Estrus among us

"That...idiot!" growled Twilight. The other ponies and Alex startled and whipped around to look at her.

"Wait...is something wrong?" he asked.

Twilight exchanged a frustrated pout with Pinkie, then said with a sigh, "No...Alex, nothing's wrong. Pinkie and I just...have something to which we need to attend; you four don't wait for us." Alex remained skeptical, but he shrugged and turned back to Lyra, Bonnie, and AJ, as Twilight and Pinkie hurried off.

"Shall we, ladies?"

Lyra beamed up at him and frantically nodded. "Oh, Sweet Celestia YES! Follow me!" But just as they were turning the last corner to the Shoppe, they were stopped by a voice behind them.

"Hey...what's going on? And who is that?"

The four of them turned around to see a rather wall-eyed, blonde pegasus mare staring up curiously up at them...and as far as they could tell, she was mostly staring at Applejack. "Oh...hello, Derpy," said AJ, "Ah guess Ah look a sight, don't Ah?"

Derpy smiled. "I like it! You look really cute, Applejack...!" as she walked around her. Then she stopped in front of Alex. "Just like...this one!" She stepped closer to him. "And you must be the...hoo-mun?" She smiled up at him and waved a hoof. "Hi, Mister Hoo-mun! I'm Derpy!"

Alex tentatively waved back. "Umm...hello, Derpy. I'm Alexander. Alex, for short."

Derpy scrunched up her face, shut her eyes, and stuck out her tongue, trying to concentrate. You could almost see the sparks flying out of her head as she tried to pronounce his name.

It was painful to watch.

"Ahh...wexxx...ehhn..dERRR?" she finally managed. She shook her head and smiled once more. "I can't say that! I'll just call you 'Mister Hoo-mun!"

"Human," Lyra corrected her, "...and if you don't mind, we're very busy!" Derpy looked around at all of them, then settled her...gaze? back on Lyra.

"You all are up to something...secret, aren't you?" Her face brightened, and she started bouncing on her hooves. "Oo! Oo! Tell me! I can keep a secret! I promise!"

Applejack smiled down at her. "Sorry, sugarcube. We'd tell yah, but it might scare yah. Celestia knows it scared the bewillikers outta me!"

They all then turned away and continued to the Sweet Shoppe, but stopped when they heard a low, "...I'm not stupid..."

All of them turned back and looked at her. "Ah...Ah didn't say that, honey...Ah jus' meant...whut we're gonna do involves some...Human magic wif some...unusual side-effects...an' you might not like 'em."

Derpy glared at her (as best she could) and asked one question: "Does it involve sex?"

They all exchanged looks, which told her all she needed to know. Still, AJ kept trying. "Well, yes, but there might be that side-effect I was talking to you about that you---" but she was cut off.

Keeping her...gaze...on Applejack, she retorted, "You mean like, "turning into a hoo-mun?" At their stunned looks, she frowned and repeated herself. "I'm not stupid." She then turned to Alex and smiled up at him, then drew closer. Lyra, however, was nearing her limit.

"You don't even care about Humans like I do! Why would you want to be one?!"

But the blonde continued as if she hadn't heard. She leaned in close to Alex and took a hearty sniff.

"Mmmm! I've never smelled a hoo-mun before! You smell really nice!" Alex began to blush from her attention...AND from her lack of..."personal space." To make matters worse, she then stood on her back hooves and placed her front ones on his chest. Then she closed her eyes and stuck her snout under his chin, again breathing in deeply. "Mmmm...even better up close..."

Lyra's face flushed. "Alright, that's IT! You get off him, RIGHT! NOW!" She gnashed her teeth and started forward, but was stopped by the farmgirl.

"Lyra...let Alex decide, hon...we ain't his owners..." Alex glanced at the mares then swallowed as he looked back down at the sultry blonde. He noted the 'bubble' cutie mark she had on both butt cheeks...and the fact she had a fat, bubble ass that could easily rival Rarity's, and, once you got past her eyes, a sensuous mouth that could make a cock very happy! A trickle of sweat began to form on his brow.

"Umm...Miss, I---"

"Call me Derpy, Mister Hoo-mun..." she whispered, as she lay her head on his chest.

He blushed again and said, "O...okay, Derpy...it's not like I'm not interested, but Lyra's right: she has been waiting for a long time, so...

She raised her head and pouted up at him. "It's my eyes, isn't it?" Her bottom lip began to quiver, and fat tears started to roll down her soft cheeks. "...it's not my fault..." she whispered as she closed her eyes, buried her head back on his chest, and began to softly weep.

