Nightmare Moon's return

by PrincessLuna123

Rating: mature
Tags: Slice of Life, My Little Pony: Friendship is Magic, Alternate Universe, Main 6, Nightmare Moon, Romance, Princess Luna, Princess Celestia, Sex
Length: 4737

When Nightmare Moon is summoned again on a full moon by Luna to answer a few questions, things quickly go downhill as Luna finds herself in a very needy state.

On a cold, lonely full moon a few weeks after the fall of Nightmare Moon, Luna is in the middle of two things. One, being heat, the second being plagued with questions for Nightmare Moon. When she uses lack magic to summon her former self, things quickly go from a question to her on her own bed. Instead she finds herself asking, the next morning: Can a half of me get me pregnant? Oh well, that can wait. She has some explaining to do.

Contains: Futa and sexual content

Credit goes to Starlightspark for the cover art.

Published 2015-09-25 11:40:02 UTC
Last updated 2015-10-06 23:50:20 UTC

A very odd full moon

Princess Luna sat atop her balcony, staring up at the full moon, watching a few wispy strands of clouds float across the surface. A sigh left her mouth as she glanced down at the old, aging book opened up at her hooves, not sure if she should still go on with this. Three weeks after she had been cleansed of Nightmare Moon, Luna could still feel her presence. Feel her gnawing at her, begging to be free. It was getting harder and harder to control, the only thing on her mind the past few weeks had been her past self. It had given it power, given her a fear of it. She needed it gone, needed it out of her. She needed her questions asked, and then she'd trap it back inside of her. Luna knew if this went wrong all of Celestia would pay for her mistakes. But she was filled with questions for her past self. Hopefully, then, the thoughts would be gone, and the feeling inside of her would cease to exist.

Luna was alone, of course. All of her guards had been sent to the courtyard. Mostly she didn't want herself getting tangled up with a few stallions, but she kept telling herself it was so none of them would rush inside and see Nightmare Moon sitting there in-front of her. Giving another deep exhale Luna looked down over the book. She couldn't back down now, she was going to go through with it. The small, dark blue alicorn breathed out the words on the crinkling, stained page of the book, her horn slowly starting to glow. Slowly, she let herself get louder and louder, mumbling, pressing her hoof against the middle of the book, giving off a shout. A white light flashed before her eyes, the princess was thrown onto her back, the book itself starting to smoke, the white light glowing from it. The flash ended, the book was gone, and on her balcony stood the powerful, tall Nightmare Moon, staring down at her with curiosity.

Luna sat up trembling before standing up, holding herself together.

"Nightmare Moon! I have summoned you tonight to talk with me. There will be no fighting, there will be no hatred," Luna held herself together, not wanting to show any weakness.

"I wish to speak with you tonight, I have many questions to ask of you. If you try anything there is a magical barrier around this room. It will go off, draining us both of magic, and my guards will rush in and capture you. Is that understood? I need to get things off of my mind, I need to erase the feeling of you."

Luna spoke with as much power as she could muster, staring up at the near black, taller alicorn, watching her mane and tail flow behind her, seeing her sharp teeth spread into a grin. Being the smaller and weaker of the two, it was a little hard to keep her voice strong so her bluff seemed more real, though she hoped NMM bought it.

Nightmare Moon of course could detect that there was no magical barrier. There would be a glow around the room, Luna had given a nice bluff, a convincing one at that, though the Queen simply smiled. She'd amuse herself for tonight, nodding.

"Alright, if you insist. Come sit by me, then. I will answer the questions that you have."

A little sniff came from the Queen, a certain scent was in there air. Another smile went across her muzzle as she easily picked out what it was. Her poor, poor Luna was in heat. Even if she was simply a form, as one would say, of Luna, she could not help herself from growing a bit erect, though she turned and sat down on the balcony to hide it, waiting for Luna to come over. Oh, Nightmare Moon was proud of what she had. Being a Queen like herself, it was only fit for her to have the parts of a stallion in her mind. Many mares had taken the bait, though the thought of having sex with well, her own self, was much more arousing than a simple old mare. Luna may have wanted questions from her but now the only thing on the dark alicorns mind was seducing Luna.

The smaller alicorn nervously came forward to sit down besides her, looking up at the full moon. Honestly it wasn't that hard to miss the dark black shaft that was erecting from between Nightmare Moon's legs, as she was giving no effort to hide it at all. Luna's cheeks went red as she coughed into her hoof, looking back up at the moon. In heat, the scent, being so close to Nightmare Moon, was under the nose, and driving her wild. Her slit was already puffy, slick with need, softly being ground against the cold stone of the balcony as she began.

