Spike couldn’t believe the position he found himself in. His cousin, a princess and a teenager, was requesting lessons on one of the most deviant, whispered topics in Equestria. Something that apparently even her mother, the princess of love, never told her about. Although now that he knew the kinds of novels she apparently kept in the crystal palace, he had doubts that Cadence knew about sex before she and Shining Armor were engaged.

The filly sitting on the bed, on the other hand, had no idea the extent of her own request. Mommy’s novels had all been so direct and distinct. She wouldn’t pretend to know if that’s all of it, or if what she learned had even been accurate beyond the feeling of her hoof between her hind legs.

“Where should we start?” Flurry’s words rattled in Spike's head as he tried to formulate a response while simultaneously being tempted by his cousin. Her lurid scent filled the train car, mixing with the slight odor of Spike’s dragon musk, blending in to a deliciously erotic blend that kept him more and more aroused. He had to cover his crotch not to let Flurry see, but he knew she was more interested in that part of him than any other right now.

“Well, uhhh…” Spike stuttered as he thought back to what Twilight had taught him. What was it twilight told him when he was just learning about himself. “Sex is many things to many people. For some it’s just an act that leads to baby-making, while for others it’s akin to a hobby or a pastime, since it can feel really good.” Spike slowly says, trying not to meet Flurry’s gaze while recounting exactly what Twilight said to him during their first ‘talk’.

“Baby-making? Wait, sex leads to babies? That’s where babies come from?”

“You know, I’m really starting to question your education. You were taught by royal tutors right?”

Flurry brushes off her apparent lack of knowledge as she lets her hooves wander her body, her eyes transfixed on Spike's crotch, where he used his claws to cover up the region she was so eager to expose. “You mean Sunburst? He was a magic teacher. I never had a sex teacher before.” Flurry brings her hoof to her lips, licking a bit of natural lubrication off of them while smiling at her cousin. “But now I have you, Spike.”

Spike couldn’t help but blush as she expressed what the two had become in such a short time. Partners, and teacher and student. More than what he thought any cousin should be. “Hehe, yeah. Now you have me.” He let his eyes wander up the filly’s body, taking in her subtle curves and delicious looking rear before pulling himself back away, staring at the ground. “Okay so sex.”

“Yes. Sex.” Flurry repeats back to him while dragging her hoof up and down her delicate slit. “Teach me all about sex. Teach me what those books couldn’t Spike.”

Spike could feel his options running out. Time slowed as he came closer and closer to having to explain to his cousin what it was. But then an idea for another delay came to mind. “Why don’t you tell me what you already know, so I don’t need to repeat anything.”

Flurry rolled her eyes as she could tell spike was just avoiding the topic at this point. She could tell that this wasn’t very comfortable for her cousin, but this would be the best chance she had to properly learn, and likely vital to whatever mission she was sent on. Slowly, the filly climbed off the bed and began to make her way towards the dragon, letting her tail flag and her hips sway as she approached. “Well, sex is something fun and intimate. It should be done between people who love eachother very much. You love me, right cousin Spike?”

“O-of course I do.” Spike quickly responds, Finally meeting Flurry’s eyes after so long avoiding it.

“Good. I know that it’s between a mare and a stallion, where a stallion puts his penis inside her vagina. I know that it’s private. I know that reading about it sends tingles all over my body. I know that I want nothing more right now than for you to ‘teach’ me.” she winks at the dragon, causing Spike to break eye contact and look back towards the ground.

“O-Okay. Well then, uh. Let’s start with something you said.” Flurry gets really excited before Spike can continue. “It can be between more than just a mare and a stallion. Mares can do it with mares, and stallions with stallions-”

“Have you ever been with a stallion?” Flurry interjects.

“I uh- I don’t think I should answer that.”

“Oh my gosh. You have. That’s so hot. You need to tell me who it was. I want to know everything.”

“This isn’t about my personal life. This is about teaching you.” Spike says forcefully, pushing past his nerves and hesitation, standing up as he scolds the filly in front of him.

