With the light in her horn disappearing, Princess Luna returns from the dream world and returns to the castle. Usually, her job would require a lot of work to prevent some poor ponies having nightmares and worse things. However, there's not too many of them lately. In fact, she's still quite awake even after her shift, whereas she usually would carry eye bags. The sun had already appeared from the horizon, that means Celestia would meet her at the dining room. Hopefully she got those lovely pancakes ready for her.
Opening the large door to the dining room, Luna sees Princess Celestia on one side, already munching some of her pancakes, while another plate of them are on the other side of the long table. The white alicorn is quick to notice her sister's presence. "Good morning, dear sister! I've prepared breakfast for you."
Luna silently nodded. Ever since that cutie mark switching incident, Luna would try not to miss the chance to spend time with Celestia, unless she's really tired. Because both of them need to do so many things, and have a significantly different sleep time, they value their sister bonds more then ever now. Going over to her seat, Luna notices that Celestia's pancakes have oranges and pineapples arranged like the sun on top of the pancake.
"A motif of the sun... What is this? A hidden message about you, Celestia?" Luna called out jokingly. Like other siblings, Celestia and Luna have a bit of a rivalry going on between them. One of them is about how much influence they have in Equestria, who is the better and more known princess, and such.
Princess Celestia chuckled, getting another chunk of her pancake with her fork. "We all know what they say, Luna. Praise the sun." Celestia smiled before she get another mouthful of her breakfast.
Not going to let the chance to have some friendly banter with her sister, Luna presses on. "How ironic that you say that while we're currently eating the sun." Luna drives her joke home by taking a chunk of her pancake, making sure to get the sun motif, and eats it.
"At least everypony likes it." Celestia waves her hoof dismissively, before she takes another chunk of pancake into her mouth.
"Hah, I'm pretty sure ponies love to see the moon more." Luna continues. "You are not supposed to stare at the sun, while you can see the moon all night long."
"Oh, really? Remind me how many ponies decides to sleep when the moon is raised?" Celestia leans a bit forward, giving Luna the most annoying face she can give, eyes squinted with a smug smile. She knows that Luna actually likes doing something like this more and won't take it to heart. Luna actually chuckled at her face. Knowing that she's beaten, Luna decides to stay silent and finish her pancake instead.
Seeing that she had won, Celestia decides to do what other siblings do when they won against their younger sister: Gloat. "Praise Princess Celestia. The better and stronger Princess of Equestria." She dramatically raised a hoof to the air. This catches Luna's interest, not the hoof, but what she just said.
"Stronger? We haven't determined that you're stronger then me, sister." Luna said confidently. Despite their rivalry, neither princess rarely talk about which of them is stronger, for some reason. They only did once, and it was princess Celestia that came on top, which the white alicorn wastes no time reminding her sister about it.
"I think you forgot whose shield buckled under my simple spell. Should we try that again?" The princess of the sun smirks. Unlike her former student, princess Celestia very rarely shown any of her magic prowess other then raising the sun, and compared to her sister, doesn't really care much about her magical abilities. But that doesn't mean she's not powerful. During one magic sparring she did with Luna, a simple magic beam from her horn is capable to leave a dent on Luna's shield, even when Luna is the one who often trains herself.
However, Luna doesn't seem to be worried. Taking another fork full of pancakes, she surprisingly doesn't deny Celestia's statement. "Yes, you are superior in strength. However, I'm talking about something else."
"Do tell." Celestia eats the last bit of her pancake as she hears Luna explain. The dark blue alicorn spends some time chewing on her food before explaining.
"Physical and magical strength are important, as you know. But what about psychological strength?" Luna smirks, stabbing her last bit of pancake before continuing. "I dare say I thrive on that end because of the dream world, but yours might be questionable, sister."
Celestia takes a moment to digest Luna's accuse, before returning her smirk. This seems like a challenge, one that the white alicorn is happy to accept if it means triumph awaits her over her little sister. "Is that a challenge, Luna? You sounded like you are going to test me on that."
Luna was just finished chewing through her pancake. "You read my mind, Celestia. If you're so sure that you can prove me wrong, I can show you in the dream world."
