My Little Pony: Sisterly Convergence

Chapter 7

After a lovely and romantic dinner, Luna and Celestia soon made their way back to their castle and seemingly went back to their individual rooms, as a way to not get the guards suspicious. But as soon as Luna closed her door Celestia immediately appeared in front of her in a bright flash. They both shared a smile, embraced and gave each other a short kiss.

“That was a wonderful dinner sister.” Luna expressed.

“Thank you, and I do hope we can have more like it someday.” Celestia said.

Luna nodded in agreement. “As do I, though we must still be careful and have dinner together only certain days, so nopony will be suspicious,” she stated, seriously.

“Agreed.” Celestia nodded. She then lifted her sister’s chin and smiled. “But now that we’re alone… I can do what I couldn’t do in front of other ponies…”

The two quickly and firmly pressed their lips together and once again, they felt electricity flow through their bodies, and it was enough to make them shake. Their tongues danced inside their mouths while they each let out a moan of pleasure as held each other closer. As their make-out session continued, each of their horns lit up and slowly took off each other’s armor and crown. They also stepped out of the metal slippers on their horns and walked backwards towards Luna’s bed.

Though, before they could go any further, and as much Celestia hated to do it, she broke the kiss and looked Luna in the eye seriously.

“Wait,” she said. “Before anything else happens… I wish to try something.”

“What is it, sister?” Luna inquired.

“Now… it may seem a little strange… but I hope it will pleasure you.” Celestia started to speak very slowly.

“Sister…? Are you alright?” The Princess of the Night questioned sounding concerned.

“Yes, just… let me step back.” Celestia requested as she walked backwards a bit. Luna watched her with a raised brow. “Now… this is not an easy spell to perform, nor do many ponies know about it. They consider it… shall we say… unorthodox.”

“Why would they call it that?” Princess Luna asked her, concern peaking through her voice.

“You’ll see.” Princess Celestia assured her as she closed her eyes and began to concentrate. The tip of her horn glowed and quickly ran all the way down it, lighting up the room a significant amount, much to Luna’s amazement.

Light then began to swirl around Celestia and slowly lift her up into the air, Luna didn’t know what was happening but judging by what she was currently seeing, it was obviously big. Celestia raised her head and took a breath as the lights completely enveloped her in a cocoon of light that slowly got smaller and then…

Flash!

The bright light that emitted from the cocoon of light after it burst briefly blinded Luna. She rubbed her eyes and tried to see if her sister was alright.

“Celestia?”

It took a moment for Luna to regain her vision, but what she saw when it finally came back puzzled her. She looked at her sister, bathed in the pink glow of her spell, which slowly dissipated into the dark of the early evening. There she stood, seemingly all normal, but for one small detail. Or rather, an enormous detail.

Between Celestia’s hind legs dangled a proud and fully erect twelve inch stallionhood. At the base a set of alabaster balls, as big as peaches. A little trickle of pre-cum oozed from the tip and ran along the downside of the cock.

Luna gasped. “Sister, what is the meaning of this?”

Celestia chuckled awkwardly. “Now you see why it’s considered… unorthodox. Basically, it allows same gender partners to mate. Only me and a few other high level unicorns know this spell and it’s one that is very rarely used since… there hasn’t been any… same gender partners like us in a long… long time…” She shuffled and got closer to Luna, who stood frozen in place, eyes focused on the impressive rod of meat between her sister’s legs. “I promise you though, if this is too much for you, there is something I can do about the size.”

Luna shook her head to clear her mind. “How does it feel?” she asked.

“Strange somehow,” Celestia responded. “But not unpleasant. Heavy, yet stimulating. I don’t know, it’s strange.”

“Do you still have your… mare-parts about you?”

“Well, yes, I do.”

A coy smile appeared on Luna’s face. ”Pray tell, sweet sister,” she cooed, “does the possibility exist in which you teach me this spell of yours?”

“Possibly…” Celestia mused, surprised by how interested her sister was. “Why? Do you wish to swap places every once in awhile?”

“Maybe…” Luna smiled a cheeky smile.

“Well… I could… but there is one thing that needs to be considered before we go any further.” Celestia told her.

Luna raised a brow. “One thing?”

“Yes… just one little thing…” The Princess of the Day said before her voice trailed off.

The younger sister waited but noticed that her sister seemed to be afraid to finish her sentence. “What? What is it, Tia?” she asked, concerned.

“Never mind, it can wait, first…” Celestia breathed, “first you need to turn around and put your lovely rump of yours up in the air.”

Luna smiled. “As you wish.”

She slowly turned around, bent down and lifted up her derriere for her big sister to see and admire.

Celestia smiled a bright smile. “Oh my… what a lovely moon, and I don’t just mean the one you raise every night,” she told her, teasingly.

Luna giggled at the compliment. “Why thank you sister, and since it is the Night, which I am the Princess of… I believe I have a little bit more then you do during this time, correct?”

Tia nodded. “You do now.”

“Good.” Luna said, she then turned away and raised her nose up, trying to act as Royal as she could be and made her big sister laugh. “Then as Princess of the Night, I order you to… Kiss. My. Rump.”

Celestia bit her lip as she tried to hold back her excitement and then got her head closer to the Night Princess’ rear. “As you wish, Princess…”

The Princess of the Day leaned her head forward, pressed her lips firmly against her little sister’s rump, she felt her shiver as she made contact and swirled her tongue around the flesh of her buttocks before finally separating, creating an audible ‘popping’ sound that left a wet kiss mark on Luna’s cheek. They both giggled a bit.

“Now that gives new meaning to the term ‘rump-kisser’.” Luna remarked, smiling.

“Indeed it does…” Celestia said, returning her cute little smile. “Now… watch this.”

She lightly put her hooves on both sides of Luna’s flank, gently squeezing her cheeks together before finally leaning forward and licking her right cheek as if it were a lollipop, causing her to gasp sharply. Celestia could actually feel Luna’s whole body shake and tremble as she did so, especially when she started touching her filly parts once again.

“Ah! Ooh! Yes! Yes! That’s it! Keep going sister! Lick me!” Luna cried out.

“You think you’re excited now… just wait,” Celestia smirked as she stepped closer then stood up on her hind legs a bit before lowering herself onto her sister’s back and wrapping her forehooves around her barrel a bit.

Her hind legs set themselves firmly beside Luna’s own hind legs while her new ‘equipment’ pointed itself directly at Luna’s mare parts. The two sister’s moaned as their bodies came into contact. They could feel the heat radiating off each other and Luna rubbed her back against Celestia’s belly as she tried to settle in and handle her sister’s weight while her haunches pressed up against her rear.

The Princess of the Day then whispered in her younger sister’s ear. “Ready?”

Luna nodded. “Ready.”

“Be warned though, this spell not only manipulates a Pony’s privates so that same gender ponies can mate… but it also creates the small possibility that the Pony currently being… rutted… could end up pregnant.”

That caught Luna’s attention as she raised a brow. “Really? Is that so?”

“Yes.” Celestia nodded. “And if it does happen then their might not be any way of hiding it from our subjects. We could become pariahs…”

Luna paused before speaking. “But there’s a chance that it won’t, correct?”

The elder sister nodded again. “Yes, though there’s really no way to be sure until the time comes…”

“Is… there no way to prevent it from happening?”

“There is this one spell that prevents the semen from shooting out. The downside is, there won’t be a cumshot.”

“I guess I can live with that,” Luna said, weighing the arguments. “As long as you finally start drilling, that is.”

A lustful grin spread Celestia’s mouth and she set her horn aglow. The aura wrapped around her stallionhood and quickly disappeared after a few seconds.

“Does it feel different?” Luna asked, neck bent to have a look at her sister.

“Not all too much,” was the response.

“What holds you then?”

“I was wondering too.”

“Then… do it.” Luna declared.

Celestia obeyed her sister’s request and slowly began to push her new member into her sister’s vagina, causing her to gasp sharply as she felt it rub against her walls. Celestia went as slowly as she could, not wanting to hurt her sister, and when she began to close in on her womb she began to pull out which enacted a cry from Luna. She soon thrusted it back in and then out and began humping her sister like a real stallion.

Each time her sister went in and out of her Luna grunted, gasped and panted while the walls inside of her began to tighten around her sister’s new penis.

“Oh sister… you’re so tight!” Celestia moaned, as her thrusts increased and she started to gain even more depth.

Luna moaned as her sister continued to thrust into her, which became harder and harder with each passing second. She could actually feel her sister’s new genital pound against the entrance to her womb and while she knew the magical protection spell her sister casted would prevent impregnation, deep down she actually wanted to have a foal with Celestia. But because her sister was so afraid of the consequences that would come with it she kept it to herself.

Her moans became even louder while Celestia’s new balls slapped against her rear over and over and both her and her sister’s bodies soon became hot and sweaty as they panted and moaned together.

“Oh yes! Yes! Keep going, sister! Keep going!” Luna begged. “Please! Do not stop!”

Celestia had no intention to as she thrusted even harder into her sister, pounding her sister’s bottom with her crotch and making both cheeks ripple and shake.

Luna felt like her whole body was on fire as her sister continued to make love to her. She felt an emptiness when her sister pulled out and then pure joy when she thrusted back in and it was getting her closer and closer to reaching her climax.

“Oh sister… I’m close! Keep going!” she cried.

“Don’t worry! I will!” Celestia responded, loudly. “Oh… I may not be able to ejaculate with this protection spell on… but I still feel close to cumming myself!”

“Oh, by the moon, this is glorious!”

Celestia slammed into Luna as deeply as before, but was now starting to gain speed. Her thrusts picked up a quick pace and the constant wet whap of her artificial balls pounding against Luna’s behind added fuel to her fever.

Relentlessly she drew in and out of her sister’s love cave, until suddenly, she felt a tingling at the base of her dick, then at the tip, until they combined and spread over her whole lower body. Like a wild animal, Celestia fucked Luna until finally they both let out a cry at the top of their lungs while juices began to leak from both of their vagina’s.

They both panted while sweat dripped down their bodies and Celestia slowly pulled her magically created penis out of her sister. Then, in a brief flash, it vanished. Luna noticed this and looked surprised.

“Yes. As you can guess it only lasts until after the deed is done.” Celestia said.

Luna sighed. “Well, it was nice while it lasted…”

“Yes, it was…” Celestia agreed.

A playful smirk appeared on Luna’s face. “Remind me to return the favor soon…”

“You sure you can do it?” Celestia inquired, interested.

“Do not worry about me my love, for I am a fast learner.” Luna assured her.

“Well we’ll see about that my darling sister.” Celestia smiled sweetly before yawning. “Well, it’s late, I suppose we should retire for the evening.”

“I suppose so.” Luna nodded feeling a bit tired herself.

“You don’t mind if I…” Celestia began gesturing to Luna’s bed. Her younger sister quickly understood and smiled.

“Why of course!” she said before her horn started glowing and the bed suddenly increased in length. Now it was able to fit two ponies instead of just one.

“Oh! Impressive.” Celestia complimented.

“Thank you.” Luna smiled as she magically pulled back the covers and began to get in, along with her marefriend. Pretty soon Celestia was spooning her sister and wrapping her forehoof around her, which made her snuggle even closer.

Celestia sighed. “I’m so glad I got to share this experience with you…”

“Me too.” Luna breathed. Her expression then changed to worry. “Still… at times I wonder… what would happen if somepony else found out about… us…”

“Do not worry sister…” Celestia said, soothingly. “Nopony will ever know… and nopony has begun to suspect a thing. They still think we are acting like close sister’s and even if somepony does find out… we’ll deal with it together.”

Luna let her sister’s words sink in and was quickly comforted by them as she smiled peacefully. “I never knew how much I needed you…” she expressed quietly. “Don’t ever leave me. Ok?”

Celestia leaned forward and kissed her sister’s cheek. “I promise… I will never, ever leave you again…” she whispered into her ear.

And with that, the two quickly fell asleep, snuggled tightly together and also having a pleasant time galloping together in the dream realm, not realizing that somepony had figured out their secret. But whether or not she would tell them or anypony else remain unclear… for now.