Author's Note

Even under the effects of some of the products in his chapters, the characters are perfectly willing and this one only accelerated things.

The warm library

As the early afternoon arrives in Ponyville, a new experiment of the librarian and new princess of the place is about to come to an end. Taking advantage of the absence of her dragonet companion who had gone to help their friend Rarity, Twilight Sparkle had all the space she needed to work out the kinks herself. Her powder concoction was in place in a bottle floating in her magic before her eyes, a mixture of products from different parts of Equestria that her status allowed her to obtain, just waiting to be used if one knew how.

The greenish color of the mixture as well as the random movements in her glass prison gave the impression of life, which is partly the case because of the crystalline plants used, the essence wanting to escape. Twilight watched it move as she remembered the effort it took to make it personally, a still having been used extensively despite the princess's initially limited knowledge of this type of object. She hoped to have dosed it correctly, as a large sample could prove unstable for those who inhaled it, but her research proved that even if she emptied it completely, the result would be more embarrassing for her than dangerous for any creature.

As for its usefulness, it is what the princess cannot seem to acquire in the books around her, self-confidence, and especially in relationships. Despite her long-standing friendship with other mares in Ponyville and beyond, Twilight still had a big gap in her behavior towards stallions, and one in particular. Feelings are a very complex thing and the attitudes they can engender are sometimes incomprehensible to all, even to their principal actors. It was this that prompted Twilight to think of a solution to the common problem she encountered when Thunderlane came into her library.

The dark stallion was only one of many in the city for Twilight not so long ago, only Rainbow Dash saying a few times reproachfully about him in weather work and how boastful he could be according to the boastful mare herself. But once these prejudices passed, the pegasus who walked through the doors of her home was very friendly, smiling and taking care of his person, especially his unique hairstyle. But even more protective and caring, he was always towards his little brother Rumble, being his only family and taking care of him as best a big brother could, coming to the library to bring him books at the base. This brought a lot of sympathy from everyone who knew him, and the lavender princess was no exception, only as his visits became more and more daily, the behavior of the two ponies changed somewhat.

Thunderlane was quite the charmer with her, telling her nice anecdotes or funny moments of his life in the Rainbow team or in Ponyville in general, without being too tactile with her, the barrier of Twilight's status probably being the cause. Although they had been friends for a while, the stallion had a hard time not calling the mare by her new title of princess, scratching the back of his head when he made a mistake and looking away. Something Twilight did much more than he did while the pegasus was no different from his beginnings, his new wings often inadvertently contracting for little or no reason than Thunderlane asking for information on a book by turning to her.

Twilight was of course totally inexperienced in this area, but her desire to learn more about the stallion or to extend her visits put her on the trail of the loving feeling new to her. Thunderlane had quickly managed to remain the same in conversation with Twilight as anyone else, but this was not the case with the princess despite the habit that had set in. During a casual discussion about what they were going to do for the upcoming seasonal party, it happened, cheeks getting hotter, eyes twirling in rather unusual areas of the stallion, wings not being able to stay in place and her imagination taking over the rest. She couldn't sleep for a week without seeing him in her dreams everywhere after that moment.

And so the idea of the potion came to him, the specialist in the genre residing not far from the city by chance. A few wise words of advice from Zecora later, without divulging its true purpose and keeping its secrets, Twilight knew what was left to do. Maybe Thunderlane would eventually ask her out on a date, but he'd already had so many opportunities that the mare wondered if he played with her and knew what she was thinking when he was around. For once in her life, she decided that she would take the lead, even if she judged that a concoction never tested before was necessary for that.

It is thus equipped with its most beautiful assortment that she was pacing in her room by remembering her moments with the stallion an umpteenth time. Wearing her bluish shirt sticking perfectly to her slim waist and her round nipples as well as a dark skirt to which it was enough of a blow of tail to reveal her stockings, Twilight did not feel less dressed than usual, just more confident to have made a choice so audacious without artifice.

"I hope he gets here soon, I'll go wait for him downstairs." She decided as if watching her mixture for a few minutes also gave her its effects without having to use it fully. It would be fantastic news if this could happen.

Still in her thoughts, the princess paid no attention and began her descent down the stairs, until the last two steps where she caught her leg in the other, causing her to fall forward. The worst part of it was not the face against the carpet on the floor, but her magic that stopped for a precious second, enough to inadvertently knock over the bottle, shattering on impact.

