“FOUL DEMON! RELEASE ME AT ONCE! I KNOW YOU CAN HEAR ME!”

As had been the case for hours, no one answered the princess of the night. The dungeons of Canterlot Castle were a relic of harsher times and, as a result, few ponies of the modern age had ever seen the inside of their stone cells. It was in one such cell Luna found herself in now, bound and naked. Her arms were held above her by chains, keeping her constantly standing but also chaffing her wrists harshly. Her wings were also clamped together, developing a cramp such was the tightness of the restraints. Were it not for the inhibitor ring clasped around her horn she would’ve already escaped and sought revenge on the foul Tartarus-spawn that had laid her and her sister low.

This train of thought led her to dwell on the fate of her sister, of Twilight and her friends, and of Equestria at large. She had awoken in this cell and none had visited, meaning she had no clue what the situation above was like. Had Twilight and her friends fallen back to regroup? Were they captured as well?

No, Luna shook those thoughts away. I cannot lose hope. Twilight and her friends WILL succeed… They have to…

The sound of footsteps echoing down the hall suddenly caught Luna’s attention, and she held her tongue. There was no way of yet knowing if this was friend or foe. Her ethereal tail slowly swayed like that of a big cat sizing up its prey, waiting for this individual to reveal themselves. She didn’t need to wait long, as the succulent form of Talvira stalked into her cell. Rather than yell and rage as she had been for the past few hours, she decided to take a page from her sister’s playbook; give the enemy no satisfaction and wait for them to make the first mistake.

“I’m so sorry I haven’t been able to visit sooner, princess,” Talvira taunted, slowly circling the restrained alicorn. “But I’ve been very busy with a little challenge I’ve set up. So far, Equestria still has a chance, albeit a very slim one.”

Luna processed this and immediately reached a few conclusions. Though she maintained her uncaring façade, it hurt her to know that Twilight and her friends had also been captured, meaning this monster was now in control of Equestria. This also meant her sister and even Discord were prisoners, another testament of Talvira’s strength. It also revealed, however, that pride had provided an opportunity. If there was some challenge the element bearers were enduring for the sake of the kingdom, then she had no doubt they would succeed as they had countless times before.

“That flier and farm pony were rather pathetic, but hopefully tomorrow provides me with the result I desire.” Talvira stopped circling, now standing behind the princess. “Speaking of progress…” Luna flinched at first, and looked down to the demoness now groping and kneading one of her E-cup breasts. Despite the sensations, Luna looked away, refusing to give Talvira the satisfaction of a reaction. “What’s wrong princess? Cat got your tongue?”

“You will never succeed,” Luna finally shot back, still ignoring the hand manipulating her melon.

“Ah, you can speak,” Talvira ignored her barb. “And here I’d thought accidentally crushed your voice box and hadn’t noticed. And what, pray tell, makes you think that dear Fluttershy has a chance of stopping me.”

“Because your kind have always been bested before, and you shall… Wait… Fluttershy?” The name caught her off-guard. Surely this demon meant in a manner alongside her Twilight, correct?

“Oh, that’s right. You’ve been stuck down here all day.” Talvira released the tits and circled back to face the princess. “Allow me to catch you up to speed; Fluttershy has accepted my challenge to save Equestria. All she has to do is resist any temptation I can throw at her, and so far, she’s succeeded. But it’s only the first day, so there is plenty of time for her to fall. And when I do, oh the things I will do to her.”

“ENOUGH!” Luna roared, settling back into the Royal Canterlot Voice. “FLUTTERSHY SHALL NEVER FALL TO YOUR TREACHERY! NOW RELEASE ME OR SUFFER MY WRATH!” Immediately she knew she’d overreacted, but she couldn’t help imagining what poor Fluttershy had endured in this challenge. Now Talvira eyed her critically, like a hunter observing its prey. After a moment or two, her sadistic grin returned.

“Well, if you feel so strongly about it, why don’t you take her place?”

The suggestion completely stunned Luna, her guard dropping as confusion set in. “W-What? What do you mean?”

“It’s as I said, princess.” Talvira explained with a nonchalant shrug. “If you wish to spare dear Fluttershy any more corruption from this challenge, then I’ll make you a deal. You take her place, and if you manage to resist me and my advances for the rest of the night, then I’ll cease tormenting that beautiful pegasus and leave Equestria for good.”

Luna mulled the offer over, knowing full well there were caveats Talvira wasn’t sharing. “And if I were to fail?”

The devilish grin grew. “Then you serve me. Mind, body and soul. So, do we have a deal, princess?”

The alicorn mulled it over. This was the bait to an absurdly obvious trap. For all she knew these challenges she was putting Fluttershy through were nothing but a fantasy woven to get under her skin. But… her options were few. If she were to refuse this offer from Talvira, it would likely result in her remaining in this cell, waiting to be broken in anyway while the world outside was turned upside down. Or worse, she would be left all alone in this cell for who knew how long. At that thought, painful memories of her imprisonment within the moon resurfaced unbidden. Quickly changing mental track, the only other option was to take Talvira at her word and outlast her for one night. She would no doubt pull some dastardly trick, but Luna had had some outlandish partners during her youth. Furthermore, if this act could save Fluttershy any form of degrading act, then it would be worth the shame.

Looking back at the demoness, Luna’s look turned to one of defiant determination. “Very well, Talvira. If it will spare Fluttershy your evil, then I accept, but you must swear that if I am victorious, you will honor your agreement.”

Talvira grinned in response, and traced a glowing white x across her chest. “You have my word, princess. Now then, let us begin.”

The demoness walked up to Luna once more, emphasizing her swaying hips that little bit more before pressing her body into the princess’ side and locking lips with her. Luna didn’t resist the contact, but couldn’t help notice Talvira once again groping her boob, nor could she ignore the raging boner resting warmly against her belly. But she focused on suppressing any and all feelings. She could not afford to fail. Their tongues wrestled one another for what seemed like minutes to Luna, so when Talvira pulled away leaving a line of saliva linking the two, she was surprised to discover her thighs were playing host to small streams of liquid from her crotch.

“W-What? But I-” Luna’s astonishment was interrupted with a hard slap to her breasts. Before she could yell at Talvira, another slap to the other. The monstress then harshly gripped both breasts of the night princess and squeezed, digging her pointed thumbnails into Luna’s erect pale-blue nipples.

“What’s wrong, princess?” Talvira asked, a growing sound of aggression in her tone. “I thought you could take this. Don’t tell me you’re all bark and no bite?”

Gritting her teeth, Luna tried shaking the sensations off once more and glared daggers at her tormenter. “Mmf… T-This is nothing. No, no matter what you do to me… I shall not lose!”

“Well then, prove it you slut!” Talvira pulled both boobs to the sides by the nipples, stretching the royal melons out before slapping them back together, only now they had sandwiched the demoness’ massive member. Before Luna could protest, Talvira’s magic flared and the princess found her head pushed forward. She tried turning her face to the side, but the magic corrected course and opened her mouth, forcing Luna into both a titfuck and a blowjob. The sting from the slaps coupled with the heat from the demonic meat meant Luna’s breasts felt just as warm as the growing heat from her muff, while Talvira’s flared head kept ramming into the back of her mouth, making it a struggle to time her breaths with a constant trickle of precum sliding down her throat.

“Come on, where is that confidence you had a second ago?” Talvira gloated, not slowing the pace of her hips at all during her monologue. “You won’t last long if this is the best you’ve got. Come on, Princess. Show me some fight for once.” Luna, growing annoyed with both Talvira’s attitude and the building heat in her loins, responded by licking the invading cock as best she could. The effect was immediate; a sly smile forming on the demoness and a slowing of her pace.

“Ooh, that’s more like it, princess. Come on, work for it.” The pressure lifted from behind her head, Luna was able to lean back a bit, leaving Talvira with only a titfuck as the flared head of her cock escaped her mouth. Each time the slower thrust brought the dick closer, the alicorn graced it with a gentle lick along its slit. Her actions brought sensual moans out of the fiend, which she took as a sign of progress.

“Are we feeling a little sensitive?” Luna dared to ask, her confidence rising even as the heat in both her breasts and nethers was growing harder to ignore. “If you released my hands, I’d really be able to show you a good time.” At this, Talvira stopped. Her motions screeched to a halt as she stared at Luna. She even released her hold on the alicorn’s breasts, freeing her dick from their soft embrace.

Luna was about to fire off another snarky comment before Talvira roughly grabbed her by her star-filled mane and impaled her cock into the princess’ mouth as far as it could go. Luna struggled not only with the feeling that her jaw was dislocating but also, with inch after inch of thick demon meat clogging her throat, she couldn’t breathe. She wanted to reach down and push her out, but her hands were still firmly locked above her head, and Talvira resumed her harsh fucking with monstrous zeal.

“You dare speak to me like that, bitch?” She asked, her tone now devoid of malicious mirth and sounding only cold as she hilted herself in the princess’ mouth over and over. “You were doing so well until now. Bitches who like you that talk back deserve to be punished.”

Luna could feel herself fading away, her vision blacking out at the edges due to oxygen deprivation. What snippets of air she could take in between thrusts was filled with the musky scent of Talvira’s sex, increasing the light feeling flooding her mind. Before she could fade into unconsciousness, Talvira’s cock swelled for a second, and that was Luna’s only warning before the demoness came. A veritable torrent of jizz streamed down her throat directly into her stomach. The princess’ eyes were rolling into the back of her head and her vision was fading before Talvira finally pulled her dick out, still rock hard and spraying another blast of cum onto her face and tits.

Luna coughed up a large amount of the semen that had just been poured into her, messing up even more of her chest and belly as she gulped down deep breaths. A pair of hands lifting her feet off of the floor pulled her out of her cum-drowned stupor, and before she could put together what was happening, a stiff pain from her lower body woke her right back up. Looking down, she witnessed Talvira now pounding away at her pussy. The fact she was still so hard after everything, and all the foreplay and face fucking beforehand, meant Luna was now struggling to stay awake as well as sane. She considered it a miracle she hadn’t cum yet, but she knew it wouldn’t be long.

“What’s wrong,” Talvira nearly roared at her, pushing deeper with each thrust. “Where’d all that confidence you had before go, huh? Or were you writing a check your ass can’t cash?” Luna didn’t reply, spending all her energy on resisting this feeling, knowing that with each slap of skin on skin, it became that much harder. Another slap to her abused boobs forced the alicorns’ attention back to the demoness, looking her dead in the eye as Luna felt her cock growing larger. “You know what that means, don’t you? You’ve lasted fine up ‘til now, but let’s see how you can handle this!”

Luna’s eyes widened as Talvira suddenly picked up the pace. That combined with the swelling member, meant only one thing. “No, no, you can’t! Take it out!”

“Too late princess. Take it all!”

With that roar, Talvira came. Her pole exploded within Luna’s folds and for a moment or two the princess blacked out from the sheer pleasure as copious amounts of foal batter filled her insides. When she came to, Luna could feel her belly begin to bloat as the fiend was still pouring more spunk into her body. She tried to sway, tried to move in any way that might help dislodge the cock, but with her restraints she was stuck taking it.

“H-Ha… Y-You… lose,” Luna struggled to speak, barely holding onto both consciousness and sanity as she shot an underwhelming glare at her assailant. “I, ugh… I’m… still… sane.” Talvira, barely even sweating despite the savage nature of her rutting just now, looked at Luna confused for a moment before throwing her head back and howling in laughter.

“You, you actually thought we were done?!” She sputtered out in-between laughs. “I said you’d win if you lasted the whole night. Plus, you think I’m spent after only two loads? If so, then you’re even more naïve than that dear Fluttershy.” Luna’s eyes widened in fear. Given the amount of pleasure she had just endured, she was unable to keep a reliable idea on how long it had been. Had it been minutes? Hours? She had barely held on during that last stanza, and yet the feeling of that thick cock still hard as steel, still leaking that demonic seed into her most precious place loosened her resolve enough for doubt to creep in.

“I’ll admit you did well to survive that,” Talvira went on, her tail rising to sway beside her face. “But let’s see how much longer you can really last.” The tail then slithered down until it rubbed against Luna’s painfully erect clitoris. Fireworks flashed in Luna’s mind and her head flung back as the bean was flicked and rubbed, her pussy’s grip in Talvira’s cock subconsciously growing even tighter. She looked back down to see the tail swirl into itself and thicken until… it resembled another cock.

“N-No…” Luna muttered, her self-control beginning to fracture as she realized what came next, the new tail cock lining itself up with her already full lower lips. “No, no, it won’t fit. Please, don’t do this!”

“Too late to back out of our challenge now, princess.” Talvira flashed her predatory grin once more as she pushed, squeezing the new cock inch by inch into Luna’s cramped pussy. The princess of the night howled in pleasurable pain, her voice echoing out in the otherwise empty dungeon as her mind was starting to go blank.

