The black alicorn soared through the skies towards the grand castle defining the view of the mountain-top city of Canterlot. She aimed for the tower in the middle of the building, landing without a noise on the balcony. Much to her surprise, the door was cracked open, the deep red curtain pulled aside. She crept closer, peeking inside the room. Celestia was laying on her bed, on her stomach. Nightmare could not help but notice how she was turned towards the balcony door with her hindquarters, legs spread, her position already planting certain thoughts in her mind. She secretly wished that the flowing, colorful tail was not there to cover that, at least according to Moon's imagination, perfect marehood.
She shook her head and inhaled deeply from the cool air of the night, then focused on her plan. She had a princess to neutralize. She slowly and very carefully opened the glass door further, sneaking up to the seemingly sleeping Celestia. She was nothing more than a minor inconvenience. A small bump on her road towards her ultimate goal, eternal night. She was easily neutralizable in this exposed state.
Nightmare repeated these thoughts in her mind several times as she sneaked closer and closer, but her thoughts trailed off all the time, no matter how hard she denied it. She was not beautifully shaped. Her hind legs were not nicely toned, and her flanks were not deliciously plump. Her angelic face did not make her feel bad about what she wanted to do. Her neck did not look so good to nuzzle. And above all, Nightmare Moon did not find her extremely attractive.
Her attempts of controlling her own thoughts became more and more futile, so she decided to not waste any more time, jumping up onto the bed and pinning Celestia down with her front hooves. The solar princess raised her head from the pillow and looked back up, a slight smile forming on her face.
"I've been expecting you..."
Nightmare looked at the princess with an experience of slight shock, which Celestia must have noticed. Using the opportunity, the white alicorn turned over onto her back, now Moon's front hooves were resting on her shoulders, her pressure waning. She stared deeply into her eyes, her magenta eyes, beautiful and shiny like jewels locked with her slitted greenish-blue eyes. Moon just looked and looked, her mind slowly drifting from her plan of incapacitating the princess.
"I know what you want..."
Celestia raised a hind leg slowly, her back hoof rubbing up Nightmare's inner thigh, the mare shuddering lightly with a blush on her face. When she spoke, her voice sounded high-pitched and shaky, very unsure of herself.
"N-no! You don't! I will take over Equestria a-and the night will last fore-ever... You will be-..."
Moon's voice became more and more quiet towards the end as she felt Celestia's back hoof raise higher and higher along her thigh, losing focus again. Celestia never got to hear what did Nightmare plan for her as she continued to stare into her eyes with a gentle smile, while her back hoof went even higher, straightening somewhat to press up against her sopping wet marehood, her pearly white hoof stained with Moon's juices, whose face exploded with a blush, her eyes going wide and her ears folding back.
"W-what are you-u d-doing.."
Her voice was barely more than a whisper and her jaw hung open, speaking becoming an impossible feat as Celestia increased the pressure that her hoof applied on her slit. The solar princess took hold of Nightmare's shoulders and flipped them over, removing her back hoof from her wetness, Nightmare letting out a shaky squeal as Celestia reversed their position.
"This is what you actually want... Not rulership, nor eternal night... You just want to be loved and appreciated... Somepony to take care of your needs~"
"N-no! I want the ponies to bow before me... To see the night's superiority..."
Nightmare was very uncertain of herself, her blush deepening as she could not deny the truth of Celestia's words, while the princess' muzzle inched closer to hers, her plans of making eternal night becoming of lower and lower priority.
"You want your 'big sister' to love you... But not the sisterly way, mmm, no..."
Celestia laid a tender kiss on Nightmare's lips, amused by the whimper-like noise her 'enemy' produced, retracting her muzzle to see her face burning crimson, less and less of her cheeks resembling their actual jet black color.