But in doing so, the drake stands up and accidentally lets his cock flop out from behind his cover. Flurry did everything she could to take it in for that moment, searing the sharp shape in to her mind, the pointed tip, the slick long shaft with ribs along the underside, the bulbous growth at the bottom and the small soft fleshy spikes along the base that looked like they would tickle her more than hurt. She quickly lunged for Spike’s crotch, burying her snout between his legs, taking in the strange musky scent that made her legs shake. The feel of soft flesh against her face, the way that it twitched from her touch and the bulb seemed to pulse in size with his heart beat. It was more than anything she could imagine, more than she had ever hoped it would be, and what it was meant for was her royal duty.

Spike panicked when he felt the filly pressed up to him, and quickly reached down to grab the pink menace before she could do anything more. Just as she opened her mouth to get a taste of Spike’s delicious looking dick, she was lifted up and brought face to face with her new teacher.

“What are you doing?!” He shouted in surprise as the thought of her body caused his cock to keep twitching against her hind legs.

Flurry just stuck out her tongue and began to rub the cock between her, not quite able to grind her pussy against it but desperate to do so. “Pussy.”

“Oh, now you know dirty words all of a sudden, princess?” Spike gasps, infuriated by the filly princess. “Is this all a joke to you? Sex is serious. It’s a big deal. It’s-”

“A hobby. A pleasure. You said it yourself. And your penis clearly wants it too if it’s so stiff.”

This was her plan. This had to be her plan. Spike thought as he realized exactly what she was doing. Pushing his buttons, acting like a little brat. More bratty than the crusaders, even more than Trixie when starlight invited him into a threesome. She pushed his buttons and got what she wanted.

And he wasn’t strong enough to deny her.

Flurry was just being a prick, not sure what her intentions were, mostly acting on curiosity and lust. But to her delight, she was getting the desired result.

“Just, let go of my cock, and I promise I’ll be the best teacher you’ve ever had.”

With an evil glint in her eyes, Flurry smiled at her cousin. “Make me.”

***

The palace was quiet, the guards dismissed for the evening and the doors closed to the public. The remains of various desserts and sweets lay scattered about the grand dining hall, but there was no one to be found. Only a faint trail of crumbs and mysterious clear fluid drops leading back to the royal bedroom, where two princesses made a lucky stallion’s dreams come true.

The pure white Stallion was buried deep inside his little sister’s rear end while his wife, the princess of love, showered him with kisses and affection. She ran her hooves over her husband's chest, kissing his neck while his little sister screamed in bliss.

Twilight’s pussy convulsed and quaked as she felt overwhelmed by her brother’s fat cock. “YES! Big Brother Best Friend Forever fuck me HARDER! Fuck, I’m close. I’m so close.”

Shining reared back and with a final powerful thrust, he could feel himself flaring inside his sister. He was getting close to his limit while his sister shouted her love for her brother to the heavens.

Cadence reached around and gave her sister-in-law a spank as she was sent over her limit, her legs giving out and collapsing onto the royal sheets. Her brother wasn’t far behind, being sent in to overdrive feeling his sister’s body clamping down on him. With a few more bucks, Shining let loose a torrent of his seed deep inside his sister. With a few loud grunts, he collapsed down on his sister.

“Ugh, ugh, Twily, you dirty filly. You should have told me to do this earlier.” Shining breathlessly told his sister while pressing down on her, wrapping her in a hug.

Twilight was too exhausted to do what she truly wanted, to lean back and kiss her brother more passionately than ever before, but had to settle for just a few lazy mumbles.

Cadence did what twilight couldn’t, stepping up to her husband and kissing him. “And you wanted to keep us from having our fun.”

Shining chuckled as he kissed her back, their tongues dancing as the two stand over the their relative, clearly not as full as stamina as the couple that regularly fucked like bunnies for hours at a time. Still, as they parted lips, shining couldn’t help but worry for his daughter. “I hope Flurry is doing alright. I still don’t like…”

“Nuh uh, no Flurry talk tonight. She’s doing fine, I can promise Spike is protecting her. Nothing is gonna happen to her under his watch.” Cadence cut off her husband while she levitated a bottle of whipped cream over to her. “Come on. I’ve got a special dessert just for you, you just need to put on the glaze.”