"I.. Well.. I first, wanted to ask you about spells. Why this happened and the feeling inside me.. Those can wait until later. I want to be more powerful, I don't wish to be the baby sister anymore. I am asking you, tonight, to teach me some spells. To help me better control the night. Please."

Nightmare Moon rolled her eyes, grinning.

"Oh, what feeling, little Lulu? I can smell another feeling inside you, and needless to say I think you have already taken a glance at what I have to offer, no?"

Moon slid closer to her, hoof running over her smaller self's back, their flanks pressed against one another. Or well, her flank pressed into Luna's side, but it was close enough. Spells could wait, questions could wait. She'd been locked up on the moon for a thousand years, only to return and be trapped inside of Luna. Oh, she didn't want to answer questions. Moon wanted her shaft to be enveloped in soft, warm folds that would milk her for all her fertile seed. Moon trailed her hoof a little lower before pulling it away, leaning down to nibble at Luna's neck. The smaller alicorn did nothing to stop, she did not pull away, she simply gave a little moan, grinding her wet marehood harder against the cold stone.

Luna could see Nightmare Moon's fully erect shaft now, glancing down at her rather large, plump balls. It was larger than any of the phallic items she had seen inside of Celestia's room, is was larger than she ever though a stallion could be.. A shiver went down her spine as the thoughts of being mated ran through her mind. This was just some fun with her past self. It wouldn't harm any pony, there would still be time for questions later. Oh, I simply can not.. I.. I'll enjoy this night. She doesn't seem to want to take me over, she seems calm.. I need this, I need it bad. Oh Sister, forgive me for what I'm about to do.

A nod was all she gave to answer Moon's question, stopping her grinding, her cunt a sopping mess of mare juices, begging to be filled. "Y.. Yes.. I did g-glance at it a few times.. We.. I, I think we are both in dire need of some pleasure. You can answer my questions later, Nightmare."

"Well then, wonderful. I have no desire to simply plunge right inside of you, I plan to enjoy this night. Have you ever done this before?"

Nightmare asked, getting up onto all four hooves. The large size bobbed as she did, getting a needy glance by Luna. Being a Queen she was blessed with a rather large part, bigger than a stallion, a perfect size to fill a mare up right to the brim. Walking over to the white, crescent shaped bed Nightmare Moon slid onto it to lay on her back. About eight plush, furry pillows propped up her head, the thick, dark purple shaft between her legs twitched lightly, a small droplet of salty pre already trailing down the pulsing, intimidating size.

Luna didn't answer, they both knew she had never taken a suitor before. Now a days it was as simple as asking a stallion into bed, though back then it was very royal, very planned out, the only stallions allowed to even consider asking the Princess's to such a thing was a noble, and all of them were simple atrocious. So, she had never taken a mate before. Mating seasons had always been hard for her, though Luna usually ended up rubbing herself every night for a while before some relief finally came to her. So this was her first time with a stallion. This was how she'd lose her virginity.

To her other half.

She climbed into her bed slowly, giving a little sniff, her marehood on fire with need, aching to be filled by something. This was.. Something romantic. It wasn't a random stallion, it was herself. It was her past self who seemed intent on curing both of their needs. Was that a romantic act? Slightly so, perhaps? Nightmare watching out for her? She did not know, but what she did know was that she was going to enjoy this night before Nightmare was gone. The thick, pulsing shaft now stood an inch from her face, her nose nearly pressing up against the medial ring. The scent it gave off was overpowering, but fear of its size still coursed through her.

"So.. You wish for me to.. Suck it? I have heard stories from mares about doing such things, though nothing anything like this has never been in ou- My own mouth."

A nod from Nightmare made her gulp nervously, but lean up slightly to lick the flare. Salty pre had slicked up the tip, giving her an odd, salty taste on her tongue. Either way Luna continued, continuing to lick at the flare, running her rough tongue over the hot, thick flare before opening up her mouth. She took the head in, followed by another inch. It felt foreign, with something so thick being inside of her mouth, but the flaming desire in her marehood would not go away without the help of a stallion, and Nightmare seemed more than capable of extinguishing that need. Grinding her drenched pussy against the bed Luna moaned softly, vibrations running down the shaft in her mouth, being met with a droplet of pre.

"Mmm.. That's very good, Luna. Your mouth is divine, I will say. It's been a very long time since I have felt such pleasures, do continue on, though. Let me help out a bit, hm?"