"You want the Sun... You want me to do naughty things to you...~"
Nightmare became increasingly sure that she could live her life like that, loved and 'taken care of' by Celestia, her intents on taking over Equestria hurrying to get out of her mind as she rose her head from the soft pillow, trying to press her muzzle to Celestia's but it rose higher and higher, not allowing contact.
"You don't want to be enemies... you want to be lovers..."
A white leather collar with black fuzz on the inside appeared around Nightmare's neck and she quickly reached up to it with her hoof, grasping it.
"Don't protest... I promise not to do anything you wouldn't like~"
She obediently let go of the collar and put her hoof back down. After all, Celestia's words sounded so good as she said all the things that she denied countless times in her mind during the period while she worked on becoming material. She hoped that Celestia would make those words come true.
She closed her eyes and expectantly parted her lips as she saw Celestia's head lower towards her once again, but the muzzle didn't came. Instead she felt a sudden shiver of pleasure run down her spine as Celestia dragged her tongue up her horn, the slippery muscle following the ridges of the long black horn. Her pleasure only increased with time as Celestia's tongue was accompanied shortly by her hoof, the way it slid down to the base of her horn made her relax, while the white alicorn removed her tongue, followed by her hoof not much later, which returned to Moon's shoulder.
"That was good, was it?~"
The answer came in form of a soft whimper as Moon opened her eyes to look up at her again.
"Only good things like this will come, if you choose me~"
Her choice started to become more and more clear in her head as Celestia leaned her head down to kiss her neck and throat lightly, many times while Moon's blush persisted, the dark mare closing one eye in pleasure, her muscles tensing up every few kisses. This urged Celestia to move lower with her kisses, dragging her tongue along her collarbones, earning a muffled squeal before she trailed kisses down her chest and down her stomach. She slid her whole body lower, stopping her muzzle over Moon's exposed mare bits.
"Oh my... you must really really want me~"
"Nnnh... p-please~"
Her voice was airy and sounded needy, Nightmare struggling to keep one eye open to look at Celestia between her hind legs. She was positively soaked down there, her wetness trickled down from her lower lips to her plothole and soaked the dock of her tail. Celestia nuzzled and rubbed her face on the inner part of Moon's thighs, focusing on both of them, several times trailing dangerously close to her naughty bits, causing one or two whinnies from Moon by exhaling onto her wet marehood through her nose.
"P-please..."
"Patience is a virtue that will be highly rewarded...~"
Celestia lowered her head to lick at the dock of her tail, gathering some of Moon's tasty juices from there, then her tongue went up to circle around her tight plot hole, lapping up the juices that gathered there from right above, Nightmare's body tensing up for several seconds once again as she took deep breath to relax herself, yet her anticipation was too strong.
The solar princess stuck her tongue out and very gently dragged it up Nightmare's slit. Moon bit down her lip to muffle her moan as her pussy winked, her clit revealing itself for a few moments, just enough for Celestia to give it a strong lick with a lot of pressure from her tongue, causing Moon to let out a short but fairly loud moan with her eyes wide, a small squirt of her mare juices landing on Celestia's tongue and muzzle.
"You liked that didn't you...~"
"P-please... do-on't staahp.."
The once intimidating Nightmare Moon now appeared desperate and needy as she panted with her eyes close, her deep blush not leaving her face, mouth hanging open. She wanted this more than eternal night and the throne of Equestria. She wanted Celestia to make her orgasm. She wanted to stay with Celestia to receive this kind of treatment more than just one time. It was about time to put their rivalry behind them. If Celestia was doing this to her, it meant she would love her, right?
Her train of thoughts came to a halt as Celestia's wide tongue pressed to her lower lips once again, Moon's hooves gripping the bedsheets as the agile appendage parted her lower lips by the pressure applied, Celestia's muzzle being pressed to her slit as her tongue lashed out to gather her dribbling juices and take it back inside her mouth. She dragged out each lick as long as she could, pressing her tongue between Nightmare's puffy lips and flicking her tongue across her clit as she reached it.
