Twilight awoke early the next morning feeling better than she had in a very long time, her heat still totally quelled in a way she'd never before experienced. There was only so much a dildo could do for a mare's estrus after all, even an enchanted one...

As she tried to turn over, Twilight found her Spikey behind her now, holding her against him and making her the little spoon of the cuddle. As much as she enjoyed being held to his warm, scaled body, she knew she couldn't simply remain in bed all day. She had a few things she needed to do before Spike awoke.

After carefully extricating herself from her lover's gentle grip on her by utilizing her magic, Twilight went to the restroom to 'freshen up' from the previous night with a quick shower, then went to the camcorder still at the end of the bed and removed the magic vessel from it, which contained the recording of last night. She then magically duplicated it, making three copies with the same contents. She obviously felt some hesitancy at what she was about to do, knowing what the vessel contained, but also knew her own feelings couldn't get in the way of scientific progress. Besides, she'd have to tell them all eventually anyways if all went as she planned it might.

After writing a letter to each recipient explaining the situation, Twilight placed each copy within an individual envelope along with its appropriate letter and sealed them with her own official seal she'd gotten, letting them know it was truly from her. She then paused in her actions and thought about Spike again. This wasn't right.

Twilight sighed as she focused on the envelope, the runes of the teleporting magic in the front of her mind...before she let it drop to the floor again. She couldn't send it. Spike wouldn't have wanted this, and she...didn't want to go against his will. She knew she would likely need some help if she truly were pregnant with his...brood, but their partnership was more important.

~ ~ ~

Spike awoke a few hours after Twilight had, stretching out and scratching along himself, quickly learning he was alone in the bed. For once, Twilight had actually awoken before him. As he went to get up he quickly felt stickiness along his side as he pulled the bottom sheet up with him, a light blush blooming as he realized just what it was as memories of the previous evening rushed back to him. As he got up off of the bed after peeling the sheet off of him, he quickly went to the restroom to shower, cleaning himself of the dried remnants their earlier lovemaking had left behind.

After finishing a few minutes later, Spike proceeded to clean the bed, putting the dirty laundry in the wash and putting new bedclothes on the mattress after doing his best to clean off what had seeped through the other sheets. After all that was done, Spike heard his stomach rumble, quickly reminding him of how hungry he felt. Unsurprising, given how much energy he'd expended those few hours ago.

Upon opening the door to Twilight's bedroom, Spike quickly picked up on the scent of blueberry pancakes and fried eggs, with the additional scent of gems peaking his interest that much more. Is that...sapphire?! Spike wondered as he moved down the stairs, quickly landing at the base of the stairs and moving towards the kitchen and the sounds and smells of breakfast.

Sure enough, Spike saw a shiny, blue powder within a measuring cup; the few small fragments of the magically-pulverized originals indeed confirming to him they were sapphires, his favorite gem. Twilight turned to him as she heard him getting closer to her and soon walked over to him, letting the current pancake cook. "Morning my special little guy!" Twilight said in a motherly tone, before placing down a plate of sapphire-blueberry pancakes before her mate, soon after drizzling them with syrup and another generous sprinkle of sapphire fragments, topping it all off with whipped cream and completing Spike's favorite breakfast.

Spike heard her calling him that childish name, and felt as another blush started to grow warm; "Moooom!" Spike whined out in embarrassment at such treatment. His blush only burned hotter at the feeling of Twilight ruffling the ridges on his head playfully before going back to the food and minutes later coming back with a plate of her own blueberry pancakes, with hers lacking any sapphires given ponies couldn't eat gems.

They ate in silence for a while, neither saying anything until the silence became stifling. "So...um... about last night..." Twilight started, instantly hearing a sharp clank of Spikes fork on his plate as he apparently dropped it, then a scraping as he scrambled to pick it back up. After such a reaction Twilight was hesitant to continue, but what needed to be said needed to be said, especially if any wheels had been set into motion by their breeding last night. "Well, first I want to say I love you, and thank you so much for what we did. I...really, really loved it." Twilight said sincerely, reaching over to give her lover a kiss on the side of his snout.