Contrary to popular belief, Luna isn't the only one who are able to enter the dream world. It is accessible via an advanced spell, but the one in charge will still be the princess of the moon, who will have full control of it. Princess Celestia is one of the few ponies capable of entering the dream world, but haven't really did so because of how busy she is. Speaking as siblings, it will be tough to complete whatever challenge set by Luna in her own turf, but accomplish that, and Celestia will prove who's the better princess once and for all. Such opportunity is something she simply cannot miss, and the timing can't get any better.
"If I remember correctly, I should have some free time in the evening because of a postponed event, so I can get some rest before our little... activity." Celestia stood up and collects both empty plates to be cleaned later. "Shall I join you after the moon is raised?"
"That would be the most perfect timing." Luna declared. "If there is no nightmare emergency, which I highly doubt will happen during this time, we may proceed. Now, excuse me, but I'll need to get some rest for the day."
Luna got up from her seat, and was about to merrily trot to her room, when a cough from Celestia caught her attention. Her sister is walking to the other door herself, but she points at the table, where the two plates still reside. This makes Luna look around the room... wait, where are the maids?
"If you would be so kind, Luna. I told the maids they can have a break from the dishes of our breakfast." Celestia giggled, and flees out of the room, leaving Luna behind. The princess of the moon frowned, but a small smile crept up at the corner of her lips. It may be a set up, but she understands that Celestia still got a lot to do today. Besides, if her plan works well, she'll get back on her sister in the dream world tonight
Luna levitates the dirty plates and goes to the nearby kitchen. "Just you wait, dear sister..."
In the same dining room, but at a different time, both Celestia and Luna reenters the room, this time for dinner. Celestia herself just woke up from her evening rest, something she rarely get from her busy schedule. Luna, meanwhile, is about to raise the moon and start her duties, if any. Unlike Celestia, Luna doesn't have a strict schedule, but there's no telling what she'll encounter in the dream world. She can be very busy, have nothing to do, or somewhere in between. Right now, she hope there's nopony having a nightmare that needs fixing, or worse.
Luna notices that the castle's chefs have prepared her a nice looking apple pie, possibly provided by the Apple family. She sat down her chair, as Celestia does the same on the opposite side. "I hope you haven't walked out from our deal, sister?"
Celestia levitates her pie, ready to take a bite of it. "Of course I haven't Luna, what do you take me for?" She said with a confident smile.
"Excellent! I'm going to the dream world right away after I raise the moon. Join me when you're ready, sister!" Luna dramatically chomps down on her pie, slightly smearing her muzzle with it's filling, making Princess Celestia chuckle. The white alicorn choose to eat her pie more slowly. Princesses needs to keep themselves look proper, after all, something she hopes that Luna will pay more attention to. Meanwhile, Princess Luna is eating her pie at light speed. It seems she's very eager to their little challenge.
Realizing that Luna had almost finished her pie, Celestia is still having her dinner. "I'll have the spell ready, you can go ahead first." She said calmly.
The scroll where the spell to enter the dream world is in possession of Princess Celestia somewhere, but even for an alicorn like her, it will take some time to prepare. She should be ready once Luna had raised the moon, and monitor the initial condition of the dream world. After munching the last of her pie, Princess Luna bolted out of the room in a hurry, namely for her to do her duties, and to avoid more extra tasks.
Shouting as she ran away from the room, Princess Celestia can still hear Luna's voice from outside. "You're doing the dishes this time, Celestia! It's only fair!"
The alicorn chuckled. There's no way she'll give the maids a break when she knows Luna will do this to her.
The skies of Equestria darkens as night time falls. The stars and the moon, recently raised by Princess Luna, now brightens the sky. Almost as soon as she raised the moon, the alicorn quickly enters the dream world like she usually does. She did a quick scan of the state of the dream world, usually a nightmare would stick out like a sore thumb.
"Twilight is marrying a book... Flurry Heart is being a DJ again... Lyra is with... whatever that pink skinned creature is..." Like she said, there's no significant nightmares lately. The little ones can usually be solved by their own. Perfect, the night is all set for her and Celestia. "Excellent! I'll make sure Celestia doesn't stand a chance against me here!"
