The next morning, it took Rumble nearly thirty seconds to notice that Pipsqueak was standing in his doorway, watching him.

He started, and hugged the blankets to his scrawny chest. They seemed so...heavy now. So much bigger.

Pip grinned down at him—and he meant down. At around seven feet, he had to duck to even fit in the doorway; at his peak height, even Rumble had just felt the tips of his ears brushing against the doorframe. “Morning, little guy,” Pip said.

Rumble made to scramble out of bed—and then froze, his cheeks flushing when he realized that his feet weren’t even touching the floor. That was when he noticed Pip's fat, lengthy cock. It was angled almost casually against the inside of his thigh, easily fourteen inches long, soft. The rise and fall of Pip’s broad, muscular chest seemed to fill the rest of the doorway. Rumble’s nostrils flared, scenting the heavy musk that Pip’s fat, heavy nuts were putting out. He watched as Pip’s cock slowly chubbed up, lazily moving to a half-mast of around nineteen inches.

At this height, the top of Rumble’s head just barely reached over Pip’s ripped abs. The much larger stallion chuckled and took a step forward. Rumble bit his lip, watching that massive cock bob and sway in front of him. He closed his eyes as it seemed to lurch toward him. It brushed against his cheek and Rumble shivered, feeling a strange coolness flood his body as it smeared a long, sticky trail across his face.

Pip moaned slightly as his cock brushed up against Rumble’s cheek, its steady trail of pre slowly oozing down the smaller stallion’s face. The contact only made Rumble shrink even smaller, losing a whole inch as Pip swelled up even larger. Rumble moaned, too, his hips widening, his rump growing rounder and softer as his mane grew out even longer. Now down to his chest, his long, glossy hair framed a heart-shaped face and an hourglass figure that most mares would kill for.

Now barely four-foot-ten, Rumble found that the enormous Pip absolutely dominated his vision. Rumble gulped, eyeing that massive, bobbing erection with trepidation.

Pip’s next words were surprisingly quiet. “You want it,” he murmured, “don’t you?”

Rumble started to shake his head “no”—and then found himself nodding instead. Oh, gods. He wasn’t gay, was he?

But all the same, he felt a rush of blood to his groin. Pip chuckled. “Looks like you’re excited too,” he said, grinning down at Rumble’s tiny little erection. Rumble flushed as he eyed his tiny little half-inch pecker, his balls like tiny frozen peas compared to Pip’s heavy, virile pair of cantaloupes.

“M-maybe a little,” Rumble admitted, his voice shaking. He wasn’t gay—but, gods, he needed that cock. Needed to feel it, to hold it to suck it, to have it fill him—

“Well, then.” Pip’s grin broadened, and he stepped around Pip’s tiny body and sat on his bed. The mattress sagged under his heavy weight. Even sitting down, he managed to look down on the little, effeminate Rumble. “Why don’t you come over and have a look?”

Pip patted the mattress with a big hand. Hesitantly, Rumble made his way back over. At his new height, he barely had to bend over to reach the tip of Pip’s magnificent, bobbing shaft.

He placed his hands on Pip’s big, muscled thighs and squeezed them. His fingers couldn’t reach even half of the way around those big slabs of muscle. His eyes darting up to meet Pip’s, Rumble slowly leaned forward and began to suck on Pip’s flare.

“Mm,” Pip grunted. He reached around Rumble’s side and placed a hand on his shoulder that easily covered half of his back. He pulled the little effeminate stallion a little closer. “That’s more like it.”

Hoping to please, and admittedly hungry for Pip’s cock, Rumble tried to open his muzzle a little wider to fit Pip’s flared, leaking head in. He was able to get his muzzle over the big stallion’s cockslit, and felt pre steadily flowing down his throat, but try as he might, he couldn’t wrap his lips around it. At nearly five inches in width, it was just way too big.

Pip didn’t seem to notice, though. Their physical contact was activating the amulet again. He groaned as he once again felt his bones shift, that magical warmth filling his body. Rumble felt Pip’s growing hands pressing his muzzle even further against his shaft, the amount of leaking pre doubling in volume. His jaw audibly creaked, his lips forced incredibly wide as Pip tried to push his massive, swelling cock inside.

Because it was growing—again. Pip closed his eyes and groaned as he grew another one or two inches. Meanwhile, Rumble felt the oddest change come over him. He let his lips part and moaned, the sensation of warmth rising in his loins.

His tiny little prick shrunk until it was barely even a nub—and then grew inward, the space between his legs folding out into a pair of thick pussy lips. He felt the cavern beyond grow, felt an all-encompassing need to be filled rise up in him, and whimpered softly.

His hips pushed out, his butt rounding out nicely as his waist thinned to a perfect hourglass shape. His chest grew out in front of him, and he let out a grunt as two soft, round breasts flopped gently down in place.

His lips filled out, his hair growing down until it nearly reached his waist. His—no, her eyes grew larger, eyelashes growing out, her whole body shrinking down and getting leaner, curvier, and—at least up front—more well-endowed.

By the time the whole thing was done, the new Rumble was left blinking, shivering slightly as the aftereffects of the change ran through her. She glanced down at herself and let out a small “eep!” of surprise as she noticed her prominent B-cup nestling gently against her chest.

“N-no way,” Rumble said. She was shaking. She gasped suddenly as she felt something spasm between her legs, then cried out as a wave of pleasure washed over her loins. She almost collapsed onto the floor, but was caught by Pip’s big, strong hands.

Pip’s erection was throbbing harder than ever. In a flash of motion, he grabbed the new Rumble from the floor and hefted her over his cock with as much ease as though he were lifting a teddy bear.