***

Spike tossed the filly on to the fancy royal bed, eliciting a small giggle out of his cousin. “Oh, is that all you got? The big scawy dwagon throwing around his princess? Is that what sex is spike?”

“God, what’s gotten into you?”

“Clearly not you. I thought you were gonna teach me.”

Spike was steaming, smoke flaring from his nostrils as he looked at the girl before him. He thought she was innocent. He thought she was genuine. Maybe she knew what she was up to already, and just lied about it all.

As Spike’s train of thought spiraled out of control, Flurry seized the opportunity. She rolled over and spread her legs, lifting her tail up to fully expose herself. Her plush flank, fit for a queen. Her puckered ponut staring back. Her dripping cunt desperate for her cousin. She looked back over her body, catching Spike’s eyes just after they caught a glimpse at her nethers. “What? Scared? Or maybe you just don’t know what sex is either.”

Any string holding spike’s lustful rage back snapped as he watched his bratty cousin make allegation after allegation. A small bout of flame shot from his mouth as he loomed over Flurry, cock standing taller and harder than ever before.

“You want to be a bitch, you’re gonna get punished, ‘princess’” He spit out his final word as he grabbed Flurry’s front legs and pinned her to the bed. “I know what sex is. I’ve had orgies, I’ve fucked half the elements of harmony. I-”

“But you can’t even fuck a little filly desperate to learn. How pathetic.” Despite her cruel words, she stuck her tongue out at her companion. Spike was harmless. He may be a dragon, one of the fiercest enemies to the ponies for centuries, but he was just Spike. She know he wouldn’t harm her.

Spike grit his teeth as he growled, more heat growing in his throat, and between his legs. “Pathetic? Me? You’re the goddamn princess of sex and you don’t know the first thing about what you represent. You’re a virgin. You’re nothing. Until now.”

Spike quickly lined up his narrow tip with his cousin’s cunt, teasing at first, testing the waters. Flurry was sopping, lubed up just for him. He released one of her arms so he could cover her mouth, not wanting to hear another thing from her smart mouth. With a moment’s hesitation, the weight of everything he was doing catching up to him, he pushed it out of his mind and forced himself as deep as he could into the little filly.

Even though he covered her mouth, the scream that came from her seemed to shake the train. Maybe even the world. A few drops of blood leaked from her freshly deflowered pussy as tears welled in her eyes. Her eyes rolled back, and her body pitifully accepted Spike's pulsing knot.

That scream pulled them both back to reality. Spike was all too aware about what he did. This may be a crime greater than anything his previous enemies had done. Chrysalis impersonating cadence may come close but he just defiled a princess. A filly princess. His cousin, the princess of who even knew. Was this all a lie?

He pulled back, yanking the knot out of her cunt and releasing his captive. “Oh- Oh my gosh Flurry. I’m so sorry. I just got so heated and-”

“Shut… up.” Flurry choked out through pained gasps, but a smile was on her face. “That felt… holy hooves, I… Why the fuck did you pull out?”

“I-it’s just that-”

“When you do anything for a princess, you don’t stop until she says stop. And I didn’t say stop, did I?”

“Well, you just.”

“Shut up. Shut up and sex me you dummy.” Her tail kept flagging, her body shaking as she was desperate for more. The swift feeling of that ribbed underside, the sudden stretching from his knot, the way those spikes tickled her love button. She needed more.

“I just- maybe we should-”

“No should, Only sex. Or were you lying about knowing about sex? What was that about doing it with the elements? Was that a lie too?”

Spike was able to restrain himself from giving in to Flurry’s taunts, but now he knew exactly what she wanted. He flared his nostrils and forced smoke to billow out. “Lying? I’m the liar? I’ll show you what this liar can do.”

He gripped her arms once again, but just a tad bit gentler. His other claw slipped down from her mouth to grasp her neck as he pulled her light body up. Flurry was still smiling, feeling his shaft press against her opening again and feeling his dominance, his control over her. She batted the dragon with her tail, shooting just a tad bit of marecum on to the dragon.