Her horn glowing bright, Princess Luna starts to work. Her magic is not as strong as her sister, but her control of her dimension is literally unmatched. She can almost make anything happen here, not too far from what Discord can do in the real world. She made a dome of magic, isolating her, and soon Celestia when she comes here, from all the vision of the dreams of countless ponies. She plans to let only let Celestia see specific ones, those that are dreams from the past...
Princess Celestia read the scroll for the third time, making sure it's the right one. Interdimentional travel always have a risk of being transported to the wrong place even if you miscast the spell slightly. After going through the spell again and again, the alicorn is sure this is the right one that will take her to Luna's dream world. Alone in her room, the alicorn uses a chalk to draw the rune on the floor around her. The spell is so advanced, that even an alicorn would need them.
After she's done drawing, Princess Celestia closes her eyes and lit up her horn. The rune under her turns dark blue, which in turn momentarily changes her magic to the same color. A few seconds later, a flash, and the princess is no longer in her room.
When she opens her eye, it looks like she's in a room, with all the walls, floor, and ceiling colored a dull gray. It's almost impossible to determine which way is up or down, or how big the space is exactly. However, one thing that helps her get her bearings is the sight of Princess Luna, standing not too far in front of her.
"Hail, sister! You have made here safely!" The younger alicorn happily skips to her sibling, who's still a bit confused.
Celestia looked around, this place doesn't reassemble the dream world compared to the last time she was there. "Luna? Is this really your dream world? It looks considerably different." She asks calmly.
When the younger alicorn lights her horn, a swirl of doors with different colors appear and surrounds both alicorns. Each of them looks like a simple wooden doors that most ponies have in their houses. "Worry not! I simply made preparations for our little challenge."
Speaking of the challenge, Celestia never asked what kind of challenge will Luna throw at her. Though, she's pretty confident that she can handle it. This shouldn't be as hard as defending Canterlot from a full invasion of Changelings, right?
"What do you have for me? Sister?" Celestia asked, willing to take any challenges to triumph over her younger sister. Though, it better not be video games. Luna approaches Celestia with a smirk, rubbing one of the white alicorn's hoof with her own.
"It's simple, dear sister. All you have to do, is admit that I am better then you."
Huh, it's pretty weird challenge, and unbelievably simple. That seems easy enough, too easy, that she wonders if this is just a joke from Luna, just to make her waste time going into her dream world. Celestia laughs at her sister because of this. "Oh, Luna. We've went through this since we're fillies. What makes you think I'll say it now?"
It's Luna's turn to smirk. With her magic, one of the doors surrounding them gets closer, an orange colored one. Princess Luna steps aside and places the door next to her, in front of Celestia. "Because, I know what can make you say it."
The door creaks open, blinding light coming from it forces Celestia to shield her eyes until it dims down mere seconds later. When the white alicorn sees what scene awaits her beyond the door, she needs a few seconds to comprehend the ponies she sees beyond that door before recognizing who they are. Then, things get... much warmer.
Sunburst is laying back on a bed, looking really nervous and sweating. Her mother, Stellar Flare, is walking toward him. When she reaches the edge of the bed, she climbs on it slowly, seemingly on purpose. Her eyes are looking at her son... almost sensually. What's happening?
"M-Mom... We don't need to do this..." The male unicorn slightly wiggles his hooves, that's resting on his body. His voice comes out a bit shaky from how nervous he is. Stellar Flare doesn't seem to listen to her son, however, and continues her approach. One of her hoofs then lands between Sunburst's legs.
"Hush, Sunburst. Mommy is going to make you learn about mares~ You're going to have to have a marefriend soon, you know." She said calmly, gently rubbing her hooves on her son's genitals. Sunburst let out a barely audible moan from the stimulation.
"This... Is this really a-alright, mom...? Isn't this is, like... incest?" Sunburst gulped as he continues to watch his own mother stimulating his privates. Despite his reluctance and awkwardness, it does feel kind of good. This is the first time somepony else touches him down there. His stalionhood is surprisingly quick to get up.