“P-Pip!” Rumble gritted her teeth. “What’re you—“

But Pip was already groping her breasts, which were even more prominent compared to her tiny, slender form. Overcome with sudden lust, he lowered her down onto his shaft.

Rumble’s eyes shot open wide. Funnily enough, the one thought going through her head was: But I thought Pipsqueak was gay.

And then Pip’s cock was filling her like nothing she’d ever felt before. She let out a strangled cry of pleasure and pain as Pip stretched her incredibly, impossibly wide, her pussy like a vise around Pip’s two-foot shaft.

She watched in disbelief as his member actually began to bulge against the inside of her stomach. Then she cried out again, her new insides spasming in orgasm as he suddenly slammed his length fully inside of her. A spurt of precum burst in her belly, and she inhaled sharply as she felt it filling up her new marehood, then gasped when she felt him bottom out inside of her.

Her hoof trembled over the new bulge in her stomach. Pip was gritting his teeth, his huge hands resting on Rumble’s hips and pressing her soft ass against his muscular thighs. With a grunt, he hugged Rumble close to his stomach, the thick slabs of meat that made up his pecs casting a dark shadow over the tiny mare’s body. She threw her head back against his iron-hard six pack, and kicked her legs feebly as the pleasure overcame her. Her tiny feet just barely poked out over Pip’s long, thick, thighs and quads.

She let out another cry as Pip lifted her up, the bulge in her stomach vanishing, and then slammed her back down. “F-fuck!” Pip trembled in ecstasy and squeezed his eyes shut. His twenty-five-inch arms flexed to their full size, each one as wide around as Rumble’s entire waist. “Y-you’re so tight!”

Oh, gods, she felt full. Rumble was helpless to do anything more than pant and moan in pleasure as Pip thrust into her against and again, her tiny body little more than a cocksleeve to his incredible, masculine virility and size. Again and again he pounded her, squeezing his fingers around her hips and ass and kneading her soft, slender body as more and more of his pre spurted inside of her. Rumble felt a wave of pleasure building inside of her, and let out another cry of pure pleasure as her second orgasm took her.

That was all it took to set Pip off, too. With a sudden gasp, he hilted his throbbing cock all the way inside of Rumble and pressed her to him. She was powerless to move, his massive erection spearing her and trapping her against his rock-hard abs. She felt the bottom of his cock bulge, then his flare swelling inside of her.

A massive blast of cum erupted from Pip’s tip, its volume alone more than most stallions could produce in an entire orgasm. Rumble and Pip cried out together as spurt after spurt of hot, white spooge blasted from Pip’s churning, swollen balls. Ropes and ropes of Pip’s thick, virile jizz painted Rumble’s insides white, first running down the sides of her cunt and then building up behind the tight, hot seal her marehood made around his cock.

Rumble pressed onto the bulge in her belly, groaning incoherently as she felt it begin to bloat with Pip’s seed. More and more of his spooge flooded her insides; she could feel it sloshing inside of her, its warmth and pressure mounting as he pressed his cock even further inside of her. Cup after cup, blast after blast of hot white cream burst inside of her until she felt like there had to be at least a gallon of his seed inside of her.

When his orgasm finally finished, Pip groaned and leaned back onto the bed. His big feet still touched the ground, but the top of his head reached all the way to the other side of the mattress. “F-fuck,” he gasped.

“Fuck,” Rumble groaned in response. She flopped her head back onto Rumble’s thick, beefy pecs.

Pip’s eyes fluttered closed as he basked in his afterglow. He curled an arm around Rumble’s curvy figure that was nearly as large as she was. She squirmed beneath the weight, then froze as she felt a metallic warmth against the back of her head.

Her hand went up to her own throat, where the necklace Pip had given her still lingered. It was cold against her fingers, and as she brushed against it, she swore she could feel Pip growing beneath her, his muscles swelling as her own hips widened, her figure shrinking steadily…

A small smirk crossed her face. Ah-ha.

Pip came to a few hours later. He’d gotten very little sleep the last night, instead choosing to experiment with his new body, so he was more than happy for the chance to nap. He was pretty sure that the giant white stains on the walls, floor, and ceiling weren’t going to come out anytime soon, but at least he’d had fun making them.

With a satisfied, happy grunt, he sat up in bed—and stared. With a gasp, he realized that his feet were dangling off the side of the mattress. The ceiling seemed so much further away than it should be! Panicking, he felt his torso and stifled a sob when he felt a lean, shapeless chest. He let out a muffled cry as he glanced down, spotting a familiar three-inch pecker staring sadly back up at him.

“No way,” he breathed. “Was it all a dream?”

“Morning, big guy.”

Pipsqueak’s head snapped to the side. There, filling the entire doorway and then some, was a truly massive mare. Standing nearly seven feet tall and ducking to fit her head in the doorframe, each one of her arms had to be a good twenty-three inches around. Her wide hips and impossibly huge breasts rubbed against the sides of the doorframe, and, as she turned to press herself against the side, her massive, globular ass jiggled a bit.

That deep, rich voice—that dark coat—that mane color. Pip swallowed and glanced down at the weight on his chest.

The sharp glint of the “stealing” amulet sneered back at him. He looked back up and caught the shine of the “absorbing” amulet glittering between the enormous Rumble’s massive cleavage.

“Glad to see you’re finally awake,” Rumble said, grinning predatorily. She placed her hands on the sides of her breasts and squeezed them together. After a moment, they drifted down to her rounded stomach, where the remnants of her liquid filling still sloshed gently. “Means we can finally have some real fun.”

Pip nearly fainted right then and there. The last thing that went through his head before he blacked out was:

I guess I’m bi after all.