She lets loose her cum into her little sis's pussy. Pipp's body shakes as she moans happily, finally feeling relief from the heat. Zipp slowly thrust a few more times as she lets the cum slide out and dribble to a stop. Their hearts race as Zipp pulls out of her sister.
Zipp collapses to the ground next to Pipp as the box glows orange again. The two glow the same orange before they return back to normal. Zipp looks over at Pipp, who looks back over at her. "Tell, no one," Zipp says, squinting her eyes at Pipp with seriousness emanating from her voice. Pipp quickly nods in response.