Nightmare said with a burst of light coming from her horn. Blue magic coated Luna's pussy and clit, a warm, jolting feeling running through the both of them. Instantly the effects caused the smaller alicorns wing to open up, eliciting a laugh from Nightmare.

"Do enjoy little Luna, this is a spell I might teach you tonight, it comes in great use when one is alone.."

Luna's only response was a muffled moan, both her hooves rhythmically stroking the black cock, trailing up and down quite fast. At the same time she had gotten over half of the meaty shaft inside of her mouth, though whenever she tried to go lower a gag came from her and the comfortableness quickly faded. So she stuck with bobbing up and down while her hooves stroked off the rest. The soft bucks from Nightmare proved she was doing a fine job, the constant throbs of the shaft spurring her on. The musky, strong scent of a stallion was all she breathed in, her cunt aching even more in response.

The dual assault of her clit and pussy was proving to be simply too much for the little alicorn, as her bobbing slowly became more and more wild, more off pace, her hooves sloppily stroking the shaft. Luna's tongue weakly prodded the shaft, eyes glancing up cutely and, quite arousingly at Nightmare. The first orgasm she had had in at least a thousand or so years was racing towards her nether, the burning feeling in her spreading throughout her whole body, filling her with a numbing bliss. The constant throbbing and bucking would prove useless to Luna as she had no idea what was coming. All her body was focused on was grinding hard against the sheets while the magic did the rest of the work. A moan of pure pleasure escaped from Luna's mouth, sending tingles all the way down the black shaft buried slightly in her throat. Mare juices squirted out from her pussy, just at the same time a salty, thick, hot strand of goo shot down her throat.

The princess's eyes bulged out as a gag escaped from her, a strong hoof pushing down on her head, pushing the rest of the shaft down her throat. Luna's poor neck bulged out slightly in the front from the thickness, pain welling up in her jaw, just as tears did in her eyes. Though the pain was quite dulled down as her orgasm raced through her, little squirts of juices escaping from her. Nightmare's seed wasn't that bad, really. It was salty, slightly sweet, though the only problem was that there was simply too much for her to handle.

Cheeks swelling up with seed Luna pulled off, sputtering out what was in her mouth all over the shaft, coughing violently before taking in a deep gulp, glad for fresh air to finally get into her lungs. The last few strands roped across her face, with a final one landing across her crown and mane. Even with an orgasm the desire in her cunt did not fade. Falling onto her stomach she panted heavily, cum dribbling down her face, wide eyes staring up at Nightmare Moon. Just the blowjob had gotten her out of air, making her want to close her eyes for a little bit; desire or not.

A sudden yank at her waist made her yelp, a grunt escaping her as she fell onto Nightmare's stomach, the throbbing, semen covered shaft still oozing out a few last droplets pressed against her back.

"Oh, do not think the fun is over just yet, little princess. I haven't even given you a proper fucking, have I? My needs are still here, and I can assume just a single orgasm did not cure you of your heat, even as powerful as it had been." Rolling her hoof she bucked up a bit, smearing some semen over Luna's back, matting cum into the fur. "Come on now, Luna. Do not be shy."

Gulping down her fears Luna lifted her hips up slowly, looking back at the powerful, worthy-of-a-queen's cock, knowing it was going to be a hard one to take. Finally aligning her sopping marehood up against the wide flare, Luna pushed down. What she thought was so much entering her was simply the flare entering inside of her, and a nervous giggle escaped from her. She had thought she had pushed down hard, gotten so much inside, though this pain was just from the flare. Luckily the pain was quickly subsiding, the pleasure of finally having something inside of her filling her with the need to be even more full, to milk Moon's shaft for all it was worth. The soft moans of Nightmare spurred her on, knowing that the larger alicorn was enjoying this very much.

Enjoying it very much didn't even compare to what Nightmare was feeling. Such tight, hot, soaked walls clung down onto her shaft, sending jolts of pleasure down the throbbing pole. Covered with saliva and spunk, it was no doubt easier for Luna to slide down. A resistance halted the sliding of Luna, a gulp easily heard from the smaller princess before her little Luna was a virgin no more. Two strong fore hooves pressed down onto her chest, a grunt of pain escaping from the mare sitting atop her shaft. There was still quite a bit more to go, hopefully Luna would be able to take it! For a normal mare her shaft was simply too large. There was always more than a few inches left over with her flare already bashing up against her cervix, though Luna was larger than a mare. Of course, as big as she was, she doubted Luna would get away without her cervix being hit along with a few stumbles the next morning. Moon's sharp teeth spread into a grin at the thought of that, seeing the smaller alicorn limping from the night they were going to have.

