Author's Note

The story is fucked up in every way, my advice is to turn back now before you read this.

The only one

The sound of chains rattling echoed throughout the room. Restrained physically and blindfolded, Celestia was held above a small table as she struggled to escape her bindings.

Luna sat watching the futile escape attempts, a wry grin on her face as she fed their newborn daughter from her teat, the light blue alicorn filly feasting hungrily from her mother.

A shiver of excitement passed through Luna's spine at the thought of what she was about to do, shaft standing proudly and hard as diamonds as she prepared to enact her plan.

Removing the feeding foal from her teats, she stood and cradled her close with a forehoof as she walked over to her bound sister, hoofsteps echoing in the near silence.

Upon arriving where Celestia was bound, Celestia ceased her struggles as she heard the approach.
"Who's there?"
Celestia called out into the room as Luna placed their foal beneath her sister on the table, a jet of precum firing from her cock at what she was about to make happen.

Leaning in to whisper in her sisters ear Luna spoke up for the first time.
"Hello dear sister"
she intoned with a sultry growl.
"Luna?"
Celestia replied, confusion evident in her voice.
"Where are we? Why am I restrained like this?"
She continued with a questioning tone.

"All in good time, dear sister"
Luna replied in a singsong voice, hoof slowly sneaking downwards towards her sister's groin, lightly stroking her sheath to coax forth her penis in preparation for her planned entertainment.

Celestia let out a muffled groan of pleasure at the touch of her sister, the blindfold heightening her sense of touch, the unexpected caresses of her sister quickly causing her shaft to unsheath, the large sceptre bending down towards the table before coming to rest lightly on something incredibly soft, moving slightly as if in discomfort.

"L..Luna"
Celestia whimpered nervously.
"What's that?"
She continued

Biting her lip at the sight before her as her shaft fired off another blast of pre onto the floor before she responded.
"That"
Luna panted lightly in anticipation
"Is our beautiful daughter"
Luna concluded as the aforementioned foal wriggled around some more, unknowingly stimulating the shaft of her father and drawing forth a drop of precum from Celestia's shaft.

"Luna, what are you doing?"
Exclaimed the now startled Celestia, struggling to not take pleasure from what she now knew to be her newborn daughter.

"What am I doing?"
Replied Luna, sitting next to the display before her as she wrapped a hoof around her own needy shaft. Biting her lip to stifle a moan of pleasure, Luna continued huskily.

"It's not what I'm doing dear sister... It's what you're about to do"

"No stop!"
Celestia cried out in alarm, now understanding what her sister intended to do. Reaching for her magic for the first time since finding herself in this situation, Celestia let out a gasp at the realisation that her sister must have placed a null ring upon her horn. At this, Celestia began to once more struggle against her bonds, letting out another gasp as she accidentally stimulated her shaft again upon her newborn daughter below her.

Luna moved closer towards her sister with a wide grin splitting her face.
"Ah ah ah, there's no escaping this, so best you get ready to enjoy the fun"

One hoof reaching down towards the table, the other still sliding up and down her shaft, Luna set about strapping her daughter down onto the table to prevent her from moving, the small foal letting out some cute squeaks of confusion.

Upon completing her task, Luna let a savage smile cross her face as she grabbed ahold of her sisters shaft with her spare hoof, angling it onto the small slit of their underage daughter. The small foal oblivious as to what was about to happen her.

"Luna stop, please don't do thi... Ahhh"
Celestia pleaded as Luna's horn alit with the glow of her magic, surrounding the hind quarters of her sister and pushing her forwards, hard, forcing her shaft against the tight slit below. The tiny foalhood resisted for a few seconds before midway through Celestia's sentence, her cock was finally forced inside.

The foal, quiet but confused up until this point, let out a high pitched squeal of pain as her father was forced to enter her pussy years before it was ready to accommodate a shaft of such size.

Celestia's mind went blank, her cock squeezed by the tightest most pleasurable pussy she had ever been inside, the blindfold increasing the physical sensations she was feeling orders of magnitudes greater than she had ever felt before.

Luna watched on, stroking herself harder and faster as she had just forced her sister to take the virginity of their own daughter, the foal wailing and crying as she was impaled on a shaft almost as large as she was. Only her nature as an Alicorn keeping her alive and preventing permanent harm from coming to her.

