One Month Later-

Cadance had already drawn up plans before talking to Shining, so it was just a matter of implementing them. Most of it went off without a hitch, but Cadance had been oddly insistent that things be moved along. Shining later learned that it was because the time spell had to be cast at a specific date and time, and they’d have to wait a year to try again if they missed the window.

The two of them now stood in their bedroom making a few last-minute preparations. On the floor was an incredibly complex magical array filled with arcane symbols, and hovering in the center was a beautiful blue crystal cut in the shape of a heart.

“How long until Future-You gets here again?” Shining asked for the eighth time. He was still a stallion (though not for much longer) standing before a mirror with a forlorn expression.

Cadance didn’t look up from the parchment she was poring over. “Ten on the dot.”

Shining checked the clock. “Uh… then we kinda only have five minutes. Shouldn’t we, y’know... get ready ourselves?”

“In a minute, in a minute...” Cadance scratched something out and wrote in something else in its place. “Ugh, Twilight, I love you, but you really need to work on your hornwriting…”

Shining watched his longer mane and tail swish back and forth. He’d never let them grow out this far before. “Is she—er, future-you, I mean, coming as a stallion or a mare?”

Cadance’s eyes flitted up and down Twilight’s writings. “Probably a stallion. The spell only gives us fifteen minutes to get the job done, so we can’t really waste time with preamble or prep… oh! That’s supposed to be the derivative of the value! Didn’t see the prime symbol… okay, that all makes sense. I think we’re good to go!”

Shining chewed on his lip. “You’re sure you don’t want me to cast the time spell?”

“We’re not going over this again,” Cadance said. “Now come stand in front of me.”

Shining couldn’t help glancing at the mirror one last time before going over to her. “I-I just don’t want anything to go wrong. I trust you, but this is pretty advanced magic...”

“Good thing I’m a pretty advanced magic user.” Cadance moved Shining over a little bit before lighting her horn. “But hold that thought. Let’s get the easy part out of the way.”

A cool wave of magic washed over Shining. He tensed at first, but then relaxed and allowed it to envelop him. It teased and brushed along his coat, sweeping through him with a pleasant tingling as it took in the contours and functioning of his body. The same thing happened to Cadance at the same time.

The changes started internally. Shining first felt a slight twinge in the back of his head, followed by a sudden shiver that spread throughout the rest of him. His entire frame rippled and morphed in its wake—his barrel lengthened and became more compact, his coat softened, his legs shortened, his hips widened, his neck thinned. The world seemed to grow larger around him as he shrank several inches and shed a significant amount of muscle mass. He felt an abrupt shortness of breath as his internal organs shifted slightly, and his muzzle itched as it shrank and rounded out. There was also a sudden, maddening tingling in his throat, but he kept silent for Cadance’s sake.

And then the most relevant change occurred. He was well-acquainted with what it felt like, so he didn’t react much when his balls and sheath went numb. However, he—or she, rather, did gasp a second later when her new marehood formed, as she’d accidentally brushed it with her tail. She ceased the motion before it happened again.

“All done, my little Gleaming,” said a male voice.

Gleaming Shield opened her eyes. Looming over her was a handsome pink stallion, tall and sure, looking down at her with twinkling eyes and a playful smirk.

Gleaming cleared her throat and chuckled, her ears twitching at her new silvery soprano. “You say that every time, Eros.”

Eros was masculine, but not overly so. His muscles were firm, his wings were angular and sleek, his jaw was rugged, his flanks were slim, and his hooves were unshorn. His mane and tail still had Cadance’s telltale curls, but they were cut short to give him a more dashing look. There was a mysterious air about him, one both bizarrely alluring and enticing, and while it was certainly unique, it was also very reminiscent of his female form.

And sweet mercy, was he ever big. Gleaming swore he was at least as tall as Celestia, and with her shrunken down quite a bit...

Eros looked his transformed mate up and down. “That’s because it’s true. You won’t be little for very long, though. Not if I have anything to say about it, at least…”

“Whoa there, lover-boy.” Gleaming tilted her head towards the circle. “We still have work to do.”

“Work that’s all done for the moment.” Eros stepped to the side to take in Gleaming's new form. She was lithe and curvaceous, sporting a soft downy coat and a bright blue mane that spilled down her slender neck and shoulders. She was a touch taller than most mares, but he still looked teeny-tiny to him. Her military training was still evident in her athletic build, most notably in her shapely legs and deliciously toned flanks, and she had the same calm, analytic demeanor that gave away who she really was.