Alex immediately hugged her, accidentally brushing his hands across her wings, which made her gasp. "No, Derpy! I don't mind your eyes at all!"

But around them, the other mares all exchanged knowing glances. All of them had lost count of the times they'd seen her pull this Exact. Same. Stunt on an unsuspecting guy, which was why her..."bed count"...remained among the highest of Ponyville's mares. It truly was a marvel to them she had only the one child, and darker minds could only imagine what the little filly must be exposed to! Conversely, the more reliable gossip mill reported Derpy was also a doting mother that never, ever took her "conquests" home, but where she did go with them for her...ahem..."fun times"...nopony else knew for sure.

Derpy sniffed, wiped a tear away, and looked back up at him. "You...you mean it?" He smiled down at her.

"Of course I do!" Then Lyra, knowing defeat when it was right in front of her face, spoke up.

But she couldn't look at her.

"If...if you want...you can come with us, Derpy..." she said through clenched teeth.

She threw up her hooves and went, "Yay!" and then fell back on all fours. As she did, she lost her balance and fell forward with her snout right in Alex's crotch! "Oops! Sorry!" she mumbled, but then closed her eyes and nuzzled his hardening cock, breathing in deeply of his masculine scent, then turned a half-lidded gaze up at his shocked face and moaned, "...oooo...you have a BIG one, Mister Hoo-mun... this is going to be FUN..." then she turned and ran ahead of the mares to the door of the Candy Shoppe, shaking excitedly and making her ass jiggle provocatively as she waited for them to open it. Lyra sighed, exchanged a sour look with her marefriend, then magicked up her key to unlock the door.

As they all made their way inside, Lyra and Bon Bon were quickly reminded of why they seldom allowed the ditzy mailmare into their pristine, ordered Shoppe, for no sooner had she entered than she became distracted by all the brightly colored candies and sweets, went, "Oooh!" and rushed over to a counter, knocking several jars over in the process. Lyra was juuust able to grab them all in her magic before they shattered, set them all carefully back on their shelves, then with an exasperated look at the klutzy blonde she waited for her to stop rummaging, horn at the ready, while Bon Bon led Alex and Applejack up to the private rooms.

Completely oblivious to all the chaos she'd almost caused, Derpy turned back to Lyra with a hoofull of carefully wrapped chocolate and mint-swirled nougats and excitedly asked, "Hey! Are these new?! I've never seen these before!"

Counting silently to herself in her head, Lyra slowly marched up to her, gently but firmly took the candies from her hoof, and through clenched teeth said, "Derpy? We. Are. NOT here for candy."

Derpy giggled. "I know! But I always like to eat some sweets after I suck a guy's cock!" She sighed with a dreamy look in her eyes, "Their cum always tastes better with some candy..." Seemingly unaware of Lyra's stunned silence, she glanced up at Alex's retreating back and added casually, "...and from the size of Mister Hoo-mun's balls, my tummy is going to be really full of yummy cummy!" She licked her pouty, dick-sucking lips. "I can't wait!"

Without a word, Lyra gave her back the candy and left to follow the others to the bedrooms.

From the shadows not far from the Sweet Shoppe, under the trees, a solitary mare lowered her field glasses and took out her pad and pen. She jotted down the number of ponies, who they were, and with special notes concerning the altered Applejack. Contrary to the image she publically portrayed, which was to scoff along with other ponies at Lyra's "silly Human obsession," the mare was just as well-versed in Human lore as she, maybe even moreso, though the mare did not share her enthusiasm for the species.

That was...until she'd had that thrice-cursed dream!

Now Rose was a mare possessed...and seeing the herd of them entering the Shoppe with the Human...and with Derpy, of all mares! meant only one thing: something...lascivious...was going on...and somehow...someway...she was going to be part of it. Even if it meant turning into a Human herself, as Applejack's condition and the others she'd seen clearly showed this...Alex...(Oh GAWD just thinking his name made her knees go weak!) had discovered the ancient magic. When she'd first spied them all at his house, she'd been rightly terrified, and had tried to warn everypony without giving away too much of her knowledge, but then...that...damn...dream! Now, as a result, she was past caring about such trivialities, for her need to be hunted down and raped by this Human was simply too great! If not tonight, then within days.

Or she would go mad.

"Yes, Your Highness?" Sweetie Drops had stopped speaking when Luna had held up a hoof.