After several more seconds of rubbing, Stellar Flare gets closer and strokes his member with her nose. Her lips finds it's way to one of his balls, kissing and lightly licking it while staring at his face.
"Don't worry, when you can get a mare to do this, you don't have to worry about incest anymore." She said in a sultry tone. Her hoof starts moving itself south, touching and rubbing her own lips, which is already a bit wet.
Aghast is probably an understatement of what Princess Celestia is feeling right now. What she is witnessing beyond that door is, undoubtedly, an incest relationship. It's something of a taboo in her mind, as in almost everypony else. But, at the same time, the fact that it's a forbidden love also arouses her. She may be an alicorn that rules over Equestria, but Princess Celestia is not above the need of a normal pony, the need of sexual activities. A spectacle like this or something similar can still arouse her, but perhaps incest can work her up more then usual.
Meanwhile, Luna, who Celestia is not paying attention to, is grinning watching her sister got mesmerized at what she had prepared. She has some knowledge about psychological things, even having a spell or two about it. Little did Celestia know that she had been eying on her dreams as well. Although there's nothing unusual with the alicorn's dreams, which usually involves cakes or desserts, she had been digging into her head with a spell though the dream world, and eventually knows about what arouses her most. She decides to use it to her advantage against her sister. In fact...
While the white alicorn is still distracted, Luna sneaks behind her, and stares right into her sister's flank. Unlike the princess of the sun, Luna doesn't really mind casual sexual activities. This only helps her more with the plan, to force her older sister to admit that Luna is indeed, best princess. She brings a hoof up, and rubs it right between Celestia's rear, causing the older alicorn to jump in surprise.
"L-Luna!!" She looks at her younger sister with a face that's half shocked, and half irritated. "What do you think you're doing!?"
Heh, she reacted exactly how I thought she'll be, Luna thought. There's no question that Princess Celestia is aroused from the spectacle beyond that door that she had prepared earlier. This is exactly what the princess of the moon wants.
"You are aroused, dear sister." Luna said with a smirk. She closes the door and returns it to the position she moved it from. "In this condition... will you admit that I am the better princess?"
Celestia realized what Luna's plan is, and in response to her question, she whips her head away. "No, Luna. I am not one to submit easily to my needs."
Luna can sense she's wavering, even though her voice sounds calm. Smirking, she brings in another door, shoves it right in front of Celestia's face, and opens it immediately, forcing her to see another... vulgar spectacle.
Applejack is bending over inside her barn, holding a lasso on her mouth that's wrapped across Big Mac's body. She gives it a tug, prompting her brother to come closer. The female farmer moves her tail to the side, exposing herself to her older sibling.
"Come on, Big Mac, ya gotta fulfill yer bet to da rodeo's winner~" She wiggles her rump at him, making him blush.
Nervous, but not rejecting, Big Mac obediently obeys with a blush and an 'Eeyup'. He timidly let his tongue out and traces the tips of her marehood, making Applejack shudder. Her lower lips winks in response, and shows that she's a bit wet, and it's not from her brother's saliva.
"Aaahh~ Good one, Mac. Ya do this on Sugar Belle too?" Applejack smirks, before moaning from the touch of Big Mac's tongue, who starts poking into her, tasting her insides and love juice. Her marehood tries to keep it in, pressing her inner muscles against the tongue, and rewarding the mare with some extra pleasure.
Princess Celestia wants to look away, as staring at the scene is what exactly Luna wants from her, but she can't. The image even closes in on Applejack's marehood, and the tongue licking it. She can feel the sensation of being eaten by somepony even though it's not her who's getting the treatment...
Wait, there's actually someone eating her out! With shock, she turns around to see Luna, diving her muzzle between the white alicorn's buttcheeks, and lashing her tongue at her marehood while having her eyes closed. Celestia can even hear the sound of her saliva... or is it her mare juices leaking out?
"LUNA!" Celestia immediately whips her body around, bluching madly. She wants to get angry at her, but she cannot deny that it felt real good, obviously Luna knows a trick or two. And besides, them being sisters, means it's incest, one of her secret fetish she likes so much. Even princesses have them too. Knowing how she's getting more aroused, Luna teasingly wiggles her tongue. Celestia can see some of her juice on her tongue.
"You're so easy to arouse, sister~" The younger alicorn retracts her tongue and swallows the bit of juice on her tongue, making sure Celestia can hear her gulp. "Just mere flicks with my tongue, and you have leaked that much juice?"
"This is... disgusting, Luna! This is not proper!" Celestia is clearly flustered, her usually calm demeanor is nowhere to be seen. "We are sisters! That kind of behavior is... unacceptable!"
"Hah, but is that not what makes it so good?" Luna smirks, walking around her older sister, who keeps turning to follow her so she cannot touch her rump again. "Don't lie to yourself, Celestia, I know everypony's deepest dreams, even yours."
Princess Celestia starts to sweat, knowing it is very likely to be true. As a guardian of a realm where everypony can make anything happen, she would be able to see it all, even the lewd ones. It just somehow does not cross her mind that she's also under Luna's eyes when she's asleep, though, it's not like she can control her dreams. Luna leans her head on her older sister's neck, looking her on the eye with a sultry stare.
"If you admit that I am the better princess... I will finish you off, Tia." She purred, wiggling her tongue once again. This will surely break her sister, and forces her to admit it, or so Luna thought.
Celestia shook her head, still stubbornly refusing to say it. "I shall not be swayed by a mere need of release, Luna! You need to do better then that!"
Luna winks, and the second door closes, bringing in a third door, colored purple. "So be it, sister." The door opens before anything else happened.
The scene is on another bed, there's a light gray unicorn, with a light purple mane, laying on it. It's Twilight Velvet, and her tail, with the same color of her mane, is swaying from side to side. Behind her, is none other then her own daughter, Twilight Sparkle, the princess of friendship, and Celestia's ex student. Both mares are staring at each other with bedroom eyes.
"Oh, Twilight, it's so nice of you to do this for me." Velvet said, presenting her rump. Her legs touches the floor as her lower body comes off the bed. Twilight happily approaches her.
"It's the least I can do, mom." The young alicorn giggles cutely into her hoof. "Happy mother's day."
Twilight opens her wings to her side, and brushes both of their tips to the edges of her mother's marehood. She pokes it inside her just slightly, before spreading it. Velvet sighs at the feeling of having her love hole getting brushed by the air, before it turns into a moan once her daughter's tongue laps the insides of her. Twilight swirls her tongue all around the inside of her mother's lips.
"Mmh..." Velvet moaned, looking back to see the sight of Twilight eating her. "You have r-read books about this, haven't you? Aaaahhh..."
"Of course, mom." Twilight said happily. "I even learned how to do this..."
The alicorn made sure her mother's marehood is all nice and wet, before she moves back. Velvet turns her head around, just in time to see Twilight lowers her head, and gently inserts her horn into her marehood. It takes her by surprise at first, especially since the horn is not warm like a member of a stallion, but it has a decent size to make her feel good.
"O-Oooh! T-Twilight! My baby girl!" Velvet moans as Twilight starts to pull out and pushes in again, slowly thrusting her horn. Then, she decides to use her magic to pull her mother's tail higher, but at the same time, her lit up horn makes it considerably warmer, and Velvet moans again in agreement.
Twilight licks her lips as she sees her mother's love juice starts to drip from her hole, as she continues to slowly thrust her horn in and out of her. She would hear her mother sigh in pleasure everytime she pushes it in.
"T-Twilight..." Princess Celestia's jaw slowly went wide as she sees one of the ponies she cares the most is also doing something that she considers taboo. It's something about watching somepony so close to her doing it makes the scene so arousing for Princess Celestia. She can barely hold it, her hoof subconsciously starts moving south, towards her wet marehood...
Until Luna stops her.
"What is wrong, dear sister? I thought you said you can handle this?" She teased. Celestia gulp at her words. Never before she wants to be touched this badly. She just need a bit more stimulation so she can get a much needed release, and though she hates herself for this, but she wish Luna would do it again.
Meanwhile, the scene of the Sparkles keeps on going in front of her. She has to wonder how it would feel to be penetrated by a horn like that... She did lots of things with herself sometimes in a free and privates days, but never a horn. Just then, Celestia feels a pair of hooves spreading her buttcheeks, however, this time she just froze in place, not reacting. Her mind is still resisting, but her body no longer obeys her.