Spike only nodded as he continued eating, quite hungry and eating quickly as such, finishing his first serving of pancakes and getting up to get more. Before he could however, Twilight levitated him over another stack of three pancakes and got a nod of thanks from him. She'd learned long ago to make double what she used to when he was a baby upon Spike hitting puberty, with his appetite easily doubling as he did. As she watched him dig into the second pile, she decided she needed to tell him what she'd wanted to do. He had every right to know.... everything.

"Spike, this morning I wanted to send a letter and a copy of our...documentary...from last night to the three other Princesses so that they can help me decide what to do next." Twilight asked, bracing for his reaction.

Upon hearing what she wanted to do, Spike nearly spit his mouthful of pancakes all over Twilight, barely managing to choke them down as he stared at Twilight wide-eyed, almost disbelievingly of what she'd said. "Y-you WHAT?!" Spike squealed out, his panic manifesting upon thinking what would come of it if she did. He stared at Twilight for the next few minutes wide-eyed, his brain still trying to calculate what she'd said, his claws feeling numb and cold now and his heart in his stomach.

Twilight had expected such a response, remaining cool and professional, not letting her own inner turmoil at what she wanted done and its possible repercussions show. She had to be the strong one, as she'd initiated it. "Spike, calm down please. I promise I have a good reason, just let me explain myself." she said, seeing Spike indeed taking a few deep breaths as he worked to calm himself, with her herself keeping a tight grip on herself, fighting not to show her own feelings on the matter.

After Spike had stopped hyperventilating a while later, Twilight finally took a deep breath of her own and prepared herself. A lot needed to be said. "Well to start with, Spike, you and I are likely the first pony and dragon couple in current history, let alone the first recorded pony and dragon to breed within many, many thousands of years. As such, that gives us a prime example of learning whether or not ponies and dragons can...miscegenate." Twilight finished. The confused look on Spike's face showed he had no idea what she was talking about, so she tried a different phrase; "Inter-fecundate?" Still, he remained dumbstruck, so finally with a frustrated grunt she chose to paint it in black and white; "To learn if a dragon can get a pony pregnant, or vice-versa."

That one hit home, and Spike gasped softly at the realization of what they'd done last evening hit him in full; he'd inseminated Twilight, multiple times not to mention, during her heat, planting his seed directly into her womb when she was most fertile! "B...b..but that's not possible, is it?! I mean, ponies and dragons are so...different! How could they possibly...have foals?!" He asked, expectedly panicked at the possibilities this brought up. The possibility that he may become a father in some months, with a pony mare!

Twilight heard his panicked tone and barely held herself back from joining him, instead bringing a book forth from upstairs in her room, having placed it on a study table earlier for easy access. On the front of the large red cover, engraved in gold, were the words 'Legends of Pony Hybrids Throughout History'.

Opening the book, Twilight quickly moved to a bookmark she'd made during her earlier review of the book, having read it soon after Spike had shown his true feelings to her, mainly wanting to learn what she was possibly getting into. Upon the book laying flat and Spike seeing an illustration on the page, it became all too real. There, illustrated in this historical book, was a sketching of what looked like a pony with a crest of draconian fins on its head but also a mane of hair, its thin dragon tail ended with a large plume of a pony's tailhair, large membranous wings with a row of feathers on the edges, its legs long and slender like a dragons but ended with hooves as it stood quadruped, and its whole body covered in both scales and fur; a very obvious hybrid of dragon and Pegusus features.

