Celestia slowly woke up, licking her lips in a satisfied sort of way as she used her magic to raise the sun. She purred a bit as she rubbed her haunches together, slowly becoming aware of the fiery burning sensation in her nethers. Wait she thought, burning sensation? She quickly looked between her legs, and her eyes widened at what she saw. She quickly slammed her legs together, moaning a bit due to the motion, and quickly began casting magic to seal her private bedchambers. She was halfway through coming up with an explanation for Twilight when she stopped, her mind halting on the image of Twilight.

Her eyes widened and her mouth began to drool, her new carnal desires making themselves heard as the heat in her loins flared again. She had experienced heat before, and from everything she knew about the experience hers was worse than a normal pony's, from everything she could deduce it was because of her connection to the sun. Of course it hadn’t ever really been a problem, having never experienced sex before Twilight she had been able to restrain and lock herself up to keep the populace safe while she sweated it out for the entire month she was in heat. But now she had Twilight, and she knew of the carnal pleasures, thus she knew there was no way in Tartarus that she was going to be able to keep herself sane without relief. So she did the only sensible thing she could think of, and quickly penned a letter to “Teacher”.

* * *

Twilight put another book on its shelf, smiling to herself as she thought back over the magical week she had with her “Student”. After they had left the sex shop, they had gone back to Celestia’s room, and then Twilight had proceeded to teach Celestia all about her sexual kinks, as well as help Celestia discover her own. They had discovered through this that Celestia had strong submissive tendencies when it came to sex, so submissive that Twilight had her groveling on the floor at her hooves at one point.

She grinned broadly at that particular memory, rubbing her hind legs together in appreciation of the response her body was having due to the memory. That had been a wild night, both of them satisfying each other in every way possible. She had even taught the princess the futa spell; though by the end of it they both agreed that they preferred it the other way around, which was no big deal when Twilight thought about it.

Twilight had also gone out of her way to teach her student about her own sexual habits, one in particular which had surprised the regal monarch to great effect. Twilight loved doing sex related activities in public, and had wasted not time in telling the princess about all the times she had a dildo shoved in her crotch during her lessons, and for dramatic effect had pulled out the dildo she had inside her while speaking to her.

“Twilight” called a voice from downstairs, causing her to jump in surprise and quickly return to what she was doing.

“Yes Spike,” she asked, using her magic to remove the evidence of her arousal.

“You got a letter from the princess, and it has that seal you told me to watch out for, the ones I’m not supposed to…”

In a flash Twilight was beside him, ripping the letter out of his hand and pushing him towards the door. “Thank you for bringing me this Spike, now why don’t you run along and get yourself some gems as a reward okay.”

“Ok ok, I know when I’m not wanted around,” said the dragon. However when he reached the door he stopped and turned back towards Twilight; a questioning gaze upon his face. “Twilight, when are you gonna tell me about what happened between you and Celestia last week?”

“When your older Spike, now get going.” she watched the dragon leave, using her magic to lock the door and then she tore off the seal, opening the letter with an eager smile on her face.

To my most Naughty Miss Sparkle

Your faithful student in the carnal pleasures asks that you take a break to come see her in her private chambers, I have a surprise for you that will leave you speechless, just make sure to bring lots of lotion and that special horn dampener you made.

Faithfully, your naughty student.

Celestia Ordea

Twilight grinned as she summoned the supplies to her, leaving a quick note to Spike and then teleporting outside the princess’s room. She opened the doors, walking in and calling out to her student with a saucy grin. As soon as the call left her lips the doors slammed shut, and there was a very pronounced purr as she heard the doors magically lock behind her. “Clever girl,” she said before being tackled by the princess and rolled into the bed. The princess pecked her mercilessly with kisses along her whole body, causing her to moan and giggle. “Well well, somepony is active today,” said Twilight, giggling as she felt the princess use her magic to endow her. “If I didn’t know any…AHH…better, I would say you…were…in…”

Twilight sat bolt upright in the bed, pushing the princess away from her swelling member and backing up along the bed, then scent of arousal invading her nostrils. “Celestia, you’re…you’re in heat!”

“Yes” purred the princess, crawling along her belly toward Twilight, “I am in heat, my beautiful mare.”

“But…but how is this possible, I mean you’re a goddess, shouldn’t you be above such mortal inconveniences?”