"Twilight, hey are you okay you're not hurt ?"

Not remembering the newly acquired wings, Twilight groaned painfully as she got up to find two things:

One, the green gas was now free to move, the first of which was to end up in the princess's nostrils at the first sudden movement. It disappeared into the air as quickly as it had escaped from its glass prison.

Two, the door to her library was now open with a dark-coated pegasus stallion rushing over to help her up.

"Thunderlane, what are you..."

"I heard something fall as I was entering but I didn't suspect it would be you, are you okay ?" he asked showing her his hand carefully and a worried face.

"I... yes I'm fine, thank you !" Twilight replied as she accepted his help to get up.

"You broke your bottle though, luckily there was nothing in it !" He then said while pointing to what was left behind.

It is at this moment that the face of the princess took a surprised expression, widening the eyes by knowing or had already passed its concoction. Contaminating the minds of the two ponies now, she could not tell Thunderlane the truth about this accident, she chose to quickly close the door with her magic so as not to be discovered further.

"Yes you're right, it's a shame, I was going to use it, too bad." She replied taking the cutting debris still with her purple magic and threw it into the kitchen garbage can. "Never mind, glad to see you anyway Thunderlane." She regained control of the situation, smiling at him to hide her disgust that the turn of events was totally different from what she had expected.

From now on, anything could happen with the altered minds of the two ponies who had inhaled this mixture in large quantities, one of whom didn't even know he had done it.

"Glad to see you're okay too Twilight, I'm returning the book on the Everfree forest stories, Rumble loved it even though he definitely wants to find out all about it for himself now !" Groaned the poor big brother as he put the book back where he had taken it last week.

As he moved, Twilight approached as usual to assist him in his search for another interesting book for his little brother, bringing her gaze to the muscular back and sturdy wings of the pegasus under his shirt. It had also become a habit, but the next moment when she imagined his multiple curves without his clothing was not, showing that the mixture was already working. Her face became reddish and even burning as she began to mentally undress the stallion, not expecting such quick and precise results on what she wanted. She then swallowed and even bit her lower lip as she thought about what Thunderlane would see when he turned around to ask her about a book, suddenly feeling more vulnerable than she would against anyone else.

"Otherwise, is everything okay with you ? Except for the incident earlier I mean." He engaged the discussion with a small laugh that sent shivers down the mare's spine, searching the same radius at the same time.

The princess's wings burst in seconds as she gained her maximum wingspan, forming a shadow that Thunderlane noticed on the books. He turned around and saw Twilight covering her chest with one hand and her stockings with the other, a strange thing because she always wore her clothes well. He also noticed her face burning and her legs retracting against each other, which really scared the stallion of his state.

"Twilight, what's wrong with you..." he began to ask before his vision altered in turn during a blink of the eye, seeing more and more of the princess's body, without her private parts still cleverly camouflaged earlier. The face and the wings taking the same appearance as Twilight, this one understood that she was not the only one to be affected by her decidedly powerful creation.

Feeling a slight dizziness take her, unless it is the new audacity she gained thanks to her fall, she let herself advance to the stallion who had not hidden his penis below, although it was actually already hidden. She finished her steps by bringing her hands against the torso, or the T-shirt, of Thunderlane, without breaking the embarrassed look and filled with doubt that they threw themselves. Without a word, she gently rubbed what she thought was her silky soft skin, as the stallion's free hands began to follow her call and ramble near and around her.

"Twilight, I..." he wanted to continue, but his lips were suddenly sealed by those of the princess who had closed her eyes in the act, leaving her peaceful face in view. Although surprised at first, Thunderlane quickly took a liking to the sudden affection she was showing him, finally bringing her hands around his body, caressing his wings as well as their base which was resuming their place behind Twilight.

The kiss deepened during this period, each of the two lips exploring with the same burning desire that of the other, without wanting to dominate or play, it was a true harmonious dance that was carried out between them. Twilight's hands took possession of the stallion's neck to bring their faces even closer together while feeling the activity inside when touched. Thunderlane's wings ended up like Twilight's, in their place, as long as the evidence of affection continued.