“Show me, dragon.”

Spike practically dropped her on to his shaft, letting gravity pull the princess once again to the base of his cock. She let out another delighted shout as Spike grunted, trying to pull his cock back out of her just to thrust in again. Flurry went limp in his arms, giving herself over to the pleasure she felt.

Spike lifted her up off the bed to fuck her standing up, pulling her in close to his body as he pistoned in and out of her royal body. He tightened his grip on the filly’s throat, only sending her deeper into bliss.

Flurry struggled to keep breathing as the dragon shut her throat, but in this moment she barely cared. She was in heaven, feeling something even better than what she had dreamed of. This was what she had been missing? Why weren’t people doing this all the time? Why wasn’t this as common as saying hello to someone. There certainly were some guards she wouldn’t mind exploring if this was how amazing it felt. Maybe a future law…

Thousands of thoughts crashed down with each thrust, her mind resetting as her fillyhood struggled to accommodate Spike’s draconic member. Every time she would have a new idea, new desire for when she would one day become the ruler of the crystal empire, Spike would slam back in to her body, kissing her womb and sending wave after wave of pleasure all over the filly’s body.

Spike was being rough, more rough than what he thought capable. Even more rough than he was with Fluttershy, the closet masochist who wanted to feel like a dragon’s prize. Flurry was in his hands, he controlled her. She wanted him, and he wanted her.

Flurry gently nuzzled back into the crook of his neck, escaping his grasp for just long enough for her to quickly say, “You’re my favourite cousin. Don’t hold back.” Her praise was quickly followed by a series of incredibly lewd moans as Spike raced to grasp her throat again.

Spike humped his cousin until he could barely feel his legs anymore, struggling to keep holding them both up for so long. It was hard to tell just how long, seconds, minutes, maybe even hours passed as Spike slammed his meat inside the little filly, all too happy to see his cousin getting destroyed by his own doing. But it had to come to an end.

Their sensual position had to shift as Spike's legs tired. He still held Flurry close to him, loving the feeling of her softer than silk fur against his scales, but still collapsed on to the bed all the same.

His carnal rutting of his royal cousin didn’t stop. He wasn’t sure it could stop now. Flurry didn’t care though.

Flurry was having the time of her life, her mind melting with pleasure as she pressed her body back against her teacher. She humped her filly rear against Spike’s mature dragon hips, dragging her clit along the pleasurable spines. Each time, she tried to let out a moan, trying to let spike know how much she loved this, loved him, but with little success as she struggled to breath. Her body acted on autopilot, fulfilling whatever duties it felt was right.

And right it felt. Flurry couldn’t put into words how right this felt to her, not that her brain was able to think of much at the moment. It was like the most beautiful night sky meeting the most relaxing night out. Better than anything she had ever done by herself, and leagues ahead of those long days spent shadowing her mommy while she worked. It was rough, it was mean, and it was exhilarating.

Spike took note of the vacantly pleased look on her face, getting the small glances he could from the full body mirror beside the bed. This looked so wrong, a dragon using a filly’s body as his own personal plaything, but she was loving it.

He took his lesson another step further. Though he feared she wasn’t ready for what he considered the best experience, there was still another trick he knew. Something that he learned when with the unicorn Belle sisters. As spike slowed down his thrusts, keeping a steady pace, he slowly leaned down and gently gripped the Alicorn’s horn with his teeth and began to lick from base to tip.

The feeling was electric. Waves of euphoria shot through Flurry’s body as she began to spasm. Harmless ephemeral sparks shot from her horn as her cunt twitched and squeezed. Her body went limp, then stiff, then limp again as she melted into Spike’s perfect handling of her body.

However, in the heat of the moment, she let her magic go a little bit too far. Maybe it was instinct, she couldn’t tell. She cast a spell she never learned, bathing the room in a bright pink moments before she reached her pinnacle. The magic coated the room, before shrinking to just the two of them, joining the two in some sort of magical bond.

Flurry felt no different, her mind was already wracked with pleasure and barely even noticed the fading pink glow. Spike did notice it though. Power. Raw power, similar to Twilight when she was still learning. But this was nowhere close to the simple magics Twilight did.