Moon could not contain her lusty moans as Celestia's tongue went deeper with each lick she made, her clit coming in contact with her velvety nosetip with each time her pussy winked, as if trying to draw the slippery tongue deeper in. Celestia complied, pressing her tongue in as deep as she was able to, her mouth being pressed up to her lower lips while her tongue lashed about her inner walls.
Her moans got louder and louder as her muzzle rubbed on her clit, as Celestia's lips massaged her own lower lips, as the divine tongue lapped at her love tunnel, swirling and twisting and thrashing about inside while Celestia gulped the juices down every now and then, only to shove her tongue back in, sending Moon into higher and higher levels of extasy.
"T-Tiaaaaaah~"
Celestia started to hum a deep tone, knowing that the vibrations of her vocal chords would be transmitted through her muzzle, lips, tongue and mouth into Moon's love box, this new experience driving the black alicorn wild. She arched her back, gripped the bedsheets with her front hooves even harder, any and all thoughts of taking over Equestria and taking the Sun from the skies becoming a distant memory of the past on the verge of climax. She chose Celestia over everything she ever wanted before that moment.
The solar princess' hooves were placed on Moon's own Moon marks, rubbing her flank in circles and pulling her down against her muzzle, her mouth covering her almost constantly winking pussy, the tip of her snout brushing against Nightmare's clit as she squirmed and bucked her hips, trying to say something that was lost between her loudening moans, while Celestia's tongue did not stop working her leaking love tunnel, not even stopping to drag her sweet leakage back, instead the princess allowed the juices to dribble down her chin and cheeks.
Nightmare Moon was positively lost in pure pleasure, her moans rising in pitch and volume to screams of extasy, then it happened. She shut her eyes tightly, yet she did not see black, her vision exploding with stars and a plethora of bright, sharp colors even though her lids were squeezed together, her marehood clamping down on Celestia's tongue several times as she released numerous squirts of her hot, sticky marecum into the white alicorn's mouth, the torrents of her juices becoming too much to swallow at once, so Celestia had to remove her muzzle from Moon's pussy to gulp, the last few squirts landing on her face as Nightmare's orgasm slowly died down.
Moon was in a state of bliss, her muscles relaxing and she herself falling limp on the bed, panting heavily, her mouth wide open to allow for more air to enter her lungs, the deep blush slowly starting to fade from her face, her mind going completely blank as she laid there breathing heavily, mostly unaware of her surroundings, her body trembling lightly.
She could still feel Celestia sliding up next to her, wrapping her front hooves around her chest and pulling her close, nuzzling the side of her neck with her stained muzzle, rubbing some of her own marecum onto Moon's neck. She felt Celestia raise her head, but didn't expect the mare to cover her open mouth with her own. She murmured into the kiss softly, feeling her own taste fill her mouth as Celestia's tongue explored it, occasionally being dragged across Moon's own, the dark mare not bothering to kiss back, instead letting Celestia do whatever she wanted with her tongue inside her mouth.
Moon felt like the kiss went on for hours, Celestia's tongue entwining with hers, dragging it into a sloppy dance, before the princess of the sun extracted her tongue from Nightmare's mouth.
"So... what do you say, Moon? Was it worth to return? Will you want to get rid of me and make eternal night?"
"N-never... All I want is you... To be with you... Forever and ever..."
"That's a good girl... Finally you want something that is good... For both of us."
Nightmare Moon mustered all her strength to roll over onto her side and return Celestia's hug, the princess in turn placing a back hoof over Moon's flank and resting her head on her neck. Celestia's hoof went from Nightmare's back to her mane, stroking it with soothing movements. The black alicorn felt that she was drifting off to sleep quickly, so she hurried to tell what she wanted in a hushed, murmuring voice. She had to say it to put her mind to ease and be able to sleep. She had to let Celestia know she did not want to oppose her ever again.
"T-Tia?"
"Yes, Moony?~"
"I love you..."