"Hold," she said, then took another sip of her drink. "One question I have for thee: how didst thou know of Rainbow's and other ponies' actions when thou weren't there? Me thought thou were relaying only those events thou witnessed, in explaining those..."fun ways possible" thou spoke of."

Instead of answering her, Sweetie looked at Celestia, who was barely suppressing another giggle.

"Dear, sweet, Sister! Do you not know this is not our only agent in Ponyville?"

Luna stared at her Sister, then looked back at their Agent. Tossing back her drink she sighed, enjoying the burn, and then poured herself another. She then nodded and said, "Please continue."

By the time Lyra and Derpy made it up to the bedroom, Applejack and Bon Bon had the Human already undressed and lying on the bed! "Whee!" Derpy laughed, "You mares aren't wasting any time!" as she jumped on the bed and pounced on Alex's cock and began happily, sloppily sucking! "...mmmmph mmmmph mmmmph...delicious..." she moaned as she raised her head for only a moment, then dove back in for more.

But Lyra was strangely subdued as she stood at the doorway, trembling. Bon Bon looked up at her and frowned. "What's wrong, babe? I...thought this is what you always wanted?" Lyra looked up at the Human, who had his head thrown back and his eyes closed as the blonde mare was swallowing his cock, then quickly cast her eyes back down and looked away.

"It is, it is...but..."

Bonnie read her face, then turned to the other mares. "Okay, everypony out," as she climbed off the bed. Applejack nodded and followed her, but Derpy was...a little slow on the uptake. She still had her wet mouth wrapped lovingly around the Human's dick and her front hooves gripping his thigh when she looked up at Bon Bon's order.

"But...I'm...(sluuurpsluuurpsluuurp)...not...(mmmmmph)...done...(suuuuck)...with...(mmmmmph)...this...(sluuuurrrrrp)...cock..." she managed between mouthfuls. Applejack picked her up (the contact making a thrill shoot through the mare), making her mouth pull off his dick with a >pop< as she flailed her hooves at his cock in a 'gimme that!' motion while being carried off. "...nooo..." she moaned, "I waaaaaant ittttt..." whining like a filly who was being denied a cookie.

Applejack smiled and carried her out of the room. "You'll get to suck his cock again, sugarcube, just...not right now."

As Bon Bon passed her, Lyra whispered, "...thank you...", who in turn gave her a sweet kiss, then closed the door after her, leaving her alone with the Human.

As the other mares were headed into the other living quarters, Applejack's face suddenly blanched, and she froze in place. Bonnie looked up at her in alarm. "Applejack? What's...wrong?"

It took her a few moments to speak, but not before setting Derpy down, placed a hand over her own mouth, stared at the floor, and whispered, "Granny...Apple Bloom...Ah ain't seen them in almost a day! They must be worried sick! An Ah jus' bin havin' sex all day, an' not thinkin' of them! Whut's wrong wit me?!" She looked over at the mares before turning for the stairs. "Ah gotta go!" And then she was gone.

Night had fully fallen, and Luna's Moon shone brightly in the sky by the time Twilight and Pinkie made it back to Alex's house. The entire march to the house Twilight's face had been set in a scowl, so much so Pinkie had made no attempt to speak to her, she only dreaded what she might say once they finally reached the house and saw whatever it was that Dashie had done. Twilight barely glanced at the mares that were still in a dazed, erotic pile off to the side of the house, and the few that noticed her did not get in her way! One look at her face was all they needed to know that Princess Twilight was not in a mood to be trifled with at the moment! But just before the angry alicorn set her hoof to the door, Pinkie did lay her hoof on her shoulder and say, "Twilight...I know you're angry...but, please...try not to say anything you'll regret!"

Twilight rounded on her. "Angry?!' You bet I'm angry! Of all the brainless, stupid, irresponsible things I have ever seen that mare do, after both Applejack and I explicitly warned her, if she's ignored all that and had sex with Big Mac anyway, there is no telling what we'll see once we open this door!" So, without another word, Twilight shoved the door open and stomped inside.

There, illuminated only by the dying fireplace and a single lamp, was the sight of Big Mac lying supine on Alex's recliner, with Rainbow settled between his legs, with her eyes closed as she slurped and sucked on his massive cock. She glanced briefly up at her friends, and waved, but never stopped bobbing her head up and down as she hollowed her cheeks and sucked harder, trying to get as much of his dick in her mouth as she could. Both Twilight and Pinkie were stunned at her changes. Twilight started with, "Rainbow, what have you---" but she was cut off by Big Mac raising his hand.