Inch by inch, Luna slowly pushed herself down. Hooves holding her steady on the dark chest of Nightmare, allowing her a sort of grip to help push herself down harder. Her vaginal walls clenched down hard on the intruder, happy for something to fill it, happy for something so.. Thick, so large, so.. royalfilling her. Soft moans escaped from her lips, hind legs spreading out more as she slid herself down the jizz-covered pole. At about half way in, once again, she couldn't go anymore. Luna began bouncing herself up and down slowly, one hoof on Nightmare's chest, the other held up in the air, soft moans escaping the mare as she used all the strength in her hind legs to bounce herself up, freeing herself of the painful thickness of the invader before coming back down hard, filling her with the firely bliss of something filling her. Of course there was still much more of the shaft to go inside of her but Luna simply couldn't push down any more. She wanted a release, selfishly, deciding to stop to cure her greediness.

The pleasure was overwhelming, the moans coming from her only getting louder and louder, her bounces soon met by hard thrusts upward by her evil, past self. That simply drove her over the edge. A long, thick size inside of her bucking up deeper, the aching need to breed in her pussy. It sent her right over the edge. All energy was sapped from the mare as Luna fell forward, head buried into Nightmare's neck, her abused cunt clenching down as her mare cum rushed out over the shaft buried inside of it. Numbness was all she felt besides the heart-eyed pleasure of having yet another orgasm.

She hardly noticed when Nightmare wrapped her slender hind legs around her, bucking up hard, balls slapping lightly against her bubbly moon butt, the flare slamming hard against her cervix again and again. Her crescent shaped bed rocked under them, threatening to break from the use. Her walls squeezed down vice like on the cock pounding its way inside of her, Luna's mind broken down to only one though. Breed. On their own her hips rolled themselves back to meet every brutally hard thrust into her pussy, dazed moans spewing out from her mouth. After a few minutes she was finally broken from this dazed, pleasing feeling. The odd feeling of such warm, soft lips wrapping around her horn. Slowly but surely Nightmare's head began to slam itself up and down, taking in most of her horn on the first go, swirling her tongue around the sensitive part. The combined feeling of being pounded so hard with her horn being sucked sent her onto a third orgasm. The princess's eyes rolled up, her teeth gritting, jolts running through her body as she squirted all over the shaft, her velvet like walls clenching down hard. This pleasure seemed to be too much for even the experienced Queen even, as the horn sucking stopped only to be met with a passionate kiss, a long tongue snaking its way inside her mouth.

Those plump balls pressed up against her ass, the flare pressed hard against her back wall. Hot, gooey ropes of semen erupted from Nightmare's throbbing cock, spewing out fertile seed right into her needy, abused cunt. Luna didn't exactly moan, what escaped from her mouth was a mix of a scream and a groan, her eyes rolling up into her head as another orgasm rocked through her body. It was simply too much. Four orgasms, being pounded oh so very hard. She found her eyes starting to close as spunk began to leak out of her still being filled pussy, exhaustion running over her.

Author's Note

Next chapter will be up soon, hopefully. Haven't written in a while, hopefully it isn't garbage.

Do enjoy. :heart:

A very odd morning

Luna groaned as she stirred in her bed, lifting up her head. Sleep clung to her, weighing her down as if she were chained down by iron balls. She really couldn't remember what had happened last night. Thinking about it hurt, it was all fuzzy to her. The sun wasn't up yet, so that was good. It wasn't early enough for her to raise the moon; if she had missed it Celestia would kill her. But right now that wasn't on her mind. Her whole body was completely exhausted, she could barely open her eyes, and not to mention her hind legs! Oh, she could barely feel them, her hips burned with pain also. What were these pains, where had they come from? Luna's eyes suddenly widened as the sleep seemed to drain from them. Fear filled her, the princess began to tremble.. She was laying on top of Nightmare Moon, cock buried inside of her pussy, cum still oozing out. Soft snores filled the room from her counter part, who looked quite cute while sleeping. It all flooded back to her, last night, so her fear ended. I'm such an idiot.. Bringing a hoof to her head she groaned.

The spell was only supposed to last one night! Her counterpart was supposed to fade, to be gone by now. She was supposed to wake up, heat gone, problems gone, and continue on. But no, here she was, still covered in semen from the ass down, with a cock inside of her, and Nightmare Moon snoring quite loudly under her. If she could she would have cast a spell or moved off but her body was still so weak from last night that even the slightest of spells strained her. If it had been a normal stallion she would have been fine, but noof course it had to be her evil self, with such a huge cock, with such a cute, soft sleeping face under her. Why not ANY pony else in all of Equestria? And more importantly, how was she going to explain this to Celestia?

