“... and how long have you been aware of this?”
Princess Luna sat on the cold metal surface of the nurse’s examination table, the heat rapidly departing her buttocks through her dark blue fur. The Princess of the Night was actively avoiding the gaze of Nurse Redheart, who herself was seeking to get to the bottom of Luna’s newest medical problem.
Luna had absolutely no intention of shafting Redheart, but she was embarrassed at finding herself at the mercy of, on the surface, a very hard puzzle to solve.
“A week. Maaaaaybe two.” Luna admitted, through clenched teeth. Redheart narrowed her eyes; Luna caved almost immediately.
“Fine, three weeks.”
“So, you have had a new body part spontaneously appear out of thin air, and you haven’t seen a medical professional for the last three weeks for a consultation?”
“Well… not a medical professional.”
Nurse Redheart sighed. “You told your sister, didn’t you?”
“I’m not sure what you want me to do about it, Lulu.”
Princess Celestia had experienced many things in her long rule of Equestria. Her sister walking into her chambers sporting a penis was not an experience she had yet counted among them.
“You haven’t even told me how this happened.” Celestia posed as she stared at Luna, who was now standing on her bed.
“Well, I woke up after an invigorating night helping ponies with their dreams, and feeling a little strange, I reached my hoof down and found a bump. So, I went over to the mirror, and sure enough, it was a sheath. Looking down a little further, I found what appeared to be a pair of testicles. Of course, I was curious now, so I turned around. Sure enough, everything else was there, too. I don’t even know how this is possible…”
“So, just to recap, you’ve woken me up, at four in the fucking morning, because you now have a penis, and you thought that I, your sister dearest, should be the first to know?”
“Well, yes…”
“...is there another reason you came in here?”
Celestia didn’t even have to wait for Luna to answer, for her new loins betrayed her, the sheath beneath her now giving rise to its contained organ. Celestia couldn’t help but admire the colour scheme, a light blue hue, down to the medial ring. A mottled pattern separated the ring from the rest of Luna’s dark blue shaft, and Celestia momentarily caught a glimpse of Luna’s scrotum, involuntarily swaying slightly with Luna’s movements.
Celestia tutted. “I hope you don’t plan on playing poker any time soon, because that is one heck of a tell. So, would you like to tell me the real reason that you intruded on my beauty sleep? You know it need it.”
Luna hesitated, not quite expecting things to be unfolding this quickly. Celestia sympathised internally. “Luna, it’s okay; whatever is said within these walls, stays within these walls. Come, lie next to me for a moment.”
Luna nodded, and began to occupy the other half of the bed. I always did wonder why she insisted on a double bed in her chambers… I don’t think I’ve ever seen a gentlecolt caller…”
“Well, Tia, I… I wanted to experience this new side of me… and I do not know who else I can trust within the castle. I cannot travel in case my new… ‘equipment’ is observed, and I cannot risk inviting any callers. Besides, it’s not like we haven’t…”
“He was one very lucky stallion, wasn’t he? When I asked him to fix the castle’s plumbing, I don’t think he was quite expecting to fix mine and yours as well that day.”
“So, uh… do you still squirt when you come?” Luna asked, pensively.
“Well, if you want to find out, you know what you have to do.”
Luna sighed, but Celestia was well-trained in her hearing. “Hey, you know the rules we have with our callers; if you want to put your meat in the oven, you need to warm it up first. I’m not about to expect any different treatment from you… even if you are my sister.”
Luna had finally repositioned herself between her sister’s thighs, “I am gratified that this is not… too weird for you, sister.” Luna had rarely had the opportunity to get up close and personal to female genitalia, much preferring a good, hard rutting from one of the stallions she had on speed-dial. Still, she was well-versed in how her own genitalia functioned, and thinking how she would like to be treated, immediately started out with a slow lick, beginning at the bottom of Celestia’s slit, before making its way up to dance on the closed walnut that housed her sister’s clitoris.
Celestia, meanwhile, was starting to think that this wasn’t entirely a bad idea. Used to her own ministrations, she had a difficult time resisting the urge for her hooves to go diving on their own. “Oooh, Lulu… I didn’t know you had this much experience pleasing mares…” Celestia teased.
Luna smiled to herself, and immediately latched on to Celestia’s now-exposed clitoral hood, using her tongue to immediately cause Celestia to sharply inhale, and coo contentedly. I’m actually getting turned on by this. Maybe we should have done this sooner…
The Night Princess was now thoroughly enjoying her oral excursion, her tongue diving deep within her sister as Celestia almost forgot about the main course simmering between her sister’s legs. “Uh, Luna… I think I’m properly warmed up now. Fancy sticking that thing in me?”
“I thought you’d never ask.” Luna scooted up close to her sister. “So, uh, how do we do this? I kind of like to get fucked from behind…”
“I think this position works fine, Lulu. Besides, I want to see that face of yours when you spunk inside me.” Celestia used her rear hooves to good effect, and guided Luna’s new appendage to her pink palace as Luna blushed. “D-do you like dirty talking?”
Luna instinctively pushed the head of her new prick past Celestia’s defenses. “Fuck me, Luna. Make me regret not fucking you sooner.” Luna could feel Celestia’s insides quivering, clearly in as much need of a good screwing as she was herself; precious seconds later her length finally bottomed out, Celestia shivering at the full feeling inside her washed over her like a warm summer wave. Luna’s tip was now brushing against Celestia’s cervix, eliciting a fresh moan and weak thrusts back from Celestia.
Luna was not used to doing the bulk of the work, but the pleasing sensations along her shaft were doing wonders for her motivation as her medial ring was squeezed every time it bumped her sister’s clit.
Celestia had other ideas; long-since used to the idea of being in control, she rolled over to her right, and Luna suddenly found herself on the bottom of this impromptu arrangement. Celestia now started what she enjoyed, bouncing on her partner’s length with renewed gusto, and using a free hoof to gently stroke her clit, running circles around it every time it presented itself. “That’s it, Lulu… fuck me. Fuck me like the needy bitch I am.”
Lulu’s started bucking upwards to meet Celestia’s thrusts, the older sister starting to feel her sister’s length starting to quiver inside her. “Don’t hold back, sister… finish inside me, claim me like the brood mare you’ve always wanted…” Luna wasn’t about to complain as she felt something unexpected; a warm feeling was travelling quickly down the length of her beef bayonet, and her mind suddenly went blank. She felt a compulsion to immediately push her sister even further onto her length, and Celestia immediately felt her womb being stuffed full of her sister’s spunk; it didn’t take long for her continued clitoral stimulation to push her over the edge into a powerful orgasm, now leaning over on a single hoof to steady herself as Luna continued weakly pumping into her. Luna smiled as she noticed her sister squirting with some considerable force, as the wayward fluids began to crust into her matted fur, while excess ejaculate seeped from Celestia as her womb overflowed with the fertile seed of her younger sister.
“… and that’s when I came inside her.”
Nurse Redheart hadn’t expected to feel aroused after such a… graphic description of their ruler being defiled, and by her sister no less. Still, the nurse went down her ticklist, “And was that the only time you’ve been sexually active since your physical change?”
“Well...not quite. See, the next day, this cute purple princess came up to my chambers…”
Redheart smacked her head onto her desk. I’m going to be here all day at this rate...
Author's Note
I got this idea only hours ago, and on a whim, decided to make it into a story. Not necessarily my best work, but I need to get back into the swing of writing stories.