“No Twilight, we are as susceptible as you to the effects of estrus. I have been able to resist the urges in the past because I had never experienced sex before. But then you came into my life, and you showed me the beauty of my carnal desires, so please-” she said, her voice dripping with desire as she rubbed her face along Twilight’s stiffened pride. “-can you give your student the relief she so desperately craves?”

“But…but princess…” said Twilight, suppressing a moan as she felt Celestia’s lips graze against her member. “If…if you're in heat…wont…wont me mating with you make you pregnant?”

Celestia chuckled, dragging her tongue along Twilight’s length before looking back up at her. “My dear teacher, that is quite impossible in your current state.”

“Wha…what do you mean princess,” asked Twilight, noting the hint of curiosity in her voice.

Celestia chuckled again, rubbing her face once again on Twilight’s impressive stallionhood. “Divine alicorns such as myself can not get impregnated by normal ponies without magic from said divine alicorns.” She took her time licking a generous amount of pre-cum from Twilights member, moaning as she took in the taste.

“Re…really, that sounds…hah…interesting,” said Twilight, her magic flowing from her horn and gently massaging her student's lower lips as the pleasure finally started to override her worried brain. “I…I suppose there is a book that explains all this right?”

Celestia moaned as Twilights magic rubbed against her, breaths coming in heavy pants due to the repressed urges screaming at her to tackle the endowed mare. “Yes” she moaned, “There is such a book, but for now please…help relieve your precious student of her needs…I can’t bare this torture much longer.”

That was all Twilight needed to hear, “Very well, you may turn around my faithful student.” she watched as Celestia nodded, turning herself around and presenting her royal rump to Twilight.

* * *

They had been going at it for days, both lost in each others bodies as the scent of heat drove them ever onward. The first day Twilight had protested, but had been too tired to try and escape when lunch had been served. By the time dinner had rolled around, Twilight had stopped caring about escape. Nothing mattered to Twilight now, nothing except the feeling of her member sliding in and out of her mare, the loud smack of their hips connecting with each thrust, and the occasional gush of fluids as they occasionally orgasmed due to their pleasure.

Celestia herself was awash in the effects the heat was having on her sexual experience, each sensation driving her completely wild as Twilight kept moving in and out of her. Nothing would break her from this moment of unending pleasure, save for her niece walking into the room…wait.

Celestia opened her eyes wide, seeing Princess Mi Amore Cadenza standing halfway in the room, a look of utter shock and horror on her face. She also became aware of the fact that Twilight had stopped rutting her, which meant that this was no hallucination she was experiencing, which she was both happy and miffed about.

“I…ah…wha…,” stuttered Cadance, her eyes looking up to Twilight and back down to Celestia, disbelief etched into her very being.

“Cadance, I know this is probably the last thing you want to here right now-” said Celestia, “-but this is exactly what it looks like.”

* * *

Cadance paced back and forth across the floor, fuming as she kept her gaze held straight in front of her. Celestia and Twilight sat at the edge of the bed; both keeping their forehooves in front of their crotches to hide the most glaring evidence to their recent activities.

“I cannot believe you two!” yelled Cadance, finally turning her burning gaze on them. “Do either of you realize the implications of what you to have done-”

“Um…don’t you mean what we have been doing…” said Twilight sheepishly.

“WHAT!” yelled Cadance, rounding on Twilight.

“Well-” started Celestia, drawing the angry gaze toward her, “-this wasn’t exactly…our first time…”

Cadance looked livid, “how long?”

Twilight and Celestia exchanged glances, Twilight counting the numbers in her head. “Um, at this point I would say…a month and change?”

Cadance’s eyes widened, “a…a month!” she sat down, putting her face in her hooves. “By the moon what were you two even thinking? Do you two realize the fucking trouble this could cause, they already think you molested her when she was a filly, “Princess Molestia” they called you.”

“What! I never did any molesting of the kind. The only thing I ever did when she was young was wash her and maybe look at her flank a couple of times.”

Twilight gave her a look and she sighed, “Twilight I was a thousand plus year old virgin, and you were the only pony I liked who ever sent the kind of signals I was looking for, though I always just attributed it to accident when you were younger.”

“Not really, my parents kind of went overboard with the birds and the bees discussion when I was younger, so I was pretty sexually aware by the time I came under your tutorship.”