Gleaming cocked her head. “What do you mean?”

Eros chuckled. “The only thing I needed to do for the time spell was lock in the point I want to come back to.” He bent down to nuzzle her withers. “Mmmm, everything else is done on the time-traveler’s end.”

Gleaming shivered from Eros’ hot breath in her mane. His touch was fond and familiar, his feathery lips peppering her neck with kisses. “Sh-Shouldn’t we wait, though? We don’t wanna ramp things up too quickly…”

Eros hummed from her clean and fruity scent. Using each other’s shampoo was definitely a good idea. “Hehe, things are going to ramp up quickly regardless. The book said it takes a few seconds to kick in, but you should be feeling it riiiiiiiiighhht abouuuuuuuut....”

It hit her like a freight train. Gleaming’s entire body grew warm, her heart rate picked up, her mind grew fuzzy, her mouth went dry, and her tail lifted of its own accord. A deep, throbbing ache developed in her belly, a sudden trickle of fluid running down her leg.

“Hooooolllllly...” She blushed as she caught whiff of a mare’s scent—her scent. “I-I forgot that I’d be…”

“Ohhhh, yes.” Eros raised his head and inhaled deeply. “You’ve got it bad, too.”

“D-Damn it...” Gleaming flushed as the feelings picked up. “Why didn’t you remind me of this?!”

“I didn’t think I needed to.” Eros’ wings were spreading now, fanning out to their full span. “It’s kind of a necessary component of the process.”

Gleaming's eyes drifted to Eros’ groin. His long and thick stallionhood was slipping free, twitching and inflating larger with every beat of his heart. Unbidden fantasies of being stuffed full with that wonderful rod danced through her mind, his heavy weight atop her, pinning her down...

“Nngh, I don’t know how long I can wait...”

Eros looked up at the clock. “Don’t worry, Future-Me should be arriving any—”

There was a flash like lightning. Crackling sounds filled the room as a jagged tear in space formed over by the closet door. Multicolored light spilled out as the rift became taller and wider, causing both of them to squint and shade their eyes. The silhouette of a stallion appeared and carefully stepped through the tear, and when he was fully through, the rift disappeared behind him with a CRACK!

The newcomer grinned. “Hello, hel-lo.”

Gleaming blinked several times. Standing before her was a second Eros, identical in every to the first! Same body, same manestyle, same boyish smirk… even the same raging boner.

“My sweet Gleamy...” Eros waggled his eyebrows before sauntering over. “Feeling frisky? Antsy? A little wild, hmm? Don’t worry, we’re about to fix all of that…”

Now Gleaming was the one licking her lips. The haze in her mind was getting thicker, the fire in her core burning hotter...

“Hey there, handsome,” Past-Eros cut in. He gave Gleaming one final kiss on the cheek before guiding them both into the arcane circle. “Ready for some fun?”

Future-Eros’ smile turned devious. He took a sniff of the air, his wings spreading as well. “You have no idea.”

“You’re good to go, right?” Past-Eros asked. “No problems?”

“None.” Future-Eros stopped at the edge of the array, giving Gleaming a teasing wink. “Operation: Family is go.”

Gleaming’s knees were growing weak. She was in the center of the ritual circle with two horny alicorn stallions circling around her like sharks. Every fiber in her body was screaming at her to lunge at one of them, but her willpower held her fast.

“Eroooooos…”

“Almost ready, Honey.” Past-Eros cast a spell under his breath, and an enchanted glass vial filled with a clear substance suddenly appeared in his magic. “But we can’t start without this.”

Gleaming frowned. “What’s...”

Past-Eros lifted the vial up to examine it in the light. “Just a little insurance to make sure this takes. We’ve only one shot at this.”

Gleaming swallowed hard. “Th-This is really happening, isn’t it… we’re really g-gonna do this...”

Past-Eros smiled. “Having second thoughts?”

“NO!” Gleaming felt her folds winking. Her eyes unfocused as her breathing became fast and shallow. Past-Eros began casting a spell behind her, and the Crystal Heart above responded with a ringing that drowned out the pop the enchanted vial’s cork. “Gods, no… I want this...”

“Ah, I never forgot these months,” Future-Eros purred. “How happy you were the whole time, how good you said it all felt. You kept going on about how full you felt, but somehow, all you wanted was more...”