Spike could feel Flurry, more than he had ever felt anyone. He felt every thrust, every shift of his fingers on her throat, and every dig of his claws against her soft belly. He could feel her orgasm coming, and in turn his own surging lust that would soon erupt.

Spike loosened his grip on Flurry’s neck and forcefully rolled her over. The two locked eyes as a magic tether bound them together. With a few slowing thrusts, spike forced himself deeper and deeper in to the filly, pressing the tip of his cock to her womb and begging for entry.

With a final thrust, his knot inflated and shot after shot of his jizz filled the filly. The filly screamed in orgasmic bliss while the dragon let out a loud grunt. Flurry’s boy tightened around spike, pulling him close as she was hit by the orgasm as well. She could feel her pussy squirting, maybe pee, but she didn’t care right now. All that mattered was the two of them.

***

It took some time for the two of them to say anything to each other. Spike had knotted her, locking the two in place for a few minutes as they waited for it to deflate. Spike didn’t want to acknowledge how he lost control more than once, didn’t want to admit that he just took his fourteen year old princess cousin’s Virginity.

Flurry wanted to talk, wanted to ask so many questions and beg for another round, but she had already done so much tonight. She felt a bit bad for being so mean, but wow did she not regret it at all. If that’s all it took, and that’s how good it felt, why wasn’t everyone doing this all the time.

As time passed and the two held each other, pressing scale to fur, Spike noticed something. That power that flurry unleashed lingered. The glow was gone, but the magic remained. Something about them changed.

Finally, as spike could feel himself deflating and was about to wriggle himself free, he broke the silence. “Soooo… I guess that’s your sex lesson.”

Flurry seized the opportunity to finally say what was eating her up inside. “Oh my gosh, that was amazing. You were amazing. Spike, that might have been the best thing I’ve ever done. No, it is the best thing I’ve ever done. I love you Spike, thank you thank you thank you.”

“Easy, easy Flurry.” Spike tried to calm the incredibly excited filly with no success. “Your final lesson is this. Sex is special. It’s something very exclusive. It means a lot to most people. Okay?”

Flurry’s big grin melted as Spike’s words set in. Spike was just about to repeat himself when flurry spoke, with a distinctly deflated tone. “Final?”

Spike wiggled his hips as he pulled the knot, inflated to thrice it’s normal size but shrinking, free from her tight nethers. “Final. End of story. I really don’t want to be the one to say this, but what we did was wrong.”

“How can something that felt so right be wrong?” Flurry complained, huffing as she pulled away from Spike. “There has to be way more than just that to learn about sex. What about uh…” Flurry quickly tried to remember what they had talked about before, struggling against her lusty brain to come up with anything. “Sex with other guys. You said you’ve done that before. What’s that like? It’s not like guys also have a vagina.”

Spike sighed as he realized what this meant for him. He lay down on the bed next to Flurry, his shaft retreating into his sheath while he pulled the blankets aside. “Maybe we can talk about that in the morning. Sex is normally pretty tiring.”

“But Spiiiiiike. I’m not tired at all. I’m more fired up than ever.”

“Shhh. It’s fine Flurry. We have another day until we reach Yakland.” Spike pulled his cousin close to him, cuddling her as he let his eyes close.

Flurry huffed but eventually wrapped a wing around Spike, then a hoof, then nuzzled her cheek against his chest. “All right. But you already agreed. No takesies backsies.”

“Pinkie promise baby. Pinkie promise.”

Spike was already starting to drift off, barely paying attention as he little alicorn stretched up and kissed his cheek. “I love you Spike.” She whispered before returning to his chest and cuddling herself to sleep.”

Author's Note

The adventure continues, and the lessons begin. I'm gonna be mixing plot with porn in the future, this was just to get those horny writing juices flowing. Quick and Dirty. Hope you enjoy

Also, feel free to point out any "flurry doesn't understand sex" plot holes. I wasn't the most consistent with her understanding, so criticism of that is fair, and I will try to fix it if pointed out.