"Now, this was a 'kirin' that was allegedly named Swiftwing the Fleet, and was said to be the child of a male green dragon and a female Pegusus, both of whose names were lost to history. He was allegedly very, very fast both on the ground and in the air." Twilight paused, turning the page; "...and this one..." she said, the page showing another pony-dragon hybrid that looked very similar to the first in basic anatomy, but lacked the wings and had more scales than fur. Instead of the wings, on its forehead was a very obvious horn that looked similar to a unicorn's, but had a more jagged appearance almost like a changeling queen's. "...is Silverfang the Wise, who was supposedly most talented at magic. There are even tales of him besting a few top Unicorns in his arcane prowess without much effort at all. The most interesting part of him is that...that he was rumored to be conceived by a male purple drake and a Unicorn mare..."

That perked Spike's attention even higher, the reality settling in as all of this legend was brought to light, the fact that this all may have happened before making him both nervous and excited at the prospect; something his and Twilight's friend Pinkie Pie may call 'nervous-cited'. He was fascinated beyond belief that ponies and dragons could possibly inter-breed, but at the same time horrified that he was having a first-claw experience of it.

"T-Twilight, does this mean...what I think it means?" Spike asked, looking to Twilight once more, with her meeting his eyes. Slowly she started to nod, before stopping herself.

"Well, these recountings ARE many thousands of years old, so who knows how true they may be. That, and the fact that some ponies really like to write falsehoods sometimes. That's why I want to call upon Princess Celestia and Princess Luna. They'd know if these legends are true, and if... if it's indeed possible for you and I to...have a baby."

Spike audibly gulped as it was finally vocalized like that, his stomach churning in nervous-citement at the prospect. The prospect he and Twilight may be making history a reality once more, and having a child together in the process.

"Ok Twilight, send them." Spike said with faux-determination; almost instantly regretting his choice, but knowing they would need help just as Twilight had said.

"Thank you Spike. I love you." Twilight said, and after giving Spike a brief kiss, both watched as she lifted the envelopes containing the recording, and a second later they vanished, all on their way to their destinations.

~ ~ ~

Celestia stared in utter shock at what she saw and heard in the magic hologram in front of her; her eyes wide, mouth agape, and wings locked in arousal; watching the poor-quality, shaky filming of what was presumably the 'documentary' the included letter had mentioned. She watch as Twilight poured over every detail of Spike's apparently doubled set of equipment, personally memorizing every detail of those two penises as Twilight commented on them, with Celestia herself not having seen a drake's penes before. "They...they have two?!" she asked herself quietly, watching the camera trail over their every detail, feeling her face grow flush as she saw their every glorious inch.

Celestia then watched as Spike had rubbed himself to orgasm, noticing the quantity of his ejaculate and how much he swelled up, with seeing everything in action making her whole body feel hotter than she'd felt in a good while. She then watched as the camera stabilized as it was placed on a tripod with an upward-facing view of their crotches, then saw as her ex-student had her drake assistant mount her and essentially rut her silly twice, then twice more after a break, watching as Twilight's belly grew more and more swollen with his seed each time Spike climaxed in her, watching her pelvis swell majorly near her vulva with his knot inside her, each pulse after pulse the huge lump made inside her with each spurt of dragon cum.

The details of how it had felt at the end finally broke her tenuous self-restraint. Celestia quickly sealed her door with magic after feeling just how soaked between her legs had grown during the viewing, giving a frustrated grunt as she felt her crotch burning hot in arousal, knowing she wouldn't be able to get anything done at this peak of desire. At least Twilight had warned her in her letter to view it privately, and now she could see why! Rewinding the recording to the start of their first time, Celestia quickly focused her magic and opened the drawer in her bedside table, producing a rather sizable stallion dildo. This was simply too hot and exotic to not enjoy...

"Yeah Spike, give it to me hard..." Celestia caught herself whispering as she levitated the dong to her entrance, before shoving it in hard; "OOOOOOOH yeah...Twilight, do what you did to me our first time..."

~ ~ ~

Dear Cadance,

Contained within this envelope is a copy of the first modern recorded instance of a dragon mating with a pony; as well as a personal, hooves-on study by me on the possibilities of mating and possible cross-breeding of a dragon and a pony. As you are co-rulers of a part of Equestria, I have provided you and Shining Armor with a copy for scientific reasons. Due to its contents, you may wish to view it in private. Just saying!