“NO! AH, UNGH, S-STOP IT! P-PLEAS-ARGH!” Unable to control her voice anymore, Luna screamed as the two intruders ploughed her alternatingly. Her walls were stretched to a painful degree as she could almost hear the sloshing of the semen already in her honeypot, not to mention the amount she had swallowed earlier. “N-NO MORE! MERCY! H-ARGH! HAVE MERCY, PLEASE!”

“Then say it!” Talvira snapped back. “Say you give up. Say you’ll serve me. Say it!”

“I-UGH!” Luna shook her head, trying to fight the lust overtaking her. She needed to persevere. For her friends, for her kingdom, for her sister. “ARGH! I CAN-NGH!” Everypony outside could be saved if she could just hold on. “P-PLE-UNF! ARGH!” But the pleasure. Oh, this unmatched feeling of pleasure. No fuck in her long life had ever left her this ragged, been this intense. “P-PLEASE! I… I NEED-MMM!”

“SAY IT!” Talvira roared, picking up the pace and thrusting both cocks in simultaneously. The speed they went act rocked Luna back and forth, swinging from her bindings as her sanity finally shattered.

“I GIVE UP! I GIVE UP! I’LL-UNGH! I’LL SERVE YOU! I’LL SERVE YOU, MY MISTRESS! PLEASE JUST MAKE IT STOP!”

Talvira smiled. “Good girl.”

With that, she hilted herself within the princess and came. Again, semen rocketed up Luna’s birth canal and painted her already flooded inside white to match the stains on her chest. The alicorn moaned like a common whore, all sense and reason fading away from her mind as she finally came herself. The otherworldly ecstasy travelled down every nerve, and her walls clenched around Talvira’s intruders tighter, milking even more jizz out of the demoness.

After another few minutes, Talvira finally felt her flow slow to a trickle. She raised her hand and summoned a small tentacled beast with an oval-like body before slowly pulling out her cock and tail. The moment they were free, she shoved the entity into Luna’s snatch, blocking the inevitable flood of semen that would’ve come gushing back out. Luna barely made a sound as the tentacles wrapped around her thighs and pressed tighter into her pussy; forming a seal that kept in every drop.

Talvira stepped back and beheld her latest conquest. Luna hung limply from her restraints, her neck and breasts stained with cum and femcum forming a wide puddle beneath her. Her belly had swollen as large as a beach ball, and a poke from Talvira revealed how it jiggled. Luna’s face was contorted into one of unapologetic bliss. Her eyes had rolled up back into her head, her mouth agape and her tongue hanging from it as she merely croaked and groaned in her post-orgasmic high.

“Well, seems like I win, princess.” Talvira gloated, knowing full well the broken alicorn could barely hear her. “And as the winner, your mind, body and soul are now mine. Understand?” The only acknowledgement she received was an infinitesimal nod. Talvira took Luna’s face in her hands gave her a gentle Prench kiss, the pony’s tongue submitting to hers. “Rest now, sweet princess. When you wake up, I have quite a few jobs for you.”

Author's Note

So, day one down, six more to go.
I just have to say I'm blown away by how much you guys have jumped on board with the story so far. The day after first posting it, I was feeling like the story wasn't good enough and was tempted to delete it, or that it would just be forgotten, lost among all the other stories being uploaded. To see so many people decide to add this story to their lists and groups is amazing and I can't thank you guys enough for that.

And now onto the new poll. In regards to the last poll, it was pretty obvious most of you wanted AJ & RD and Luna, but for the item it was a much closer race. I decided on a coin toss it, and the tassels were going to win, but a last minute vote secured the win for the bell collar.

Previous Poll:
Day
Rarity: 2
Applejack & Rainbow Dash: 6
Pinkie Pie: 2
Night
Luna: 6
Chrysalis: 2
Starlight & Trixie: 2
Item
Nipple Tassels: 4
Silk Sleeves: 0
Bell Collar: 5
None: 1

But a new day in story, and a new round of selections. Our choices today are;
Day:
Rarity
Twilight
Pinkie Pie
Night:
Chrysalis
Starlight & Trixie
Ponyville
Item
Replace Bell Collar with Nipple Tassels
Replace Bell Collar with Lacy Stockings
Replace Bell Collar with Clit Ring
Keep Bell Collar

Again, thank you so much for your support thus far and hope you continue to enjoy the story.