“Will you two focus for a second!” yelled Cadance, drawing their attention. “This is a serious matter; how the hay do you think the populace will think once they find out that you having sexual relations with your student!”

“Cadance-” said Twilight with a slight giggle, “-you do realize who you’re talking to right. Tia and I have taken every…”

“Hold on a sec…did…did you just call Celestia…Tia?”

Twilight blushed, nodding her head. “Ye…yeah I did.”

Celestia leaned herself against the young mare, tenderly caressing the mare with her wind and kissing her on the cheek. As much as Cadance hated to admit it, she could see the love between them, and she sighed with frustration. “I don’t know what in Tartarus caused this to happen, but I know love when I see it…just tell me one thing…does anypony else besides me know about your…relationship?”

“Well, we did have to tell the guards after they burst in on me um…I can’t really tell you that, just know that the guards know about us.”

“And don’t forget the Wonderbolts dear,” said Celestia.

“Oh yeah…them…”

“Ok I know I am going to regret this but what happened with you and the Wonderbolts?”

“We…well you see-” started Twilight, “Celestia and I were out on the town a few nights ago, she was disguised as Sunbeam of course, and we may have gotten a bit tipsy and we wound up…um…in bed with Spitfire and Soarin.”

Cadance just stared at them in disbelief, face hoofing herself. “Of all the…you slept with the captain of the WONDERBOLTS!”

“Um…yes…I mean from what I remember it wasn’t all bad…”

“I don’t know Twi; I would have been perfectly fine with it if Spitfire hadn’t asked us to join them in a herd marriage.”

“You…you said no right?”

“Oh course we said no, it just would have cause to many problems. Um…Twilight-” said Celestia, looking toward her. “Do you mind heading into the bathroom for a moment, there is something I need to talk with Cadance about alone.”

Twilight nodded, getting up and quickly making her way into the bathroom, closing the door behind her. Celestia turned to Cadance, getting up and walking up to her niece.

“Cadance, I know you may not approve of our relationship, but it has been the best thing to happen to me in a long long time, so I am going to give you some advice.” she breathed a deep sigh, giving Cadance a knowing look. “I know you have a crush on Twilight's brother Shining.”

“What! Where did you here that! Who told you!” said a startled Cadance, before Celestia put a hoof over her mouth.

“No one told me, I figured it out due to the way you look at him, it's the same way I look at Twilight. It's…it's actually because of you that I was able to buck up the courage to show Twilight how I feel about her. So please, show me you posses the same courage and show him how you feel, I know he feels the same for you, he just doesn’t know it yet.”

“But…But…”

“Cadance it will be alright, trust in yourself, and just follow your heart. But before you go, I want to give you something.”

Cadance watched as Celestia walked over to the bed, opening up a drawer and pulling out a set of regalia that she had never seen before. “These regalia belonged to your mother Marmora; I kept them here for you…for when you got older.”

Cadance was rendered speechless, watching silently as Celestia walked up to her with them. “May I,” she asked, holding the regalia before her. Cadance nodded, turning around and allowing her aunt to put the regalia on. After she was finished Cadance turned back around, watching a tear slowly run down her aunt’s cheek.

“You look so much like her,” said Celestia, brushing a hoof through Cadance’s mane before the young alicorn grabbed her in a fierce hug. She felt Cadance shake as she sobbed, feeling tears fall upon her white coat as Cadance cried.

“I miss her…so much…” sobbed Cadance.

“I know…I miss her too,” said Celestia with a repressed sob, hugging her niece close. After the long hug they broke apart, Celestia playfully pushing her towards the door. “Go, you got a knight in shining armor to court. And Cadance-” she said, catching the mares attention before she left out the door. “-Your mother would be proud of you.”

Cadance smiled, and then she left, closing the door behind her.

Author's Note

Few this chapter took forever. I know I had promised a clop free chapter next, and I sorta accomplished that right......? ah who am I kidding this thing was a depraved as the last few chapters......and then it turned serious? wow what is wrong with me. Anywho hooray for Cadance making her first appearance, as always if you guys have any questions or comments feel free to drop them on by, I love hearing what you guys think.

P.S. I hope you all love the who teacher student switcharoo I did in this chapter, having the princess address Twilight as Teacher and Twilight address Celestia as Student, I particularly enjoyed it, though I wonder....It would be awesome to create a tumbler around these two....Miss Sparkle and her Submissive Student Celestia, anyways tell me what you think.