Professionally,
Twilight Sparkle.

Not so professionally: Sunshine Sunshine, Ladybugs awake!

Shining Armor had quickly dismissed himself after learning what the recording had contained at the introduction, as would be expected of a loving brother, with him wanting no part of anything involving his sister sexually. Princess Cadence had then laid alone on her bed as she watched Twilight examine Spike, Spike masturbating, then the two starting to breed, watching the drake who so long ago saved her Empire from enslavement starting to thrust into her sister-in-law and one of her oldest friends like a common mare in heat.

As the Princess of Love, Cadence had indeed felt a huge surge of love the previous night centered in Ponyville, and found it rather odd that it was centered around Twilight's place in Ponyville...but this explained everything. As she watched her sister-in-law and closest friend, as well as the savior of her empire, going at it like animals, Cadance couldn't help but find herself growing aroused, her feelings of love for them morphing as she watched them in such a way. She knew it wasn't right to feel the way she did, but she'd always had an...attraction to Twilight ever since she'd babysat for her, and watching this was making those feelings resurface.

As the recording finally ended quite some time later after a total of four ruttings and ties, with an outro on what it had felt like for both of them, Cadence felt herself beyond aroused. Her marehood was swollen and soaking wet from rubbing herself during it with her hoof, feeling like she herself was in heat but knowing such wasn't true, knowing instead that she was just really freaking horny!

"S-Shiny?" Cadence called out in an obviously needing tone, knowing her stallion was waiting in the next room and would hear her; "Can you help me with something? You see, I seem to find myself REALLY horny and need a super-sexy stallion to help me with it..."

Within a second, having used a blink spell targeted right for their bedroom, Shining had arrived to his mare's booty call, his eyes wide as he saw Cadence presenting for him as she lay on the bed; her tail was curled over her back and her marehood soaked and lightly puffy as she lay with her rump in the air and her chest against the mattress, most obviously inviting him to mount her with a wink of her clit when she saw him walk in, the flash of her deeper pink insides and clit making Shining's sheathe swell.

Within seconds of smelling her powerful arousal in the air, Shining had instantly climbed on top of his mare as she had asked, softly licking and nipping at her crest and hearing her moan in response as he impatiently waited for his body to ready itself for his willing mate, her croup grinding against his sheathe to help it along. Moments later he started humping softly against her when he'd grown erect, seeking his target—

"SHIIIIIIIIINY~!" Cadance cooed out as she felt Shining sink into her well-prepared body, feeling as he soon after hilted in her and started to claim her as his mare once more.

~ ~ ~

Celestia had later that day noticed a guard limping a bit, and had asked what had happened, noticing then the guard had been Luna's assigned chamber-guard for the day while she'd 'slept'. After she'd asked what had happened to him and why he was limping, the guard got wide-eyed and told her. Luna had telekinetically lifted him from his post, and, after asking his permission, had stripped him of his armor, placed him on her bed on his back, and had sexually ridden him, hard, until he'd climaxed three times in her. She had only released him when she'd had a second climax of her own and couldn't get him erect again.

Celestia could only imagine what would have caused that kind of overtly sexual behavior from her usually docile sister, but knew it could have been only one thing.

~ ~ ~

It was only a matter of hours after sending the letters to the other princesses before they heard a knock on the front door of the library, with Spike joining Twilight to the door. Twilight opened the door a crack and looked out before opening the door fully, letting Spike see the royal trio of Princess Celestia, Princess Luna, and Princess Cadance standing on their doorstep. All stood silent for a while, until Celestia held up her copy of the recording and letter.

"We need to talk." Twilight said instantly before inviting Celestia and the others inside, with the others all silently agreeing in full. Moments later the princesses sat in the foyer, with Twilight and Spike standing in front of them.