With higher thought processes gone from her mind, Celestia's body fell back upon its base instincts, and these instincts, were telling her body to breed. Without thought or care, Celestia pulled slowly back out of her daughter, the head of her shaft just resting inside, the vibrations of the crying causing extra pleasure to her sensitive shaft.

With an animalistic snort, Celestia forced herself back inside, the impossibility tight walls of her daughter being battered aside to make room for her shaft. Pulling outward once again, before thrusting back inside, Celestia began to develop a rhythm, pushing deeper and deeper on each thrust, the wailing from the foal increasing as the head of Celestia's shaft battered against her underdeveloped womb.

Grunting and panting in animalistic need, Celestia thrust even harder, jolting the table with each thrust, until at last, this final barrier gave way. With one last scream, the pain overwhelmed their daughter and she fell unconscious.

Luna watched on in perverse delight at the bestial display before her, orgasm creeping closer as she watched the bulge of her sister's shaft plunging back and forth inside her foal.

A wicked thought crossed the mind of Luna, one which her lust addled mind quickly acted upon. Stroking faster, Luna once more lit her horn, focusing a spell upon her daughter, Luna stimulated the unconscious baby's fallopian tubes to drop down an egg, ready to be fertilised by her animalistic sister's potent seed.

Celestia's body began to prepare for the release it was working towards since the initial penetration. Testes swelled with potent seed as the tight foal pussy stimulated most of her shaft, the top of her equine cock beginning to flare to ensure the impregnation of her mate, regardless of impossibility of the task under normal circumstances.

Watching on, Luna felt her own body prepare to release, her own shaft flaring sympathetically with her sisters at the depraved sight before her.

Suddenly, Celestia thrust forth hard, forcing her entire shaft into the unconscious foal before standing stock still, muscles twitching as her cock began to fire its load deep within the confines of her daughter, her fresh womb beginning to swell with seed, hunting for the lone egg forcibly released by her sister.

Upon taking note of her sister's orgasm, Luna quickly stood up and aimed her cock at her beautiful foal, shooting in seconds at the orgasm of her sister, Luna fired rope after rope of thick semen onto the unconscious filly, painting her white as she slowly began to swell with potent seed.

Watching the impregnation of her newborn daughter was the hottest think she'd ever experienced. As the strongest orgasm she'd ever had finished, Luna's shaft flagged before retreating back into her sheath.

The same could not be said of her sister however, Celestia's shaft was kept hard by the strangle grip of her daughter's snatch reflexively milking her cock for all of its seed. At this point Celestia began to return to her senses, shuffling about uneasily at the bolts of pleasure still shooting up her spine.

"What did you make me do?"
Celestia cringed sternly at the realisation she was still balls deep in her daughter, despite her shaft beginning to lose its hardness.

"Awww, don't worry dear sister" Luna replied sweetly as she ignored Celestia's question, a smirk finding its way onto her face once more.
"I'm sure your foal together will be beautiful"
Luna tittered gleefully.

The shock that passed across Celestia's face was compounded by the feeling of her shaft hardening and her balls clenching at the news she had just impregnated her newborn daughter, an orgasm wracking through her body in perverse delight.

"That's it sister, you finally understand too don't you? It's the right of an Alicorn to take what she pleases"
Luna responded as Celestia's second orgasm rocked through her body. Walking up to her sister, Luna began to gently stroke her hoof across her sister's side as she experienced her second orgasm inside her daughter.

Luna's twisted words found root inside the mind of her sister, igniting a deep passion within the older Alicorn for such perverse pleasures.

With a twisted grin on her face, Celestia channeled a large amount of magic through her horn, shattering the null ring as she proceeded to remove her bindings. Taking a step back as Luna watched on in awe, Celestia pulled her still hard shaft out of her daughter. The abused foal's pussy stretched wide open and leaking thick cum as streaks of white from Luna's load still marked her body.

The sight alone was enough to return Luna to an erection, but the next words from Celestia caused a throb and a large shot of precum to spray across the floor.

"Now little Luna, I do believe it's your turn with our little hole" Growled Celestia with a malicious grin.