That did it. Gleaming tried to tackle him right then and there, but her hooves were... stuck to the ground? She realized that the lines of the array had started glowing, the light already up to her knees...

“Bastards!” Gleaming ground her teeth as the light fully enveloped her. “Double-teaming me whiiii—OHHHH, YES!”

Her tail had been yanked to the side. A tendril of liquid probed at her glistening entrance before slipping in and traveling up her newly-christened passage. It entered her fertile womb to become embedded in her walls, and the instant it did, the heat between Gleaming legs became an inferno.

“FFFFFFFFUCK!” She wriggled and squirmed as hard as she could, the edges of her eyes glowing pink with the ritual’s magic. “HURRY AND TAKE ME ALREADY!”

Past-Eros nodded to his future self. They both entered the glowing circle, cocks bobbing as they advanced on their frazzled mate.

“Shhh,” Past-Eros said from Gleaming's left. He nipped and pulled on her ear. “It’s alright, Honey….”

Future-Eros pressed a hoof into one of her cutie marks. “Everything will be fine…”

“We promise you’ll enjoy this…”

“Oh, very much so…”

“THEN HURRY UP AND DO IT!” Gleaming snarled. “F-FUCK ME HARD!”

Future-Eros snickered. “As our love wishes.” He positioned himself behind Gleaming and reared, settling on her small, sturdy frame. His eager cock slapped up against her as he adjusted himself.

Past-Eros kissed Gleaming's forehead before licking the base of her horn. “Oh! Just one more thing before we start, Dear...”

His slippery tongue nearly made Gleaming go cross-eyed. “Unnnnngghh, whaaaaaat…”

“Mmm, It’s not something you’ll object to.” Past-Eros licked up and down the fluted length. “See, the fluid I just put in you is to make you more fertile. That means there’s a good chance this pregnancy may result in you having twins... triplets… or more.”

The words were powerful enough to punch a hole in the fog.

“You mean…”

Future-Eros leaned down to whisper in her ear. “You’re gonna be a great parent.”

Then he plunged into her with a smooth, powerful thrust. At the same time, Past-Eros took her horn into his mouth and started sucking on it, and Gleaming screamed her approval so loud and long that half the castle heard. The Crystal Heart above began to hum, tendrils of the ritual’s magic coiling around it.

Future-Eros could only fit himself halfway into Gleaming's snugness. He pulled back with a grunt and spread his backhooves a little farther, then shoved back into her with even more force. He sank in another inch, and from there on he began moving back and forth like a piston that drilled a tad deeper each time.

Meanwhile, Past-Eros was running his tongue all around Gleaming horn while bobbing his head up and down. He mostly kept his attention on her tip, which was now emitting constant sparks that tickled his throat. He’d occasionally tighten his lips and swallow so he could properly suck on her off, causing a torrent of sparks to surge out. He continued this pattern while gradually increasing his pace, and as he did, his hoof unconsciously strayed down to rub his neglected shaft.

Gleaming was in heaven. The weight of a stallion on her back, the heavy scent of sex, the feeling of fullness and being stretched wide, the warm slickness of Past-Eros’ tongue, the lewd squishing and sucking sounds, their hot breaths in her ears. She couldn’t believe she hadn’t cum already, but then remembered Eros has said the spell prevented orgasms until the Crystal Heart was fully charged. The pressure in Gleaming loins was well beyond her normal peak already, but still it built and built without any sign of stopping. Fortunately, both of Eros’ efforts to ravish her were gradually picking up, and as they did, the Crystal Heart above hummed louder, louder...

“E-Er—” Gleaming cut herself off with a throaty moan. She took a shuddering breath and tried again. “E-Eros, more... I n-need… more!”

Future-Eros squeezed her tighter. “More, eh?”

Gleaming queaked. A tendril of magic had was poking at her backdoor, gradually snaking its way inside her while getting thicker. It assumed the shape of a phallus and began vibrating, occasionally rubbing against the thin barrier that separated it from Future-Eros’ thrusting member.

Gleaming's eyes rolled into the back of her head. The pleasant tingling added to the roaring firestorm within her, the Crystal Heart above now shining with sapphire light.

But it wasn’t near enough.

“More!” she cried.

This time it was Past-Eros who complied. While still servicing her, he reared and put his forehooves on her shoulders. She saw that his stallionhood was enveloped in a pink hue, the the foot-long rod growing—thirteen inches... fourteen inches... sixteen… nineteen… Her jaw hung slack as she realized what he intended, and she found herself drooling as it came closer and closer to her face.

