The copper taste of blood jarred Twilight from her nervous pacing. Lifting her muzzle in shock, she was able to free her tortured lip from her incessant chewing. She rubbed the spot with a hoof while looking out the window of the library. Her alicorn regeneration already made short work of the damaged lip.

“What is keeping her so long?” she asked nopony in particular. When that same nonexistent pony failed to respond, she let her head sink low in defeat. She was tempted to continue pacing in her now quite familiar groove in the floor but a yawn prevented her from pursuing her nervous habit.

“Twi? What are you still doing awake?” called the tired voice of her dragon assistant from his bed at the base of her own.

“Oh nothing, just Celestia was supposed to write to me is all.”

“You're still waiting for that? It's been a week Twi, just write to her and ask about the delay, I’m sure she's just busy or something.” He rubbed his eyes with a claw and rolled back over in his bed. A few moments later and already the content dragon began to snore.

Twilight fumed and snorted angrily before turning away to stare at the distant moon. She wanted to chew out Spike or perhaps lecture him on the importance of patience, but a part of her admitted he was probably right. She was losing sleep, and receiving some kind of word - even if it was just “I am busy” - would set her mind at ease. Admitting defeat, she at last lay down on her bed with a graceless flop, resolving to send a letter asking what was holding up her mistress in the morning.

Her mane covered her face and if she was actually going to try and fall asleep, then she would have to make a better attempt than this graceless pile she had landed in. She grumbled for a few seconds before rolling onto her back. She willed herself to calm down, but her mind was already searching for a reason as to why Celestia was breaking from their tradition. During her studies as Celestia’s faithful student, they had never missed a single weekly get together. Even with Twilight coming to ponyville or the return of Luna or all the other adventures her and her friends had gotten into had never changed their weekly face to face meetings. Not once!

Maybe something had happened? Maybe a new evil had arisen! She began to chew her lip again but spat it back out when she reopened the freshly healed wound. She made a mental note to stop that bad habit, but found that she was succumbing to that same habit while making a mental note about stopping it.

Okay Twilight, she thought to herself. Just breathe and think about this. She may not have written, since my becoming an alicorn just a week ago today but that doesn't mean anything bad has happened. She cast a quick glance at the moon and noted its position, a week ago yesterday she corrected. Maybe there was some kind of protocol now that they were equals.

That drew a stifled giggle from the newest alicorn. Ha, as if. They would never be equals and that was exactly the way Twilight wanted it. Celestia was a god and she was just that, god’s- No, can't go there Twi, I’m not allowed to. She lifted her naughty right hoof that had strayed between her legs and glared at the offending appendage as if demanding an apology. Her hoof lowered another inch before her glare deepened and it returned to her side where it belonged. I wouldn't want to disappoint her.

Twilight rolled onto her side and looked back out the window while her hooves did as they usually did when she was nervous and alone, they ran across the collar around her neck. She felt each bump and ridge along the symbol of her position, feeling the reaffirming shape of Celestia’s cutie mark around her neck. Even the hard metal that made up the collar seemed warm to the touch tonight. It was as if Celestia was reaching out through it just to warm her pet up during a cold and lonely night. Part of Twilight felt a little betrayed; if Celestia was thinking of her why didn't she contact her?

The alicorn curled into a ball and ran her hooves over the necklace again. Feeling every intricate inch from the cutie mark on the front to the rounded edges of the equestrian sky steel that occasionally rubbed against her neck when she walked. She remembered fondly the first time she brought up the tightness.

“Is it supposed to rub all the time? It’s not like I’m complaining or-” A raised white hoof was all it took for a young Twilight to close her mouth securely.

“Of course it is, my pet. It is to remind you who owns you with every step you take.” With each word Celestia took a step closer to the much smaller teenage unicorn. With the room empty, Twilight knew exactly what those steps meant. Every step made her quake in anticipation - her mind already preparing her to do her sworn duty as Celestia’s concubine.

Celestia’s form towered over the small unicorn making Twilight feel small, vulnerable yet incredibly aroused. There she stood for several long seconds before she leaned down and brought her muzzle close to the unicorn’s own. “But you can't be seen wearing it, or I'm afraid I might be asked some rather awkward questions. I would rather keep your service a secret until you realize your destiny and soar.”

Twilight cocked her head slightly. Celestia wasn't the type of pony to say anything flippantly. Every word, every slight difference in inflection had a reason - a point. Why would she say ‘soar’? Twilight shook her head, it wasn't the time or the place for such musings.

A horrible thought occurred to her suddenly, and although it was crazy and Twilight knew it wasn't true, she still took a step back, a hoof clutching the collar resting around her neck. Fear in her eyes that seemed to scream in defiance of any force that would remove her collar. This only made the alicorn laugh, disarming what little remained of the unicorn’s fear. “Don't worry, I have enchanted it to make it invisible to everyone but you and I.”

The alicorn pushed the smaller pony down with a hoof, making the unicorn slip between her towering legs, where the heady smell of Celestia’s arousal assaulted Twilight’s nose. Her back legs began to twitch and rub together, as arousal overcame her as well. Twilight knew exactly what to do and quickly went to work licking the semi hard shaft between the princess's legs. As her licking finally drew the prize she sought from its sheath, the princess smiled and gently began to pet the smaller pony with long caresses of her magic from head to tail.

The unicorn moaned and redoubled her efforts, sucking the tip that had started to emerge while her magic gently massaged the princesses massively swollen balls. If she hadn't been training day in and day out for years she would have no hope of fitting her lips around the massive throbbing form of her princesses’ titanic erection. But Twilight’s private tutelage amongst Celestia’s harem ensured she was able to fit the sun princesses cock into her mouth with ease.

After letting out a low moan the alicorn continued. “Your collar will also serve as a teleportation device if I ever need you by my side. It will warm up quite a bit a few seconds before the spell activates. I wouldn't want to catch you on the toilet, my pet,” she tittered lightly and if the unicorn didn't have a mouth full of alicorn cock at the moment she would have laughed politely as well. “It will also warm up whenever I think of you as well as allow me to send you messages directly if necessary. I expect it to be pristine and polished at all times my little pet.”

Twilight pulled her lips from the alicorn cock that had filled her mouth so utterly she could barely manage to hum with it inside her. “Yes mistress, of course.” She dove back down instantly,swallowing as much delicious alicorn cock as she could manage.

When Twilight asked later in passing about why it would need to heat up when Celestia thought of her, Celestia merely dismissed it as a way of warning her favored concubine of her desire and to prepare to service her. Although Twilight didn't voice any more concerns, curiosity got the better of her and made her mind wander. Why bother with that facet if it had a messaging enchantment already? It was a strangely romantic gesture from the usually stoic princess, one that made Twilight wonder for a long time if Celestia thought of her as more than just her favored concubine.

The pleasant memory gone, Twilight retracted righty who had once more sought the honeypot that Celestia owned. Chastising herself once more, she crossed her hooves in front of her and frowned. This waiting was starting to get to her. She had been hoping for a reward or to be able to at least talk to Celestia again after ascending. But the ensuing week had brought nothing but bills and congratulations from friends and family. While they were welcomingly received, they were simply not what Twilight Sparkle wanted right now.

She rolled over again angrily, thinking to herself once more if she should just go to sleep so that tomorrow would be here faster. Than something startled her from her angry attempts at tossing her bedding all over the room. Her neck was warm, very warm. Celestia was thinking about her right now! Twilight nearly melted into her bed at the confirmation that her mistress was thinking about her - using some of her time to think of somepony as small as her.

A few seconds later she could feel the tight collar constrict slightly before returning to its original size. The alicorn shot out of bed and immediately started going through mental checklist while running to the bathroom.

Nothing in her teeth, check. Mane and tail? She looked them over and silently thanked Celestia that in her angry bed thrashing she hadn't messed up her mane. Smell? She took a big whiff of herself before nodding triumphantly. Check. Unmentionables? She spun around so her back end faced the mirror and quickly raised her tail. Squeaky clean and a little wet. She levitated a towel over and gently ensured she was dry. Check. The lipstick Celestia liked? She quickly drew it out from a drawer and applied it perfectly without even looking in the mirror. Check. The next constriction drew her from her list.

She hastily checked everything else off in her head and trotted back outside. All the while making sure she didn’t alert Spike. She summoned a piece of paper and an ink quill and quickly wrote a note before laying it next to Spike’s still slumbering form.

Dear Spike

Celestia summoned me, but don't worry it's not an emergency. I should be back by the end of the day. If not, make sure to tend to the library. Sorry to leave on such short notice!

P.S: I was saving you a fire opal for later but if you want it, it's hidden in the flour container.

Love

Mom.

Signing her name quickly, she pranced on the spot. Her mind running with what might happen next. Celestia had summoned her finally! But judging from the heat radiating from her collar, something was off. Was something wrong? A third constriction broke her train of thought. On reflex she squared her legs and closed her eyes, relaxing her body completely in the matter of a few heart beats. As an afterthought she gently closed the bathroom door, conscious to not wake up Spike with the ensuring light show.

The magic built slowly within the collar, circling around and around as several balls of white light glowed bright and grew larger with each rotation. Until they were nearly blinding if anyone was foolish enough to look at them. Twilight had felt this magic hundreds of times before, so she neither looked nor flinched. However she did have to resist the urge to begin prancing in place as the excitement nearly overwhelmed her senses.

When she felt the white orbs become a solid tube of white undulating light, her body began to tingle. The priming effects of the teleportation, Twilight realized, since objects that ‘cast’ spells take awhile to both build up and ensure they do not misfire. As a regular spell is in essence guided by the casters intent, and mind enchanted artifacts like this need strict casting ‘rules.’ She mused about maybe taking up enchanting again before she felt the tingly feeling that came with imminent teleportation rush through her.

In the blink of an eye she found herself in Celestia’s private room. She opened her eyes and rubbed the spots out of them quickly. Before she regained the use of her ocular organs, she felt a wing drape across her back. She instantly leaned against it and looked down as she did. Subconsciously submitting herself to the larger alicorn without even having to think about it.

As the last of the stars fled from her eyes, she heard the sultry tone of her mistress mere millimeters from her ear. “Congratulations again, my dear Twilight.” Twilight’s goddess gently nuzzled her, making her knees weak and making a thrill run through her heart. She had only done this a few times in her entire life and the feeling of closeness it granted made her melt.

She blinked a few more times to clear her eyes and looked up to her mentor/goddess/mistress/second mother with awe. The room was sparsely lit but the balcony was open to the bright moonlight that crept in. Twilight gaped unable to speak a word until the older alicorn giggled behind a hoof and gave her flank a smack.

Knowing exactly what she wanted Twilight nodded once and bent down, walking between the elder alicorn’s legs and nearly running face first into her dick. “Oh my princess, you are so hard already.” The enormous alicorn cock that Twilight was intimately familiar with stood at full mast, without any of the usual coaxing she had to do.

Her tongue ran across her lips at the sight and she sucked a stray strand of drool that dribbled from her muzzle. In all the thousands of times Twilight had sucked that glorious alicorn cock it almost always needed some kind of coaxing. Twilight’s eyes looked down to the normally large balls that hung so low they rubbed gently against the princess’ knees. Twilight’s legs nearly buckled at the sight of the massive orbs of flesh. She must not have came since… She did a quick calculation and was startled to realize she must not have came since the last time Twilight had serviced her.

“Ahem.” The elder alicorn’s tone was curt but not without kindness.

Twilight took the cue instantly. “Sorry mistress, you're just so hard and full. I don't even know if I have room for all of that in my stomach. I am sorry in advance if I can't-”

“Now now my pet, pay it no mind. When you get to work I will give you your first lesson on alicorn physiology.” Celestia could feel her pet nod once before diving down onto her cock and swallowing nearly half of it with practiced ease.

Celestia felt the familiar poke of her pet’s horn against her underbelly. Although this would have usually been grounds for punishment the way it just barely brushed her made her laugh. The newest alicorn was clearly unprepared for the extra length of her horn. Pretending not to notice the transgression Celestia merely levitated a ring over and with a master’s ease slid it over Twilight’s horn without having to look at her.

Once secured to the base of her horn the familiar poking disappeared entirely, making her cock sleeve jump in shock. Before she could say anything through the nearly three feet of alicorn cock buried down her throat, Celestia interrupted her. “I noticed you are not used to the length of your horn.” She let the implied threat hang in the air for a few seconds. Enjoying the sensation of the smaller alicorn convulsing in terror at the mere mention. “That is however due to the fact that it is longer and not any fault of your own.” She felt the trembling stop and attention renew on her aching stallionhood. Twilight was just too easy to tease.

Twilight dove down greedily, having just felt the familiar sensation of her throat relaxing enough that she could push the last foot and a half of glorious alicorn cock down her gullet. As she felt the the cock head plow into her stomach her muzzle rested firmly against the base of her mistresses’ pubic mound making her groan in pleasure. Twilight had grown to love these sessions almost more than the pony she was currently deepthroating. So immense was the pleasure radiating off the huge amount of cock resting inside her that she nearly came the instant her lips pressed against the familiar white balls.

Celestia let out a low moan of pleasure, which made Twilight mentally pump a hoof in the air in excitement. She knew she was good, she had blown Celestia every single week, sometimes every single day for nearly 15 years. She knew every intricate detail of that perfect cock down to it's 7 unique veins and nearly 7 inch flare. Just thinking about what was about to come almost made her finish right then and there without even having to touch herself. She held back though using all the mental tricks at her disposal to ensure she didn't cum before Celestia did.

When she felt the rest of her body loosen enough for her to begin to move she relinquished her tongue assault and simply lay it comforting around the bottom of Celestia’s cock. Covering as much flesh as possible to ensure the maximum amount of pleasure. Then when she was sure she was ready, she pulled nearly three quarters the way out and slammed her muzzle back down the length of the cock.

Celestia absolutely loved this part, and the way Twilight could feel her subtly shifting her weight from leg to leg made a familiar sense of pride bloom in her chest. As she repeated the deep pounding of her own face she heard Celestia speak again. With attention only made possible by over a decade of practice, she heard and understood every word while still giving the stallionhood in her throat it's proper attention. She almost giggled at the thought, she must have received at least a couple of dozen lessons while having Celestia’s balls resting against her chin as she furiously attempted to bring her to orgasm.

“The ring should make things easy on you Twilight, make sure you put it on before you get down there next time.” Although the second half of the sentence carried a certain weight that made Twilight squirm the tone implied forgiveness so she tried to make a mental note to not worry.

Celestia did not have to see her concubine’s eyes to know that she must be excited by the reminder that there would be a next time. She was as eager to please as the moment she took her under her wing, and Celestia had been careful to cultivate that feeling for as long as possible. A sudden pressure on her swollen balls drew her from her thoughts and the feelings of pleasure assaulting her mind. “Those are very tender Twilight my dear, I know I usually allow you to play with them however this time I must insist that you do not untill I have had a chance to empty them somewhat.”

The elder alicorn could feel the sadness radiate off her pet in waves before quickly disappearing as Twilight renewed her masterful ministrations on her cock. Celestia let her tongue slip from her mouth when she felt the renewed tightness of her pet’s throat. Pulling her tongue in quickly before anypony could see the shameful act, she reminded herself that with the effort Twilight was putting into her duty that it wouldn't be long and she still had to explain a few things.

Clearing her throat in an effort to bring herself to the task at hoof Celestia pinched herself with her magic after the first attempt failed. “Twilight I must first apologize for not explaining to you why I have not summoned you for the past week.” She knew what Twilight was thinking before it even entered her mind and the next words cut off her train of thought before it could leave the station. “It is no fault of your own but I thought you would appreciate the surprise and you are far too good at reading me to not figure it out before it's ready.”

She could feel Twilight’s head cock slightly at the direction that the one way conversation was going. The furious slurping noises dying down as she tried to ensure she heard every word. Her throat constricted almost painfully around the massive invader and she threw herself utterly into every thrust. Making her lips collide against her the base of Celestia’s cock with enough force to make her enormous balls shake.

“As you have noticed, your own physiology has been changing and will continue to change. However I believe we are at the point that we can do something we have never done before.” Celestia let the tantalizing proposition hang, instead tapping Twilight’s rump slightly.

Knowing this signal meant Celestia was close (and after only 10 minutes, almost a new record!) Twilight pulled out all the stops to please her mistress. She widened her tongue as much as possible and wrapped it tight around the thick cock. All the while she sucked gently and continued to furiously face fuck herself with as much strength as she could muster. Even pushing herself to pull nearly all four feet of cock out of her throat only to slam back down. The entire motion was incredibly tiring and meant that Twilight had to rock back and forth on her hooves using her legs and barrel muscles in tandem to ensure she didn't slip.

The effects were immediate and she could feel Celestia stand slightly taller when her now slightly flared head slammed against the back of her stomach. A few seconds later she felt the double tap signifying her mistress was seconds from cumming. Knowing exactly what to do, twilight cast a quick spell to ensure that breathing was no longer necessary and quickly began to grind her face against her goddess’ crotch. All the while clenching and unclenching her throat rapidly.

After only three more seconds of this she felt Celestia’s powerful balls contract audibly. The sound of her cum churning made Twilight rethink this entire thing, she wasn't quite sure if she had the stomach capacity for one of Celestia’s loads when she was this backed up. Regardless, Celestia thought Twilight was ready and that was all that mattered after all. On instinct she relaxed all her muscles from her lips to her stomach. Ensuring that when the enormous load began traveling down the equally enormous cock that the ensuing bubble of flesh was able to pass without issue.

When she felt the force at which that first wave came down her eyes went wide and a millisecond later she felt the powerful load blast into her stomach with enough strength to make her gag. Which was quite the feat as she has done this more times than she could even count. The next wave was mercifully not as titanic, but it still sent her reeling and her stomach already felt full and distended. But this was just the first two out of a possible forty to eighty. She trusted in her mistress completely and submitted herself without second thought, knowing that Celestia’s words about her safety were absolute truth.

When she felt the fortieth wave of cum splash into her now well distended stomach she felt a tiny ember of worry flare in her chest. Celestia wasn't slowing down, she really hadn't used any of her other concubines. She wondered how big she would get and just how many loads Celestia would make her take.

Feeling her pet’s worry, Celestia hummed and gently pressed her belly against Twilight’s back. The effect was instantaneous - Twilight relaxed and remembered to trust her mistress completely, as she always had. After all she had taken over a hundred at one time before, although that was with her abstaining from food for a while to make room. But still, she could probably do eighty loads without issue.

She took a moment to rub her stomach with a hoof, loving the feeling as her body swelled to accommodate Celestia’s massive amount of cum. Twilight prided herself on her ability to take anything her mistress could dish out and although her pony physiology meant she couldn't have real sex with her mistress, she was determined to make up for that by being the best cock sucker Equestria had ever known. Which if you asked Celestia she was, out of all forty two of her concubines Twilight was the absolute best cock sucker and easily her favorite, never mind she was also the most well used of the bunch. The only other pony who could even claim to reach Twilight’s level of popularity with their princess was a particular earth pony stallion who claims to be the only pony alive to be able to take the full wrath of their princesses’ massive endowment in a hole that wasn't their mouth. A feat that Twilight did everything she could to best.

But up until her ascension there was only one hole of hers that her mistress could use safely. She stopped a second, nearly gagging on the cock still firmly planted in her cum filled stomach. She wasn't just a pony anymore, what does that mean? She felt the ember of worry disappear only to be replaced by a raging flame of hope. She might be able to do it! Finally! She stuffed those thoughts away, they were distracting her from her one true purpose. Pleasing Celestia.

She redoubled her efforts and began massaging the entirety of Celestia’s length with her talented throat muscles. As she felt number seventy hit her stomach, she extended her tongue out of her muzzle and gently lapped at Celestia’s massive basketball sized balls. Teasing out a few last tiny squirts of cum that made her shiver in delight. She loved milking her mistress of every single last drop of cum, it made her feel fulfilled. She would almost have giggled at the little joke she made, had her body not been occupied by Celestia’s endowment. She rubbed her stomach once more, a sense of pride welling within her.

She could probably pass as pregnant with twins and ready to deliver, which did little to stop the well of pride from rising further. Although Twilight couldn't see her stomach, she had been used by Celestia enough to remember exactly how big she got after she had received number seventy four. She rubbed a hoof over her belly to check and smiled a little despite the cock that took up the entirety of her mouth. There was no doubt about it - Celestia had cum more then usual, not since... Twilight paused and thought about it. She wasn't sure, not in a long time anyway.

With Celestia’s orgasm dying down, Twilight was finally able to fill her lungs with new air. She was a master at holding her breath and catching small breaks when she could and had decades of practice having helped to push her limit well beyond the reaches of a normal pony. The little bit of magic she knew to help in that regard extended her limits just long enough to swallow every last drop of Celestia’s seemingly endless orgasm. Which was just another thing she took a small amount of pride in. Beat that, Flash Sentry, you gay bottomless slut and your stupidly massive ass! She stuffed the thought away quickly and returned to serving her mistress, putting the thought of the only other concubine she had ever been jealous of behind her.

Her tongue ran up and down the massive pillar of alicorn flesh still lodged in her throat. Squeezing it slightly to ensure she sucked every last drop of delicious cum that she craved. She had stuffed away the intense longing for Celestia’s cum for a long time and now with it finally fulfilled she allowed herself to relax fully for the first time in what felt like weeks.

Throughout it all Celestia remained stoic and impassive, although the average pony would equate sex with her with sex with a statue Twilight knew better. Due to serving her since she first got her cutie mark she knew every movement and noise that most ponies wouldn't even notice. The slight back step right before she came meant it was a big one. The steady exhale when Twilight really put herself into it meant she did well. The sudden but very tiny inhale when Celestia bottomed out into her student’s belly meant she finally felt relieved. Even the tiny noises she made when she came were not missed by the observant slave. Each one sent a ripple down Twilight’s spine and made her become even wetter. Although she knew better than to fulfill those urges until later. It was one of Celestia’s quirks that she didn't like people cumming without permission and although they could work something out through tapping or grunts Twilight knew she loved hearing her beg to cum far too much to take that away from her mistress.

Twilight felt the cock lodged from lips to stomach slowly soften and allow her to breathe easier. Her heart fell for she always hated this part, for in about thirty seconds Celestia’s cock would finally recede into its sheathe and Twilight would be empty once more until her mistress called upon her services again. She was determined to enjoy the last few seconds of partial fullness that Celestia’s cock provided before she felt it slip out from between her lips and disappear.

She pouted but tried not to let it show while shuffling back and slipping out from between Celestia’s larger legs with practiced ease. Her smile was wide and she stared expectantly up at her mistress.

Celestia herself wore a similar smile only wider still. “I missed you.”

Twilight felt her own hoof press against her heart as if that would stop it from fluttering out of her chest. Remembering herself she bowed slightly. “I missed you very much mistress.” She did another short bow not out of custom but because she was trying to wipe away the blush that had overtaken her face without Celestia seeing.

Celestia merely smiled and beckoned her closer, not with a motion or a sound but just the way she looked at her. Twilight knew. Walking closer she beamed as Celestia leaned down so they were at eye level. Then with a quickness Twilight hadn't seen out of Celestia in years she kissed her lightly on the lips.

It took all of Twilight’s determination not to faint or pass out. The princess, her goddess, her mistress the only pony she could ever truly love had kissed her. She had only ever done that three times in her entire life! Once when she accepted Celestia’s invitation to become her private concubine, a second time when she had graduated (that time only on the cheek because they were in public). With the last kiss delivered in secret a day later after Luna’s redemption at the hooves of Twilight and the element bearers.

But never had she kissed her full on the lips like this! It was always sudden or stolen or when twilight lay exposed. This was almost a kiss of two ponies who were in love- no she can't think that way. She had long since accepted that Celestia could never truly love her the way Twilight loved Celestia. But that kiss. Twilight pressed a hoof to her lips and withdrew it slightly. It was marred somewhat by the black lipstick Celestia liked on her and Celestia’s own pink lipstick she rarely wore.

“P-princess I am not worthy.” Twilight looked up at her mistress with tears at the edge of her eyes.

“Shhh my little pony.” Celestia seemed to slip in next to her without moving, extending a wing over the smaller alicorn. Leaning in close to her pet’s ear she whispered. “You are worthy.”

That time Twilight did faint, the last thing that went through her mind was the fact that she almost came from her princesses’ words alone.

A few minutes later she awoke on heavenly soft bed with something warm behind her and wrapped around her. She looked down to see a massive white cock between her legs and pressing against her belly nearly all the way up to her ribs. Her squishy cum filled belly wrapping around the huge cock somewhat. “Princess?”

The angelic voice of her teacher whispered gently into her ear. “Yes my faithful student?”

Twilight trembled, Celestia rarely used that tone with her and only after a success worthy of celebration. Why then? It didn't matter. Twilight pressed herself up against the fluffy mass behind her and wrapped her hooves around the leg that draped over her side and lay in front of her. Cherishing the closeness immeasurably. Celestia took the hint and wrapped her hooves around her pet and squeezed gently also relishing the soft feeling of fur against her body.

There they lay for many minutes both locked within their own inner thoughts as neither felt like breaking the rare moment of peace they were granted. However with a soft sigh Celestia spoke up. “I didn't properly congratulate you for completing one of the last of my tests and becoming an alicorn.”

“You don't have to do that princess.”

“Oh but I do, for you will always be my personal toy. Now you will be for the rest of eternity.”

“Oh my I oh.” Twilight summoned a fan of magic and pumped it with all her might trying not to faint or continue stammering in the presence of her mistress. “I don't know what to say.”

“Say you will, and that you're happy to do so,” Celestia’s voice was unusual but Twilight didn't think about it. She had insulted her princess by not reaffirming her commitment and she would not let that stand a moment longer.

“Of course my mistress I am yours to use as you see fit forever and ever until the sun burns out,” and she squeezed the leg her forehooves were wrapped around, all the while silently panicking that she didn't pour enough love and devotion into her words.

The room was silent for a moment and Celestia’s body seemed tense although Twilight wasn't sure if this was just in her imagination. After a moment Twilight could feel Celestia’s smile, a true smile given only to her. It radiated a heat all on its own and sent Twilight's heart aflutter once more. “Forgive an old mare for being a worry wart, my dear pet.”

“Of course mistress. Everypony has worries,” Stupid Twilight, Celestia doesn't! She's a goddess and an ancient alicorn!

Instead of mocking the younger alicorn for her choice of words, Celestia laughed. “That is true my student, even I,” and then in a smaller tone barely above a whisper. “But only when it comes to matters of the heart.”

Oh stars above. Twilight was just about ready to explode and she needed to either satisfy her curiosity or the burning between her legs. “What do you mean mistress?” she asked trying to say those five words with innocent curiosity. Celestia could hear the barely contained excitement behind Twilight’s voice.

Maybe I should stop teasing the poor dear. Celestia smiled coyly, thankful that Twilight couldn't see her face right now. “Well, you see my faithful student,” her cadance was longer and each word seemed to have a slight break between it. Within her legs Twilight was about to explode or vibrate out of her grasp. Deciding that she didn't want to see if Twilight would actually explode, Celestia stopped teasing and spoke naturally. “Well first tell me this. Why can't we have sex?”

“You are just too large for the normal pony,” responded Twilight. Although she left something unsaid, Celestia ignored it. Meanwhile Twilight was imagining flicking Flash Sentry and his bottomless ass into the sun.

“Yes, unfortunately there isn't much I can do about that unless there was another alicorn,” she squeezed Twilight for emphasis. “Who wasn't related to me,” she leaned in closer whispering into Twilight’s ear. “Who was magically charged by consuming large amounts of potent alicorn seed from a young age,” she took a long unnecessary breath while Twilight gasped and held her own. “Who was patient enough to do so safely, with whom I could finally copulate with.”

“Are you saying ... that I can? That we could ... we will?” Twilight untangled herself from her mistresses’ legs and looked her dead in the eye with a hunger that Celestia could only describe as manic. “We can do it Princess? We can have sex? Like how normal ponies do?”

That stung the solar princess, but she tried not to show it. Although it was well known that she was well endowed and had a great many concubines to satisfy her, few knew the loneliness of never truly sharing that special moment that a normal mare and stallion could experience.

“It’s not like it's a bad thing, what we do,” Celestia let the tiniest amount of annoyance slip into her gaze, stopping the mare in her tracks. With that accomplished, she returned to her neutral expression.

“Yes, Twilight. We can have real sex now.”

Twilight’s wings pumped without her consent sending her floating above the bed spread, as she did a little happy dance in mid air. She kept muttering praise and thanks over and over, until she realized her princess was looking at her with amusement in her eyes. In an instant, her wings snapped back to her side and she landed with a soft flump against the pillows. Celestia put a hoof to her lips and giggled, amused by her pet’s enthusiasm.

Noticing Twilight was still blushing with that distant stare that meant her mind was running away with her again, Celestia placed a hoof on her shoulder. “But,” That dreadful word drew Twilight’s attention, forcing her to look her mistress in the eye. “If at any point it starts to feel painful or if it turns out you are not ready, we will stop immediately.”

Twilight pouted but admitted to herself that it was fair, for no matter how desperate she was to take her mistresses’ cock she wouldn't want for her goddess to lose a prized concubine. Twilight wrapped a hoof around the princesses’ cock that stood proudly against her stomach at full mast and planted a light kiss on the large head. “I promise, mistress.”

Celestia just smiled and ran a hoof through the younger alicorn mane, ruffling it slightly. “That's my favorite pet.”

They shared a smile for a moment before Twilight understood what it meant, accepting the unspoken command she leaned forward and waited. After a moment that was spent wondering if she misunderstood her mistress, she felt Celestia’s lips against her own. Warm, soft, twin extensions of heaven that came down to caress her own unworthy lips. She felt instantly at home, the relaxation she felt was like nothing she had ever experienced. Like laying down in a warm bed after a long day, her entire body released its tension and relaxed in the presence of its owner.

Twilight felt Celestia’s lips pressing more insistently against her own and she gathered her scattered thoughts and parted her lips, submitting to the older alicorn’s domination. Celestia’s lips spread her own wider, her hooves pulling Twilight’s smaller body in close. Twilight felt the massive cock of her mistress press against her from her hips to her chest, pulsing slightly as they kissed. Celestia’s tongue slipped into Twilight’s mouth igniting an explosion of sensations across the young alicorn. She had never shared this intimacy with Twilight in all her years. Every kiss chaste, every moment of intimacy short. It made her wonder sometimes if she was truly her favorite or if she just said that … but she knew her place and it was not one to question her mistress.

She allowed those thoughts to slowly disappear as Celestia’s tongue caressed her mouth in slow, long motions. Twilight let her body follow Celestia’s meandering pace. Each moment was longer than the last and she seemed to enjoy taking her time. But these moments were not boring in the slightest - it seemed to Twilight that with every flick of her tongue and every motion within her mouth, another part of her body felt as if it was caressed by her goddess’ love. Nerves flared and silenced under the sun goddesses ministrations and her pet twitched and danced under her immaculate touch.

Twilight moaned and only after several long minutes was she able to do anything more than simply follow the lead her mistress set. Unwilling to take the lead in the delicate dance their tongues traced within her, she took to guiding her hooves to where she knew Celestia liked. Two inches below her neck on the right side, Twilight’s touch is soft and gentle. Celestia’s slight twitch in her back left leg tells Twilight what she needs to know. Her hooves next found the sensitive spots just beneath where Celestia’s wings connect with her back. Twilight’s hooves are gentle for an inch, before they press and knead at the sensitive flesh before retreating just as quickly.

Celestia’s pained moan filled Twilight’s mouth and made her eyes flutter open. There in the early morning darkness, Celestia looked back at her with barely constrained lust. Twilight had been taking quite a risk with that particular spot, as a fellow concubine of Celestia’s had told her that it seems to turn Celestia on to such a degree that most concubine’s cannot keep up. But Twilight knew she could, she had taken hundreds if not thousands of Celestia’s loads and served faithfully since she was old enough to wrap her lips around Celestia’s cock. If there was anypony trained and hardy enough to be Celestia’s lover, it was her and only her.

She was ready, and more importantly Celestia was as well. Without speaking a word, Twilight lay face first against the bed and raised her dripping sex up, waiting for Celestia to take her. Twilight lay waiting, ready to be used as Celestia saw fit and to fuck her however she wanted - but what she wasn't ready for was for Celestia to speak up.

“Eager as ever, my little pet,” she giggled and pushed Twilight over, her wings flaring as she tried to catch herself. But celestia’s hoof was insistent and Twilight quickly gave in and let her body fall back to the the bed.

Twilight cocked a curious eye but the second Celestia stood up on the bed and rose to her full height, she took the unspoken command and spread her legs wide. Twilight licked her lips as she watched Celestia saunter over to her, the massive pillar of flesh between her legs slapping her stomach and legs with each step. Twilight’s hoof was tempted to move down to her dripping cunt and mash her clit at the sight of her mistress, but she restrained herself. Instead she looked Celestia in the eye and ran her tongue across her lips while her hoof traced itself slowly down her chest through her fur and across her massive bulging belly to brush against her ample breasts. Although she was no Fluttershy with her massive swinging teets, Twilight was still proud of her ample firm breasts that even now stood nearly straight up.

Celestia’s magic gripped her breasts tightly making a moan slip from Twilight’s lips before she could hold it back. The magic intensified around her nipples, gripping them tighter but not painfully so. The aura kneaded her tender flesh while twisting gently on her nipples. Twilight squirmed and bit down on her bottom lip to keep herself from calling out.

Celestia settled her weight back down on the bed with her head between Twilight’s splayed legs. She breathed deeply and smiled to herself all the while her magic continued its work on her lover’s breasts. Twilight looked down at her mistress questioningly, twisting her head to the side in order to see around her bulging, cum-filled stomach. “You don't have to dirty yourself mistress I am-”

A long lick from base all the way to the top of her well lubed pussy turned whatever she was about to say into a sudden squeal. Celestia seemed to roll the taste around her mouth for a second before swallowing audibly, making a blush surge to Twilight’s cheeks. “You are quite ready, my little pet, but that doesn't mean we can't enjoy ourselves more, hmm?”

“You shouldn't dirty yourself with such things, it's a concubine’s duty to-”

“To what, my little pet? Isn't it to do whatever I would command of her?”

Twilight squeaked and nodded.

“And what if I want to taste my delicious little pet before I mate with her and fill her with my seed?”

A million apologies swirled through her mind and tried to jump out of her mouth. However Celestia’s attention already shifted back down below her sloshing belly and back to her aching pussy. From the lingering look she shot at Twilight, what she had said was an order which Twilight would never in a million years disobey. With the worry and responsibility being lifted from her shoulders, it felt like her heart could not be any lighter. Celestia wanted her! She never did anything like this, not with anypony. Or at least not as far as she knew and she was pretty close to the other concubine’s in Celestia’s harem.

A giggle slipped from Twilight's lips as she felt Celestia’s cold nose brush across her folds. Making her belly jiggle as the copious litres of cum sloshed around inside her stomach. Her giggle morphed into a moan as the weight and heat of Celestia’s cum rushed to the forefront of her mind. With Celestia’s tongue slipping into her dripping sex, Twilight felt confidant that she could let a prideful smile spread across her face, hidden as it was behind her large belly. Twilight relished the feeling of fullness that washed over her almost more than Celestia’s delicate teasing. She was one of the few concubines in Celestia’s service that could take an entire load of hers and come back for seconds, and the youngest to be able to accomplish such a feat. Just thinking back to all those times where she was stuffed full of alicorn cum not having to eat for weeks on end made made her giddy. How many classes had she gone to with her distended stomach full of Celestia’s potent cum?

The gentle twist of her nipples made Twilight’s mind rush back to the now. Celestia seemed to realize this as she dove muzzle first into the mare’s flooded cunt. Twilight grabbed her stomach with one hoof so it didn't shake around too much while the other found itself in her mouth where she bit down on it slightly. It was all too much to take and the waves of pleasure she had been holding back since the moment she tasted Celestia’s cock came rushing back to her.

Frantically she shouted over the coming orgasm, her voice rising several octaves when Celestia’s long tongue pressed firmly against her g spot. “Can I cuuUum mistress?” Every ounce of willpower she could bring to bear was used to hold off the coming wave and she bit down on her hoof as hard as she dared.

Celestia gripped the entirety of Twilight’s delicate breasts and slipped her tongue out of the mare’s honey pot. “Only if you promise to release everything you have been holding back. You always were quite the squirter, little slut.”

Being called a slut was the last straw, Twilight’s hooves wrapped around her belly a second before her orgasm hit. “Oh mistress, oh sweet Celestia,” her words devolved into an indecipherable mess as her orgasm rolled over her.

Celestia meanwhile wrapped her mouth around Twilight’s mound, encompassing the smaller mare’s sex completely. A second later she felt the top of her mouth get sprayed with with a jet of mare cum. She hummed in approval while her cock twitched and ached between her legs. As the second jet of cum splashed against her mouth she extended her tongue into Twilight and thrust it in and out quickly.

The comfortable position that Twilight had managed to find as she rode her orgasm was shattered the instant she felt Celestia’s tongue piston in and out of her. Her hooves slipped from her belly to the mattress freeing her belly to shake and jiggle as her orgasm tapered off. All the while Celestia licked all around the inside of her fellow alicorn, exploring her depths and delicious taste in earnest. Her mood fell somewhat when Twilight finally finished cumming but the fact she had nearly filled Celestia’s mouth with her copious cum far outweighed that thought.

After a few long deep licks ensured that she had gathered every ounce of delicious nectar, she withdrew her tongue. Standing slightly she walked over Twilight who lay wide eyed all the while. Once she stood over the smaller alicorn she swallowed audibly several times.

“Oh, princess,” Twilight’s words failed her as she witnessed the sight of her mistress swallow so much of her cum with such ease.

“Ahh, you are most delicious, my pet. Maybe we should start doing this every morning.”

“Only if you let me suck your cock while you do so,” Her tone was firm, startling both alicorns. Before Twilight could say anything Celestia pressed a hoof to her lips.

“We have a deal,” she said as they both smiled, while Twilight inwardly squeed and Celestia betrayed only the slightest hint of emotion. This only made Twilight smile wider as she caught the subtle way her mentor’s mouth turned up.

Celestia placed her forehooves just under Twilight’s own and her back hooves behind and between Twilight’s. Forcing her back legs apart as she settled her weight down on the smaller alicorn, pinning her in place. “Are you comfortable, my pet?”

Twilight nodded silently, her brain occupied with thinking about Celestia’s engorged cock resting against her cum filled belly. Never mind that the rest of her mistress's’ body pressing against her own nearly made her squee aloud this time. Something about the closeness made her feel better then even the orgasm she had moments before.

Celestia finished shuffling her weight around so she could comfortably lay on the smaller mare. Suddenly, a stern look affixed the younger princess, easily piercing the gloom of the barely illuminated room. “Now, Twilight, I know we talked about this but you’re going to have to promise me that we will take it slowly.”

A yawn suddenly slipped past Twilight’s lips before she had a chance to stop it. “Oh i'm sorry princess, I just woke up really early this morning. It's not like I find you boring.”

Celestia’s said nothing, simply staring as she waited for the younger pony to respond. “Oh um yes, of course, I promise I won't push it and take it as slowly as you want. I am your toy after all and I would never disobey you, mistress,” Twilight could feel a gentle throb pulse between her legs, evidently Celestia had enjoyed that.

Her face displayed hardly any emotion at all, however Twilight knew better. The way her eyes seemed to soften meant she was relaxed and the fact she didn't bring it up again meant she was convinced. With that settled, the alicorn of the sun leaned forward, pressing her lips against her pet’s. They stayed that way for a few moments before Celestia drew back with a wide smile. “Good answer, I would dread hurting you,” the love and affection overflowing from her voice leaving Twilight speechless.

Twilight merely nodded her agreement as she noticed a slight twitch from Celestia’s cheek signalling she felt slightly awkward, so she quickly changed the subject. “I am ready for you to take me whenever you want, mistress. I don't think I could be any wetter,” she didn't laugh this time but her smile did that for her.

Celestia gave her one last short chaste kiss before she gripped her cock in her magic and gently guided it against Twilight’s dripping sex. Mere contact was more than enough to coat the entire head in a glistening sheen. Celestia let out a low sharp breath of anticipation. Twilight ran a hoof across the chest of her mistress, drawing her attention. “I will be okay, princess, I promise.”

Something passed before her mistress's’ eyes but after a second it seemed to pass and with it her trepidation. Nodding once, she gently pushed her hips forward - pressing her enormous head against the tight virgin entrance of her pet. Where it met harsh resistance, despite her gentle pushing, the massive head of her cock could not penetrate her tight entrance. Celestia looked down with despair in her eyes, unsure of what to do. “Please, mistress, I won't break so easily. Take your pet, use me,” the last words barely above a whisper but in the dead silence of the room it was loud with need.

Celestia smiled. “You always were the most eager of my concubines. I should never doubt your conviction.”

“Never, mistress,” was what Twilight was about to say, had not her said mistress gripped the bed and thrust forward hard enough to make the head of her cock slip inside and push her a good few inches up the bed.

Twilight bit her bottom lip hard enough to draw blood, and she closed her eyes, focusing her will to relax and accept her mistresses’ massive cock. After a few tense seconds she could feel herself relaxing.

“Should I pull out, are you hurt?” The genuine concern in the usually stoic princesses’ voice made Twilight’s guilt flare up.

She felt Celestia’s weight slip back slightly. Twilight threw her hoof out against Celestia’s chest stopping her in her tracks. “No please, just wait, I can do this,” the steel in her voice made Celestia pause.

A few seconds later Celestia could feel the vice around her cock slowly loosen, allowing her to breathe normally. Twilight’s breathing finally relaxed and she looked up at her mistress with hope in her eyes. “Ss-see?”

Celestia could see the determination in her eyes but also her pain which she felt as keen as if it were her own. She sighed, Twilight wouldn't give up and as much as it pained for her to admit she didn't want to give up either. She had not been able to have sex like this in over a thousand years and she craved to bottom out inside her pet.

“I have an idea. Do you trust me?” Twilight nodded immediately without a second thought. “Good, light your horn with a spell. Any spell will work so long as it doesn't use much power,” she asked. Noticing the younger alicorn’s horn was alight with power Celestia leaned down and touched it to her own horn.

A brief spark arced between them, then all at once Twilight felt nearly every muscle in her body relax. For a second she thought she was going to pee herself but thankfully those muscles weren't quite as relaxed as the rest of her. A low moan escaped her lips and she felt her body fall against the bed in utter relaxation.

The sudden change made Celestia’s hoof slip and in an effort to catch herself she shifted her hips forward and slipped several inches inside Twilight. Although she caught herself without falling any further the damage was done. Celestia’s eyes whipped back down to see if her favorite toy was hurt, however Twilight looked back with little more then mild annoyance mixed with a heavy dose of arousal. Glad that they were in a better position, Celestia slipped her weight down and settled back on top of her concubine.

With a content sigh she lay her head beside her student’s, attempting to emulate the relaxation Twilight felt. The haze of worry was still prevalent in Celestia’s mind and Twilight could feel her tense muscles pressed against her stomach. She reached a hoof around her princess and gently rubbed her back.

“Have I ever told you how happy you make me?” Twilight’s words came slurred slightly, still recovering from the forced relaxation.

“Only every time we have a private moment, my pet.”

Twilight pouted. “Well it's true you know.”

“I have no doubt of that, little one,” Twilight stopped pouting and seemed to consider Celestia’s words. Celestia meanwhile slowly ground her hips in closer, sliding a few more inches of her massive alicorn cock deeper into her pet.

Twilight squirmed and her hooves grasped at the solar princess until long after she stopped moving.

Settling back into a comfortable spot Celestia glanced at Twilight who appeared deep in thought. “A bit for your thoughts, my dear? Am I not enough to focus on that you must imagine somepony else?”

Twilight shook her head and although the words stung she had heard them before. Although Celestia did not ban her concubines from taking other lovers, it was well known that her favorites didn't remain in her service long after they had taken another lover. Celestia denied it of course, but the stoic princess was an open book in Twilight’s capable hooves.

“You are the only pony I could ever need, mistress,” taking Celestia's chin in her hoof she tilted it up until they met eye to eye. “You know that.”

Celestia took Twilight’s hoof in her own and held it a moment before giving it a gentle squeeze and letting it fall back to the bed. “I know, can you forgive an old mare?”

Before Twilight could answer, Celestia could feel her toy’s pussy loosen enough for her to move once more. Lifting her back legs she shuffled her hips forward a few more inches until she felt it too tight to continue. Twilight let out a moan addled with the slight pain that came with Celestia’s huge cock slipping deeper into her now less than virgin hole.

Once she gathered her bearings once more, Twilight looked back into Celestia’s eyes. Despite the darkness that only a single candle failed to fully illuminate, she found the twin pink orbs of her lover in a heartbeat. “Of course I can,” she bit her lip and held back, almost saying something she would regret. After a moment's more hesitation she spoke it anyway. “If you can forgive me that is.”

Celestia let out a small breath. “Whatever do you mean? You are the most faithful student, and most devout of lovers. Whatever could there be to forgive?”

“I-I.” Twilight bit her lip again, the repetitive action beginning to wear on the bruised flesh. She felt the mixed emotions within Celestia, guilt, paranoia. She had to cut this off quickly and just admit it. “Could you forgive me for… loving you?”

Celestia relaxed instantly, the flood of emotions leaving her behind to try and figure out what to say. Without direction she returned to a stock response she didn't even think of before she spoke. “All my little ponies love me, of course I forgive you.”

Twilight wiggled her hips, slipping a little more of Celestia’s cock inside her. “I know you haven’t given your heart to another pony in a long time and that's okay if you don't return my feelings, I just wanted you to know how much I love you.”

Celestia made a face Twilight could only describe as odd. It looked like genuine concern, love, and annoyance rolled into a single expression. After a fitful second the princess just laughed.

“What's so-” an alabaster hoof kept her mouth closed.

After a few more seconds of laughter the princess of the sun just smiled. “I have had many ponies confess their feelings to me but never while we are in the middle of making love.”

Twilight’s face became two shades brighter and she brought a hoof to her face. “Fine, I forgive you for that but only if,” Celestia held a hoof above her head dramatically. “You forgive me for loving you back.”

Celestia looked down expecting a cute expression however all that was there was annoyance. “Kiss me already,.” Twilight demanded.

She had no choice but to obey, for the first time in their relationship the roles were reversed, if only for a moment. After a long and gentle embrace they parted, gasping for breath. Twilight put a hoof to her head. “Wow, you’re a good kisser. I mean you're the only pony I have ever kissed, but wow.”

Celestia merely smiled and wiggled her hips, drawing both of their intention down to her stomach. Bulging as it was from Celestia’s previous load, a distinct outline could be seen in the shape of Celestia’s cock. Twilight poked it with a hoof. “That shouldn't be possible,” she poked it again, it was nearly in her rib cage. “How?”

Celestia pressed the last few inches of her cock inside, easily slipping into the younger alicorn’s womb with surprising ease. Her heavy balls pressed against twilight’s drooling pussy. If that wasn't enough she could feel Celestia’s head slowly flare within her womb, locking them together. The moan that had come from her mouth lasted a full minute without pause, finally petered out and only with the flash of an energize spell was she able to keep herself from falling asleep in the haze of post coital bliss. Twilight decided then and there that this was far more pleasure than anypony was designed to experience in their lifetime.

“Are you alright, Twilight?” Twilight’s slight nod eased Celestia’s beating heart and allowed her to once more relax on top of her favored pet. “And to answer how, well you're an alicorn female - you’re designed for this to happen … while I must admit I helped the process along by feeding you a steady diet of cum since you first caught my eye the day you earned your cutie mark. It's mostly your new biology doing the heavy lifting.”

Twilight mulled it over and although she had always assumed drinking and eating nothing but alicorn cum for almost two decades would have side effects, she didn't think it would be this. “Ooooh, my gosh,” a ripple of pleasure reminded Twilight that there was a three and a half foot long cock still buried inside of her.

And yet still a yawn escaped her lips. She was trapped between her intense desire to please her mistress and the tug of slumber. Celestia seemed to pick up on this immediately. “Do not worry, my dear Twilight, sleep now and worry not. Alicorn mating can last days.”

The thought alone nearly made the young alicorn cum, but a third yawn escaped her lips and drowned that thought out. “Are you sure? Are you going to pull out?” The words were said with such sorrow that Celestia responded instantly.

“No no, I couldn't even if I wanted to,” Celestia laid her head down next to her mate and let her weight settle completely. Which surprised twilight as she was lighter than anticipated. Tugging a blanket over them and banishing the mess they had made earlier, between Twilight’s copious cum and their combined perspiration to the moon Celestia relaxed completely. “Besides, a little sleep would do us good. Are you comfortable?”

Twilight moved her head left and right trying to find a spot to work the kink out of her neck but a pillow slipping behind her head laid that thought to rest. “Thank you, mistress.”

Celestia looked Twilight up and down and fidgeted with a few feathers the alicorn could see were out of place, before giving up and laying back down.

“Just one little question. How can i even fall asleep? I mean your still inside me.”

Celestia rolled her eyes, thankful that Twilight couldn't see her face. “When I said we alicorns mate for days, I wasn't joking. Although the exact nature of our physiology is unknown, what I do know is that that this is completely safe and is a particular favorite of mine”

Although Twilight clearly had more questions, another pesky yawn banished those thoughts as well. Instead she merely mulled them over and admitted defeat. If it was Celestia’s favorite part then that was good enough for her. “Good night, mistress.”

“Good night, my pet.”

Author's Note

A special thanks to Dio and his partner in crime (link to be added shortly)