If the potion could have worked from the beginning, Twilight would have used it sooner. She could only be sure that the dark stallion enjoyed the moment as much as she did, artifice or not. It was enough to feel his hands gripping and caressing every part of her back and hips to realize it, not to mention his accompanying tongue. The heart of the alicorn began to beat furiously when with what was certainly going to follow soon, without speaking that their relation will never be the same one after this visit.

But Thunderlane must have been thinking the same thing because he started to move a few steps without stopping their session, until he reached the large round table in the center of the room, before bending a little more. He had to put one hand on the table while grabbing the back of the princess with the other and Twilight wrapped both her arms around his neck not to fall backwards, but it also brought their contact closer to their faces, continuing to kiss with passion.

Feeling the affectionate caresses that the stallion gave to the back of the mare, she let go of her legs to let Thunderlane's movements free, which followed to confirm it. Within seconds, the librarian found herself lying on the empty table with her lover on top, only her legs were still in the air as she raised one as if to warn him of her lack. Thunderlane readily responded by grabbing her soft thigh and bringing her over two ponies, making the part of the short skirt that was supposed to hide her private parts more and more laughable. She did not seem to care any more especially when her lips were stuck to his and that her hands played with the tempting hairstyle of the stallion.

He wasn't putting all his weight on her out of chivalry, but Twilight was sure that his chest, which tended to each passing action, would keep her safe, the other hand of the pegasus mimicking hers by caressing her mane. The mare's second leg rose to mimic the first and wanting to wrap itself around the stallion's waist, which he didn't let go when he saw why she was calling him down. He took it in a movement mirroring his other leg and was able to move away from the kiss that lasted for a long time, a lot of saliva was exchanged between the two.

"Wow Twilight ! You're amazing !" He replied with a light slap to her bare buttocks under her skirt, which brought a hot breath in response from the princess, everything screamed for attention in her body from her expression to her reactions, and even her mind wanted it.

"Thunderlane I love you, if you agree you can fill me up, I want it to be you now !" She replied as she wriggled her more massive thighs than ever around the stallion's waist, wanting to massage and get a glimpse of his parts. Her heat was so great that she wanted to be contagious in making him as horny as she was, a great challenge taking into account that Twilight would probably never say that.

"I don't know why I waited so long for this." He admitted as he kissed the princess full on the mouth one last time to soak in her burning cheeks before stepping aside and letting go of a single one of her thighs. He began by removing his pants and his boxer which did not hide any more much considering the circumference which had taken his other stud thinking the session of kisses and let them fall around his legs. Twilight was finally seeing a stud's sex at full throttle and it was impressive enough to lure her in even more than before, finding it a shame that her potion probably had something to do with it.

Thunderlane grabbed his cock and toyed with rubbing the tip against the princess's black panties, driving it into her pussy and soaking her more than enough to know she was ready.

"Please, I can't wait any longer." Twilight demanded as she wrapped both of her purple legs around the pegasus and pulled her even closer, though there was still the princess' underwear as the only obstacle to their mutual pleasure. Obstacle that Thunderlane was more than euphoric to move with two fingers before pushing them in the vagina of Twilight and taking them out just after. The result proved conclusive with the juice that covered them, he aligned his member and pushed his tip inside, the alicorn moaning with happiness at what she had been dreaming of for weeks, and taking her thigh as the other and beginning his movements.

"OH FUCK YES, THAT'S GREAT !" She exclaimed in delight as she kept eye contact with Thunderlane, making him more confident to pound her with more force and ever deeper as his balls slammed against her delicious ass. Twilight's hands on the cold desk in comparison found his neck again and didn't let go of the stallion, bringing his face into her still covered breasts. Still tightening her thighs on Thunderlane's waist, she continued to verbally express her joy during the thrusts and thrusts of the black cock that filled her as desired.

The hot breaths of Thunderlane's nostrils against Twilight's nipples only brought more life into their already hectic romp, the table remaining stationary and not creaking to give way and their shared moans filling the room. Eyes closed to focus on their single task making them more efficient, they found no words to express themselves on the turn of events, only the moment was paramount as Twilight slid slightly with each push to return to her original place on the table when Thunderlane's cock brought her back like a sucker.