"Ha...hang on a se...second...Princess," he asked in a shaky voice, "...let...let 'er finishhhhh!!!" he grunted as he arched his back and came down the newly changed slut's throat, jerking his hips up and down while gripping the chair, his eyes rolled back and his tongue hanging out. Rainbow's eyes rolled up in bliss and she moaned around her mouthful, gulping down every load of his thick, creamy spunk until he relaxed, sighed, and fell exhausted back into the chair. Then she suuuuucked him all the way out her throat, smiled, and lay her head on his thigh, as she continued to stare in worship up at his still erect cock.

But she wasn't the only one.

While Twilight had frowned and turned her head away and waited for them to finish...Pinkie? Pinkie had watched with what could only be described as...RAPTURE. Mac's pheromones were filling the air, not only from the display before her but from the trio's earlier..."adventures"...and were much, much more potent than when they'd been there before, and she was feeling their full effect. She closed her eyes and took in a deep breath, then shuddered as a mini-orgasm went through her. Then she opened her eyes. And as she stared at his cock, still glistening with Rainbow's spit, her pupils became replaced with sparkling cartoon hearts, she started panting, and her tongue lolled out as she began drooling. Over her head, more cartoon hearts began appearing and popping like soap bubbles, as she lifted off the floor and began floating towards the huge, meaty, wonderful dick! Like a sleepwalker, she moaned, "...must...have...cock..." as she floated nearer.

Twilight looked up just in time and shouted, "Pinkie! Nooooo!!" and tried to grab her in her magic! But even though Mac was..."third generation" Human, her magic still fizzled out because Mac had put his hand on Pinkie's head, unknowingly blocking her magic! Pinkie's mouth had juuust closed around his cock and was beginning to suck it when Twilight, in desperation, flew from her place and tackled her, sending them both flying across the room!

Pinkie struggled with her as they fought on the carpet. "No! Must...have...delicious...cock!" she yelled as she tried to free herself.

But Twilight refused to let her go. "Pinkie! Snap out of it! Do you want to turn into...whatever it is Dash has become?!" she yelled back, as she exerted her Alicorn strength against Pinkie's desperate Earth pony's. At this, Pinkie relaxed and fell limp, gave a quick look at Rainbow's ass, then hung her head in shame.

With tears beginning to form in her big blue eyes, she looked up at her friend and said, "Thanks, Twilight...I...I don't know what came over me! I...I couldn't help myself!" Twilight slowly released her, then stood, keeping a careful eye on her in case she relapsed, then turned to face Mac and Dash.

"Big Mac? I'll thank you to put that...thing...away, and leave us alone for a while, please?" Mac stood, and without a word made for the stairs and back up to the again fucked-into-oblivion ponygirl, but he didn't miss the hungry look Twilight gave his cock as he strode past. Twilight blinked, sucked the drool back into her mouth, shook herself to regain control, then settled on the former pony. She took a few steps closer, with Pinkie at her side, and looked down at her. "Rainbow Dash. What. Have you done to yourself?"

Rainbow was still lying with her head where Mac's thigh had been, with a blissful smile on her face. Her arms hung down by her sides, with her legs spread out behind her, and her new bubble ass sticking out prominently as she sighed up at them and opened her eyes. "Hey, guys..." she answered slowly, then sat up and looked around. "Where did my big dick go? I wasn't done playing with it..."

Twilight's brow lowered. "Rainbow Dash!" she yelled, "Look at you! You're not a pony, you're not a Human! What's wrong with you?!"

But Dash simply yawned, then stretched. "I guess I'm just too horny to care right now, Twi..." She got shakily to her hooves, then said, "Now, if you two don't mind, my pussy still needs filling..." She flapped her wings, intending to take off.

Nothing happened.

At once, her face lost color, as she tried again. She didn't move an inch off the floor...then real panic showed on her face. With wide eyes, she stared at her friends. "What...what's wrong with me?! I...I can't fly!"

Twilight closed her eyes and sat heavily down. Taking a deep breath, she opened her eyes and said, "Rainbow, that's what I was trying to tell you." She raised a hoof and pointed to her butt. "Look...look at your flank."

Rainbow stared at her, then at Pinkie, then slowly twisted her back and rotated her gaze down to her own ass.

Only to see it was completely blank.

"My...my cutie mark! It's...gone!!" She turned wide, frightened eyes up at Twilight. "What...what does this mean?!"

Twilight closed her eyes again, then encased her in her magic. Then did it again. Then once more. When she finally opened her eyes, she was crying.

"Rainbow...you...don't have any Equestrian magic...at all."