"Hi Tia! I sorta summoned Nightmare Moon, had her buck me unconscious, and she can't go back, I guess! This wasn't going to be something easy she could explain. First and foremost she had to clean herself off, make herself look presentable, get the smell out of the room, AND lower the moon before slipping over to Celestia. She was most tired when raising the sun, so it'd be the perfect time to let it maybe slide under her groggy sister.

"Ughhh.. Nightmare.. Mooni.. Mooni.." Luna groaned, giving a little stretch. In all honestly she didn't mind the cuddling, but she had duties to attend to. She had to clean herself up and maybe had an hour of free time before she had to get to the moon.

"Come on.. Come on.." A little prod to her cheek, a little nuzzle under her chin. Come on.. Can't she just wake up?

Finally Nightmare woke up, opening up her eyes with a little yawn, blinking them a few times before a smirk went over her face.

"Ah! Little mare, what a glorious sight to wake up to.. I must be honest, I've never woken up to such a sight.. Ohf.. And such a feel! I didn't feel the need to pull out after I came last night, so I sort of just slept inside of you. It is quite the feeling to wake up, I must say. Do you want off?" Moon asked with a little chuckle, lifting her off after a little nod.

A steady trickle of seed leaked out when Moon lifted Luna up, landing all over the bed, adding to the puddle that was already there. Most of it had leaked out overnight, staining the sheets under them. The room reeked of sex, and the seed on the bed and ground added more evidence to what had happened. Nightmare liked it though. She knew what Luna had messed up in, though wasn't going to point it out. While Luna had done this on a Full Moon as the book had said, she had used the wrong page.

Either by the wind turning or by her misreading it, she had put too much emotion into it, too much magic. It was a very simple spell, meant for one night, but with how much Luna had poured into the spell. Along with using the wrong spell, she had put too much magic into it. It clearly stated at the bottom to NOT do what she did, so well, the effects were permanent. She was stuck here in Equestria, no way to combine her back with Luna. She was her own, free spirit now. Though of course this would cause some complications. She WAS an evil queen and HAD just dumped a load of semen into a princess who did happen to be in heat. Oh, she couldn't wait to explain this!

"I must say it feels great to be.. Well, myself! Not bound to you in any way. You really are good with your spells, aren't you? Well, we have a few hours to think this over. I'll think of something to say to Celestia, I advise you do the same. I'm.. Trying to stay calm, so you do the same, alright Luna? I'll let you clean yourself off in peace. Easier said than done though, huh?"

Luna didn't have the strength to respond. She had used it all up waking up Moon, so she was bone tired as she slipped off the bed, royal slippers clopping on the ground as she walked weakly over to her royal bathhouse. If Moon could stay calm, she would have to also. Celestia was going to be furious, who knew how the kingdom was going to react. The princess's mind was far from pregnancy, Moon was well, her! A form of her. There was no way a form of her could get her pregnant. Without closing the door she turned on the water for the "tub," though is was more of a pool. Sinking in before it was even full Luna sighed at the feel of it, sitting down on her haunches to get more comfortable. Hot water splashed down onto her hooves, quickly filling up the royal tub, easily big enough to fit seven or eight ponies. She came here to relax often. It was a heaven away from the bustles of politics, which really weighed down on a pony after some time. Though she hadn't been here for that long, Luna was already sick and tired of diplomacy and royal matters. All the new rules, all the new customs. Everything since she had been ruling had changed. Shaking her mind Luna focused on just getting herself cleaned off and awake.

The royal bathrooms for both her and Celestia were quite grand. Splashed over with white paint and white tiles, they were decorated at the ceiling with their cutie marks. Statues of scholars and warriors spurted water into the tub from the side, dressed in dresses and toga's. It wasn't much, but it was better than what most had. The sparkling cutie marks on the ceilings and the marble statues were worth a fortune, so it wouldn't be easy to find it somewhere else. To her, the best part was how the steam filled the room up, creating a humid, hot atmosphere to let go in. Closing her eyes the princess groaned. Today was going to be a very long day.

Author's Note

Just a small little chapter to push into the next one! Just wanted to have a little back-round and explanation on how NMM is going to be staying here. Will be kicking up the next chapter within the week.

Expect some bathroom fun to come up. :ajsmug: