My Little Pony: Sisterly Convergence

Chapter 9

A week had passed since Cadance discovered her aunt’s secret and upon agreeing to keep it her secret, things returned to normal in Canterlot Castle. Well… as normal as things could be. The idea of marriage that their niece offered to them did intrigue the sisters a bit, however they knew that the law against it was strong and they were settled with the never ending cycle of day and night and the symbolism that came with it so ultimately they decided against it.

As the days passed, the two sisters became more and more adventurous in their sexual escapades. Making love in various spots all over the castle and not just in their bedroom’s. Because they were rarely caught, the two slowly started to get more cocky, believing that their secret would remain between themselves and their niece alone.

Little did they know that in one moment, very soon… their whole fortune would tip.

It was an average day at Canterlot Castle. The sun was up, the birds were singing once more. The only thing that was amiss was that the two Princesses were seemingly nowhere to be found and the Royal Guard was searching high and low for them but with little to no luck.

Two of them soon met up at the front of the castle.

“Any sign of them?” The first one inquired.

“Negative.” The other replied.

“Where could they be?” The first guard wondered out loud.

“I do not know, they have been behaving quite strange as of late, but regardless we must find them; quickly.” The second guard stated. “Before the subjects begin to ask questions. The Princesses… mean everything to them.”

“Indeed. They are ponies to be admired.”

“Yes. Which is why we must find them. At once!”

“Yes, sir!” The guard saluted before they both separated.

Little did they know, that they were actually closer than they thought. More specifically in the castle garden, where all the many animals that lived there were hiding in the bushes, shaking and watching as the two currently missing Princesses were both on top of each other and engaged in a make-out session. Their tongues swirled around each other over and over while they exchanged saliva.

While they were kissing, some worried thoughts began to pop up in Luna’s head. She spoke during the short breaks they took while taking a breath.

“Sister… are you sure this is…” she began.

“Yes!” Celestia expressed as she started kissing Luna again, only for her younger sister to break it, briefly though.

“But what if we…” Luna started to say, concerned that somepony might walk in on them.

“Oh, we won’t!” Celestia assured her, eager to continue locking lips with her sister.

As they kept on making out, their mare parts began to rub against each other every few seconds or so, causing them both to heat up and get sexually excited. Eventually, the lower halves of their body became so hot that they ceased kissing, stared into each other’s eyes and panted.

“Sister…” Luna breathed.

“Yes, my darling?” Celestia inquired.

“I think… I think I’m ready to try it now…” Luna revealed.

“You’re ready to try that spell?” Celestia asked, a bit surprised.

“Yes!” Luna expressed. “Please… let me rut you… like how you rutted me!”

Celestia contemplated it for bit, on one hoof she was concerned that her sister may or may not use the safety spell in order to prevent impregnation, but on the other hoof she was excited by the idea of having her sister’s own penis inside of her, so much so that she went with the latter right away.

“Alright, let’s do it,” she said.

“Yes!” Luna quietly cheered to herself as she got off her sister and helped her back up also before stepping back, preparing to perform the spell. She took a breath and sighed. “Ok… here I go…”

The tip of her horn glowed and quickly ran all the way down it, lighting up the area. Celestia closed her eyes as this happened, so that she would not be blinded while excitement built up inside her.

Like her sister, light then began to swirl around Luna and slowly lift her up into the air, Luna 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!

As soon as the spell was over and the bright light finally faded, Celestia opened her eyes and gazed upon her sister, who looked slightly weakened from using such a high level spell but what she saw between her legs more than proved that she managed to pull it off.

“Well…? Did it work?” she asked, feeling strange.

Celestia smiled. “Oh, I am fairly certain that it did,” she said as she pointed below her.

Luna looked down and gasped when she finally saw it; an erect, dark blue piece of stallionhood and balls that was as long as the one she had more than a week ago.

“I-I did it! I have a stallion’s genitals!” Luna expressed, happily.

“Yes, and now you can feel the joy I felt when I mated with you.” Celestia declared, proudly before she turned around and pointed her flank in Luna’s general direction. “So, what are you waiting for? Mount me, my love.”

Luna smiled brightly, then as she approached her sister she smirked whilst staring at her rather big behind.

“Hmm, your royal bottom has gotten bigger by the way. Have you been eating cake?” She teased as she turned to Celestia flirtatiously.

Celestia blushed bright red as she turned to Luna. “I… I… get cravings!” she said, hoping she would believe it. Luna simply smiled.

“I only mean that it looks like it’s gotten softer and more succulent… now there’s much more to love!” Luna beamed.

“Oh Luna, you are such a tease!” Celestia said, amused.

The Princess of the Night then reared up a bit, placed her hooves on her sister’s royal tush and began to rub it playfully. Celestia shuddered as her hooves rubbed her rear in circles, ebbing and molding it over and over, causing the Sun Princess great pleasure. Luna then giggled like a little filly.

“So squishy and soft… like balls of clay…” she remarked.

“Oh sister… stop teasing me… just do it!” Celestia practically cried out, already beginning to feel wet and excited.

“Very well…” Luna cooed as she pulled herself further up and laid her belly halfway across her sister’s back, whilst keeping her forelegs around her sides and lining up her new penis with her sister’s dripping entrance. Celestia turned and gazed at her sister before they both shared a smile.

“Dare I?” Luna inquired, suggestively.

Celestia faced forward, looking determined. “Do it.”

Heeding her sister’s wish, Luna thrusted her lower body forward and plunged her new member into her sister’s vagina, causing her to cry out as he rubbed her walls. She felt it pull out slowly, leaving her wet and wanting more until the next thrust came, which was even faster, making her grunt. This quickly became a pattern as Luna began to thrust in and out of her sister every few seconds and made her grunt each time, just like Celestia did for her.

As she felt her sister’s inner walls clench around her hard flesh, Luna increased in speed, wanting the feeling to grow; this urging, tingling feeling right at the tip. She huffed as she felt Celestia’s love cave becoming tighter all off a sudden and tapped her on the back.

“Sister, what are you doing?” Celestia asked.

“You mean this?” Luna moaned of the sudden tightness around her new accessory. “I have acquired knowledge about something fantastic. Did you know that mares are able to control the muscles inside our vaginas? Look.” Again, the flesh clenched around Luna’s meat rod, making her squeal in pleasure.

“That is… truly fantastic,” she said, panting, a deep dark crimson blush all over her sweaty face.

“Yes, it is…” Celestia agreed, blushing as well. “And the fact that we’re doing it in a public place makes it even more exciting, does it not?”

“You have no idea how right you are, dear sister…” Luna expressed.

She picked up the pace again, shoving her stallionhood to the medial ring into Celestia’s delectable pussy. So good it was, Luna almost felt like she would get sucked in, which sparked a feral instinct in her and she began driving her cock ever deeper.

As Luna’s length ventured deeper, Celestia bolted forward as the tip reached her most deepest part. She squealed and made for a jump, but Luna’s hooves had clutched her firmly and were drawing her back onto Luna’s loins, impaling her on the rock hard stallionhood.

“Oh Luna… I’m getting close…” Celestia breathed.

“As am I…” Suddenly, Luna perked up her head. “Oh! I have an idea! Sister, turn around, I want to see your beautiful face as we cum together,” Luna huffed, her eyes shining with lust.

Celestia bent her neck over and placed a kiss on Luna’s lips as she herself reached out. “That is a wonderful idea, my dear.”

“Then let’s do it.” Luna declared. “First; lay down.”

Celestia nodded as she bent all four of her knees as she lowered herself to the grassy ground. Using both her hoofs, Luna began to turn her sister over, all while keeping her stallionhood inside of her. Both sisters moaned as the penus moved all around inside of Celestia in a complete circle. Once it was done, both of the two sisters stared into each other’s eyes, smiled and resumed their earlier make out session, whilst Luna continued to thrust into her sister’s now very tight vagina.

When they ceased kissing, their cries soon became louder and louder as each of them neared their climax. While she was thrusting, Luna began to wonder if she used that ‘magical condom’ spell on her new penis before she began but she quickly figured that she probably did and continued on.

“Oh… Oh! Luna! I’m close!” Celestia exclaimed.

“Oh… me too!” Luna yelled.

“L-Look… look into my eyes sister…” Celestia panted. “Let me see your face when we cum together…”

“Ok…” Luna breathed as she and her older sister locked eyes with each other while their hearts beat faster than ever before. “Oh Tia… you are so beautiful… if it were possible… I would ask you to marry me right here and now…”

“As would I…” Celestia confessed, lovingly. “Now… finish inside me!”

“Ok!” The Princess of the Night said, as she pounded against her sister even harder and even faster. Pretty soon, juices were beginning to leak out of Celestia’s entrance, and as they panted feverishly they both felt their climax’s nearing. “Oh sister… here it comes… here it comes! Here--”

Before Luna could finish and ejaculate inside her sister, a voice from close by spoke up, catching them both by surprise.

“Uh… your majesties?”

Celestia and Luna's eyes widened as they gasped and quickly turned to their side where they spotted the castle gardener standing, and presumably watching, just a few feet away.

“Mr. Greenhooves!” Celestia said, fearfully.

“Oh no…” Luna muttered under her breath, fearfully. They were caught in the act! Now their reputations would be forever ruined… Luna shivered, looking scared until she heard…

“What are you doing on top of your sister there, Luna?” The old pony inquired, he didn’t seem to get what they were really doing, nor see the Night Princess’ new member, which gave them a small chance to come up with something…

“Uh… we were just…” Luna started to say as she tried to come up with a good lie.

“Playing.” Celestia finished, quickly. “Yes… we were… just playing… like when we were fillies.”

Celestia put on an innocent smile, while Luna smiled a guilty one and after a moment of pondering Mr. Greenhooves seemed to buy it and smiled also.

“Ok! Well, you kids have fun!” he told them as he waved before leaving. The two Princess sighed in relief once he was finally out of earshot.

“That was close!” Luna expressed, before a cocky grin appeared on her face. “But it appears that we can truly ‘do it’ anywhere and not get caught!”

“It would seem so.” Celestia agreed. “Now please… finish inside me! All this waiting… it’s driving me crazy!”

“Very well!” Luna declared as she picked up where she left off and sure enough they became close to climaxing again.

They panted heavily as the thrusts increased in speed until finally… they finally reached their goal and let out a long scream as they came together.

Far off, Mr. Greenhooves could hear their scream as clear as day. While he was a bit surprised at first, he soon settled into a smile and a chuckle. “Boy, sure must be a fun game that they’re playing… wonder if my brother would be up to playing something like that?” he wondered out loud as he continued on his way.