Glitter Gold woke up, her room a steamy, sticky mess.
"Gotta clean this and find Twilight," she mumbled.
A quick wave of her horn sparked some magic, tidying the place in minutes. She slipped into fresh clothes, smirking at the mirror.
"Sweet Celestia, even my outfits got a sexy makeover," she said, eyeing her tight new look.
Glitter spun to check her rear, grinning. "Dang, my butt's so juicy now."
She faced the mirror again, her smirk fading.
"But what do I do with this?"
Her tight leggings hugged her massive cock, outlining every inch down to her knee, leaving nothing to hide.
"No way I'm strutting around like this. I'll just teleport to Twilight's and hope she's free," she said.
* * *
With a poof, Glitter zapped into Twilight's treehouse.
"Whoa, why's it so dark?" she muttered.
She bumbled through the room, tripping over books and banging into furniture.
""Twilight?" she whispered. No answer.
Creeping upstairs, Glitter froze at a loud moan, raw and sexy. Her gut said to bolt, but her curiosity pulled her closer.
Twilight's bedroom door was cracked open. Glitter peeked in, eyes wide. There was Twilight, sprawled on her bed, caught in the same humanoid change, pony face atop a curvy human body. Her hand worked between her legs, circling her pussy fast, each move drawing a throaty moan.
Sweat glistened on her skin, her sloppy, wet sounds echoing. Glitter stood glued to the spot, peeking through the door's gap.
"Is that Twilight? She's so… hot," Glitter breathed.
Glitter was mesmerised by what she saw unfolding before her. Then she suddenly started to feel the same sensation again, her pants got tighter and tighter, her shaft was fighting to stay in place, it was on the brink of ripping straight through her leggings again.
Her own cock surged, tightening her leggings to the breaking point, throbbing hard. She shoved it down with both hands.
"Ugh, that stings… but kinda feels good. Shoot, I gotta get outta here!" she hissed.
In an attempt to leave as quickly as possible, she knocked over a plant in the hallway but quickly caught it before it hit the floor.
"Phew," she said.
When she looked back through the door, Twilight was gone.
"Can I help you with something, Glitter?" Twilight's voice came from behind her.
Glitter jolted at the surprise.
Twilight stood there, now fully clothed. She wore short shorts that could barely hold in her butt cheeks, and a crop top clearly too small for her huge breasts.
Glitter audibly gulped when she saw Twilight.
"Twi! Just the pony I was looking for, hehe. I could really use your help," said Glitter.
"Mhm, follow me to my study," Twilight said, floating down the stairs using her magic, Glitter following behind.
Twilight floated up to one of the higher bookshelves and brought down a huge book.
"So, as you can see, we've clearly undergone some form of metamorphosis. What form we've taken? I can't be too sure, I've never seen creatures like this before. But I've deduced this happened last night when everypony was celebrating the Grand Galloping Gala. It's the only time everybody could've been affected at once. Since you, me, and the others stayed in Ponyville to party, unless only us locals got hit, the only common factor was last night's storm."
As Twilight paced back and forth, brainstorming, Glitter was preoccupied with other matters.
She watched as Twilight's breasts bounced up and down with every step, carefully admiring how her shorts barely covered her butt.
"I want to hold her, I don't know why, but I just do. I need to feel her warmth sink into my fingers," she thought to herself.
"Hey, are you even liste—" Twilight froze, finally noticing what Glitter was packing in her leggings, on the brink of jumping out to say hello.
"Don't look, it's crazy! I don't know why I have it, that's why I came here. I really need your help, Twilight," Glitter explained.
"It's so big, why didn't you tell me you had one?" Twilight said, her eyes wide, floating closer with a spark of her horn.
"Uh, Twi? You okay? Hello?" Glitter stammered."Just… let me hold it for a minute, okay? I won't do anything weird, I promise, I just wanna hold it," Twilight said, her gaze fixed on Glitter's crotch, a flirty grin spreading.
"Twi, we really shouldn't," Glitter said.
"Oh, but we really should," Twilight purred.
Using her magic, she ripped a small hole in Glitter's leggings, crawled right up to Glitter on all fours, wrapped her arms around her, and took a huge sniff of her cock.
This seemed to put Twilight in a wild daze, her eyes half-closed.
"C'mon, Glitter, take it out just for a sec, pleeease," she begged.
"Twilight, we can't, you're not thinking straight. You're one of my best friends," Glitter said.
Twilight stopped sniffing and stood up, turning away.
"Fine, but when you go, I'll be here all alone, playing with myself," she said seductively, pulling her shorts up higher into her butt cheeks so they were barely visible.
That small move flipped a switch in Glitter. Her cock tore straight through her leggings, springing free into the cool air.
Twilight's eyes popped wide, her jaw dropping.
"Now look what you've done," Glitter said.