"Yes. Yes we do Twilight, Spike." said Celestia in response upon settling, looking to each as she named them. After what she'd seen on that tape, she knew much needed to be said or done now, now that all the wheels were set into motion. After more silence and mental preparation, as well as sedation of her sensual memories of the recording – and longer-past memories she had of Twilight as a filly-in-heat in her bedchamber – given how they had before affected her, Celestia finally spoke up again; "So, you two have indeed bred during Twilight's estrus?" Celestia asked, causing both to tense, before both nodded. "...and then recorded it and sent it to all of us princesses strictly for scientific reasons, correct?" Another nod, Twilight only this time. "So Twilight, you have initialized your plan after all huh?"

This time, only Twilight nodded again, with Spike instead looking at her completely dumbfounded. Plan?

"Yes Celestia, I have. As you saw on the recording, my son Spike here, a young and likely very virile drake, successfully inseminated me last night...multiple times...during the 'full estrus' period of my first estrus, which is the most fertile time of a mare's cycles during a breeding season. I tested myself before inducing the breeding and not only confirmed I was indeed ovulating at the time, but that I'd JUST ovulated within ten minute prior of the test!" Twilight said, a seeming air of pride about her at her careful planning of the event; "So, the odds are that If I don't get pregnant from this, it's impossible for ponies and dragons to inter-breed!"

~

Spike's jaw dropped at that. "T-This was all planned among you all?!" Spike asked, in utter shock as he heard of this all being a 'plan' by Twilight. "T-Twilight, what...?" he said, too flabbergasted to even continue. He didn't know what to think, let alone say! She's planned everything behind his back, and that's why she'd recorded it! This was all some experiment, and he was just a pawn of it!

"Spike..." Twilight said, before going to him and wrapping him in a tight hug, with Spike not reacting at all. A moment later, Twilight pulled away and looked at him, seeing his expression one of deep thought, as well as what looked like a hint of...anger?

"Twilight, is this all I am to you?!" Spike suddenly shouted, before turning to the mare in question, seeing her jump at his sudden exclamation; "Just some...experiment?! Some lab rat to poke and prod and... and use?!" Spike was furious all of a sudden, his voice clearly showing the hurt twisting his gut and chest; feeling used, foolish, and above all, betrayed. "Twilight, I gave my heart to you. I gave my everything to you, and this is how you repay me? BY USING ME FOR SOME BUCKING SCIENCE EXPERIMENT TO SEE IF I COULD KNOCK YOU UP?!"

Twilight quickly shook her head, seeing Spike more furious than she'd ever had, and knew she needed to defuse the situation. "Spike, no! You have it all wrong! I...I didn't! I didn't 'use' you! I...I really do love you!" Twilight babbled out desperately; trying to explain herself, but failing miserably at it.

"Oh yeah, then why are THEY here?!" Spike asked heatedly, pointing accusingly towards the other princesses; "...and why is everypony in on knowing that this is a 'plan' of us...inter-breeding...except me?! I bet you don't even really love me, do you?!" Spike nearly hissed, his rashness making Twilight wince at the last part;"I bet you only used me for my...my sperm! Like some...some cow for their milk!"

Twilight struggled to contain herself as well as she could, trying to think of a way to explain the situation through the cloud of her emotions; "I...I did plan this yes, but...but only after I learned that you loved me..." Twilight said, starting to tear up as she was accused of using her lover as a strictly test subject, of not truly loving him. "I...I did see an opportunity to...to help science, but...Spike, I really do love you. I really DO want to have your child, and have since I started reading on the possibility of it." Twilight could only speak in a cracking tone, tears now visibly streaming down her cheeks as she bowed her head; "I'd...I'd never use you..."

The sight of his mare like this did indeed upset Spike, but he nonetheless felt anger at her seeming betrayal, instead choosing to challenge her in the best possible way his adolescent mind could come up with; "Oh yeah? Do you really love me? Prove it!"

Author's Note

Hybrids? Yep, possibly!