Luna observes Celestia's dripping marehood. From experience, she knows that she's almost at the point where all she desires is pleasure. "I can sense it, Tia... You want to know how it feels to have a horn in you, right?"
Before the alicorn can answer that, she once again feels the warmth of Luna's tongue on the edges of her lips. "Well, I happen to have a pretty nice, long horn, right here~"
Celestia wishes she would penetrate her with her horn instead of just teasing her with her tongue, or at least get off her tongue, but Luna is going agonizingly slow, and only going around her rim, never going in. She's caught in a state of kept getting aroused, but it's never enough to send her over the edge. Her younger sister is completely playing her, and she does it really well.
"But I'll do it... only if you admit, that I am the better princess."
Celestia knows where this is going, yet, her mind is still on conflict with herself. Which one does she wants... no, needs more? The claim to be a better princess from a sibling rivalry? Or a sexual release? considering the situation she's in right now, It doesn't take long for her to decide.
"Luna..." Celestia speaks up, almost getting her voice stuck in her throat. Her tongue rolls out from the pleasure she's getting.
"Yes, my sister?" Luna cheekily asked. Deep inside, she already knows the answer, but she want to hear it. She wants to hear the words she had been wanting to hear from her sister's own voice.
"I... I surrender..." It's much harder for Celestia to say that then she thought. Their sibling rivalry must've been deeper then she thought. "You are... the better princess... N-Now... please..."
Surprisingly for Luna, Celestia bends down, and lifts her tail, completely exposing herself to Luna. Her wet marehood is dripping wet from her juices, and it keeps on winking. She's desperate for attention. "Please...! Make me cum...!"
Smiling, Luna bends her head down, and aligns her horn with Celestia's lips. The white alicorn looks behind her and sees the dark blue horn lined up, ready to penetrate her. She managed to see Luna's eyes looking at her. Giving her a wink, Luna pushes forward and immediately fills Celestia with her horn. The princess of the sun let out a silent moan, her voice got caught in her throat, briefly, before the actual moan comes out. Saliva starts to roll down her mouth from the amount of pleasure she's getting.
Remembering the little trick from the scene she had prepared, Luna lit up her horn and pulls Celestia's tail gently while warming up her inside with the glow. She braces her hooves right on the alicorn's flanks so she can push into her harder, coating the entire length of her horn and even part of her mane with Celestia's sex liquid.
For Celestia, many things are swirling in her head as Luna fucks her with her horn. This is so dirty, unfit of a princess. This is so embarrassing, getting utterly defeated by her younger sibling. This is so wrong, having a sexual activity with someone that shares her blood. This is all... so arousing for her.
Since she had seen all the scene Luna had prepared, and some teasing from her, it didn't take long for Celestia to feel her climax approaching. Noticing this, Luna quickens her pace briefly, before she pulls out almost entirely. Suddenly, she pulls Celestia's tail with her magic while slamming her horn back in. The white alicorn let out a shriek as her inner muscles clenches Luna's horn several times while more of her love juice flows out of her vagina onto Luna's mane and horn.
Celestia have no idea how long her orgasm lasts, but as soon as she doesn't feel Luna's hooves on her flank, she collapses to the ground, completely exhausted, humiliated, yet satisfied. As she looks up, she sees Luna running a hoof on her own horn, catching the juice on it, and licks it.
"Alright, sister. I think it's time for a rest..."
Princess Celestia suddenly finds herself on her bed, tucked in nicely. She checks the clock, and it's around an hour to sunrise. What was that? Was that just a dream?
The alicorn rolls on her bed, when she feels something wet. It's her marehood. It seems to be leaking her juice. And there's the feeling of having something shoved into it... "Luna?" Princess Celestia then lays on her bed face up, thinking about what just she went through. She just admitted that Luna is the better princess, and she just got horn fucked by her too...
Slowly, her hoof find it's way to her marehood, and she slowly rubs it, thinking of Luna who's doing it for her.
"Luna... I should see if I'll have time to do it again..."