A few minutes passed with this pattern, until Thunderlane's hands lowered in their journey over the princess's erogenous zones, finding just below her cock her tight asshole. It would be quite an adventure to get in there especially given the current state of things, and the state of Twilight in particular. Pushing the same finger soaked in her pussy juices earlier inside without stopping his care for her cock hungry pussy, the response was immediate, a most inviting moan gave him free rein to his desires. He had to ask or he would regret it for the rest of his life.

"Twilight, may I take you by your ass ?" He found the strength to verbally express his request, even though putting a finger in that area was already an obvious appeal. Seeing that he wouldn't get a response if he continued to fervently fuck her pussy, he slowed down instead of stopping abruptly as he thought he would, he too needing more excitement.

One last ragged breath and eye contact followed.

"As long as I have you inside me and you're making love to me I'm fine with it. SO DO IT !" She replied fiercely as his black cock still filled her but was no longer moving. Thunderlane took charge of releasing herself and feeling the warmth of the surrounding air with her member, even though she already missed Twilight's insides.

Moving the purple princess' legs against his torso and up to the stallion's shoulders, it gave her a perfect angle to impale him with her now wet shaft for easier access. The gleam of impatience in his eyes was the ultimate confirmation for Thunderlane to insert himself inside her back hole to fill it again, and him as well.

The first few inches were nerve-wracking even in the state of the two ponies wanting only to satisfy each other, Twilight moaned in surprise at this new sensation but prayed that he would continue. The stallion's hieratic movements eventually found their intense rhythm, giving everyone their fair share of audible moans in the terribly hot library outside the Celestia sun. Thunderlane's strong hands took position on her bulging sides on the table to give better support to her thrusts and stimulating her stars for cute marks, Twilight's started to caress her breasts under her sky blue shirt, she was too far to reach the stallion. Finally, the shapely balls of the stallion wedged with each come against the buttocks of the generous alicorn, knowing that she would not remain so big a long time.

The panting never stopped as did the efforts of each to resist the urge to release everything the last few moments had given them. Their bodies were crying out for release, but they would hold on, if only for another minute or two. While eye contact was still made, one way to hold on was through speech.

"Since when did you want it to come to this ?" Thunderlane asked first, it was Twilight who had started things by kissing her first after all.

"About a month, I still remember you thinking you gave me the feather flu because of my wings not retracting anymore." She managed to let out a light laugh before returning to her happy moans as she smiled looking at him. "What about you, would you have tried anything ?"

"I honestly don't know, you are a princess after all so I thought you had too much work to think about a stupid stud like me, especially since you aren't known for your ease at this even before you became a princess." He replied as he felt a blush come over him in both pride and amusement, returning her loving gaze.

"I'm still a mare, and no matter what you think, I really needed this to come out everything I had in me."

"Speaking of getting out, I think it's time for both of us." He laughed out loud at her pun as he forced to the maximum of his ability to plow through her back field which clamped his cock inside, she would never let go until she was through. This was made more obvious by the actual screams that her mouth was letting out.

"OH THUNDERLANE, I LOVE YOU !!!" She let go as she spread her legs to tip him over and bring him back to his first position on top of her, bringing her arms back behind her head and resuming their deep kiss with fury.

Thunderlane only responded with ever more exaggerated thrusts around her soft ass, her arms encircling the sky blue shirt as well as the princess's mane, further deepening their dance with their tongues. The moans passing from one mouth to the other and the air that released their muzzles reflected between them, even their eyes burning with desire sent the same message.

Go for it!

And they came, one directly into the back of the mare, the other coming quickly out, splashing their two crotches. Already overfilled for her first time, Thunderlane's cum flowed out of Twilight's ass to follow her round line to the end of the table that had endured it all without squeaking once. Cumming at the same time made them exchange their best gasps in each other's mouths, wondering if such a thing could be reproduced again.

After the ecstasy came the rest, staying in the same position on top of each other in the warmth, their arms lovingly wrapped around each other to keep their partner close. An identifiable smile of peace on them and messy bodies, manes and clothes required some care to become acceptable in public again. And speaking of public...

"That was exactly what I had wanted all this time Thunderlane, thank you." She said as she rested her muzzle next to his cheek, sniffing his scent that left no room for questions.

"It has been an immense pleasure serving my princess, let's do it again anytime." He chimed in as he began to climb out of her loose ass, leaving his stud after his services.

"You want us to get together then ?"

"The last half hour hasn't answered that question in your opinion ?"