When Past-Eros’ dick reached two feet, she was able to stick out her tongue and touch his tip. It continued to grow until it entered her mouth proper, quickly pushing past her lips and filling all of her maw. She sucked on it like a lollipop, swishing her tongue all around it and greedily swallowing his pre. Past-Eros groaned and took in the full length of her horn, wrapping his lips around the base and making his mouth as tight as possible.

The Crystal Heart was ringing now. The thick air sparked and crackled, the magic swirling around the three of them like a tempest. Gleaming was drunk on the sensations, lost in them like a rowboat in a raging storm. The pressure just kept on building. The fire inside her just kept getting hotter. Future-Eros was fully hilted in her now, the rhythmic slapping of his relentless pounding filling her ears. His magic vibrator had reached a fever-pitch, and Past-Eros’ twitching cock was completely filling her mouth. He yanked on her mane as he pushed deeper into her mouth, causing it to slide down her throat.

The three of them became fully enveloped in the Crystal Heart’s light. Pulses of magic were now radiating off the artifact that funneled into Gleaming, the pulses coming faster and faster. Their efforts became erratic and frenzied as all three of them felt their climaxes approach and with one final thrust each, the Crystal Heart released a shockwave with a clear, deafening note.

It was like the hottest fire being extinguished with the coldest water. Gleaming’s body shuddered and convulsed as her muscles clamped down on Future-Eros’ rod, even as it pumped her full with shot after shot of virile cum. She could feel magic erupting from her horn and into Past-Eros’ mouth, and also his cock swelling within her own, his seed spilling down her throat. She was being filled from both ends, swelling with their divine fertile essence, and the torrent of endorphins made her feel like she was flying. It just kept stretching on and on—and Gleaming could only hold on for so long before she whited out.

The first thing Gleaming noticed was that she’d been moved over to the bed. The second thing she noticed was that she was on her back with her hips propped up on pillows. The third thing she noticed was that Eros was right next to her, nuzzling, cuddling, petting, and generally just spooning the daylights out of her. His warmth added to the warm, tingling heat deep within her belly, which was one of the greatest feelings she’d ever felt.

She was about to ask if he was the past or future version of himself, but he beat her to the punch.

“Future-Me’s gone,” he said with a smile. “It’s just us again.”

“...Oh.” Gleaming shifted her lower half so she was more comfortable. “That was quick… How long was I out?”

“About forty-five minutes.” He kissed her and hugged her tighter. “I half expected you to sleep through the night. You absorbed some pretty potent magic there.”

Gleaming's kissed him back and looked down at her own elevated torso. “Did it work?”

“Mmhmm.” Eros patted her stomach. “Congratulations, Honey. You’re pregnant.”

“Heh.” Gleaming leaned into his embrace. “I suppose I should enjoy sleeping while I can then.”

“Oh, hush,” said Eros. “I already told you you’re going to be comfortable.”

“Yeah, but...” Gleaming hugged him tight. “I’ve… I-I’ve never done anything like this before.”

He stroked her mane. “I’ll be here for you every step of the way. No matter what, I’ll be there for you.”

Gleaming leaned more into his embrace. “Even when you’re listening to petitions in court?”

Eros laughed. “Oh, now that’d be an interesting backdrop. Petitioners coming in with petty problems only to be snarked at by a hormonal, pregnant mare. I can only imagine the reactions.”

“Hey, It might deter some of the whiners,” Gleaming said with a small smirk. “Heavens know we get enough of them.”

“True,” Eros said. “Although they always wind up coming back.”

Gleaming rolled her eyes. “Unfortunately.”

A silence formed. They cuddled for a while, but Gleaming's gaze was inevitably drawn down to her currently-flat belly. She focused in on the warm feeling inside her and let out a contented sigh. She thought she’d be nervous or panicking, but in truth, all she felt was peace. She was doing something that almost all mares did, wasn’t she? It shouldn’t be too—

And that’s when her heat flared up again.

“Oh, geez...” Gleaming’s eyes fluttered half-closed. “Eros…”

Her husky whisper made Eros pause. “Yeah?”

Gleaming ground against him, already massaging his sheath with magic. “Y-You might wanna cast a stamina spell...”

Eros smiled as his dick slipped free. “Way ahead of you.”