Once they were inside, Porcelain quickly took stock of her surroundings. It was dimly lit from the various candles and wall sconces. In the middle of the room was a table with a plain white tablecloth draped over it. At the head of it was a makeshift stone archway with podiums on either side adorned with tapestries and additional candles on top of them. On the opposite side closest to her was a large stone basin. The whole room looked like it was decorated by vamponies, and wasn't helping at all to quell Porcelain's nerves. Arrell draped a foreleg over the pegasus and lead her over to the basin.

"'Kay. Go ahead and stand here and remember, just relax and roll with it." she instructed.

Porcelain nodded her head and looked at the container before her. The smell pervading from it was rancid, like a toilet that was used without any water and had never been cleaned. The stale stench almost gagged the pegasus as much as it aroused her. In spite of all her apprehension, her perverse libido was unyielding.

"EEP!"

Out of nowhere Porcelain suddenly felt a wet, slimy sensation run itself across her tailhole. She craned her neck back to see Arrell's head buried under her tail, helping herself to a taste of the pegasai's backdoor. She wasn't sure whether or not this was part of the ceremony or if the earth pony was simply taking advantage of her. But either way, the skilled mouth feasting on her asshole ensured that she wasn't too concerned about the motive. Porcelain's eyes fluttered closed as she leaned into the bowl, lifting her rump up a little out of instinct. The only sounds coming from the room were coos of pleasure and unabashed lapping. For the moment, Porcelain's nerves steadied themselves, comforted by the familiar sensation of somepony's snout worming around in her butt.

It was only when the lapping of that silky tongue stopped did Porcelain open her eyes. She was greeted by the sight of a domineering Matilda standing on the table, staring down at her with an air of absolute authority. The spotted earth pony was wearing a turtleneck sweater with red trim around the neck and sleeves. Her sudden presence startled Porcelain, making her flinch. Her nervousness was creeping back up, it and her arousal battling it out within for dominance. The pregnant silence was broken when Matilda began to speak.

"State your name, dear." The earth pony commanded firmly.

"Po...Porcelain W-Wave."

The Pegasai's voice was shaky.

"You wish to take communion from my vessel, correct?"

"Yeah."

Matilda cocked an eyebrow. "Yes?" She asked more sternly.

"Y-Yes, Madam Matilda." Porcelain quickly corrected.

"Do you swear to do so willingly, and without question, so long as you remain in this coven?"

"Yes, Madam Matilda."

The autocratic equine kneeled toward Porcelain, and whispered seductively to her.

"Declare your adoration for my vessel."

Porcelain froze up for a moment, having been put on the spot. She thought back to earlier, and saw in her memory the massive, fragrant pony plot before her. Right as Matilda sounded as though she were growing impatient, the pale blue mare spoke again.

"I wish to bask in your essence, Madam Matilda. I want my lungs drowning in your stench, my stomach full of your foul shit, and my body covered in your pungent wastes. I want to relish in everything your ass has to offer."

Matilda pulled away, looking very pleased with the pegasai's declaration.

"And you will, my dear. Indeed, your oath is exceptional."

Porcelain felt an immense weight lifted off her withers as quickly as she felt its burden.

'Oh thank the fucking princesses! All those big words Eerie uses are actually good for something!'

Matilda turned her back to Porcelain and sprawled out across the table with her ass on full display, the basin being the only thing between it and the pegasus.

"Arrell. Prepare the new devotee's communion, and do not taint the offering." Matilda demanded.

Wordlessly, Arrell approached Matilda and climbed atop the table. Porcelain looked up in silent awe. The yellow earth pony was fully erect, revealing a cock that the she could've sworn was nearly as long as her foreleg. She gazed upon it with hunger before it disappeared behind the equally impressive pair of balls that she had since grown familiar with. The various scents wafting all around her were overwhelming. Matilda's densely aromatic ass and vulva, Arrell's own musky genitalia, and the fetid stench of the bowl she leaned against were making it nearly impossible for her not to thrust a hoof between her hind legs and rub her pussy raw.

When she thought her olfactory couldn't be overstimulated further, just as Arrell had positioned her throbbing member at the barren entrance, Matilda let loose a deep, bellowing fart that washed over both the turgid organ and Porcelain's entire frame, making her tear up from the sheer heaviness of the reek.

As the the bubbling sound of Matilda's pucker tapered off, Arrell pushed herself in, sinking the head of her dick deep into the Madam's greedy rectum. They groaned in unison, relishing in the feeling of the plunged, hot depths.

"Hah...Fuck 'Tilda. I can feel it sloshing around inside." sighed Arrell.

Matilda grunted in acknowledgement, her mind preoccupied by how absolutely stuffed she felt.

Slowly but steadily, Arrell began to pump in and out of Matilda's tailhole, each thrust leaving the massive horsecock smeared with fresh streaks of shit. Layers upon layers of filth building up every time the imposing phallus sunk into the ever bedraggled ring of flesh. Porcelain watched with rapt attention at the show she was getting, leaning in as close as she could. She wasn't entirely sure how much this played into her initiation, but she sure wasn't complaining. Watching Arrell ramp up the force of her thrusts was pushing Porcelain from a feeling of desire to outright desperation, and the final straw broke when the pendulous ball sack swinging back and forth began grazing her muzzle, wiping sweat upon it. Her restraint broke, and a wayward hoof found it's way between her legs, furiously mashing away at her winking love button, bracing herself on the basin with her other hoof to keep herself reared up.

Matilda was moaning like a wild beast as her friend and fellow cultist pummeled her ass, thoroughly mixing up the gift she was ready to bestow for the eager pegasus. Arrell's cock had become completely caked, it's original color completely obscured by the new malodorous pigment, with the increasingly softened manure running all the way back to her swollen sack.

Porcelain, needing to be closer, climbed into the basin and pushed her face into Arrell's sweat and shit covered scrotum, groaning in lust from finally being able to feel those hypnotic orbs smother her snout. She breathed deep the miasmic pheromones as though she were starved of them, her moans of gratification muffled by the flesh, sending vibrations tingling all throughout the delicate organs.

Unfortunately Arrell was under very strict instructions, and against her own wants and needs, came to a stop and pulled out of the madam before she could blow her load into her bowels.

Feeling like she had royally screwed something up, Porcelain frantically climbed out of the receptacle and returned to her original position. It wasn't a second later that she heard a wet bubbling sound, and watched as Matilda's pucker erupted with an enormous crackling wave of semisolid slop that spilled endlessly into the basin.

Porcelain watched awestruck as the stone container quickly filled up from the powerful diarrhetic river pouring out of the back of Matilda. The defecating mare huffed and groaned as she emptied herself in front of her initiate, reveling in the feeling of excretion and the thought of the new pony devouring it.

Porcelain honestly thought that with as quickly as her shit was gushing out, that Matilda would have emptied much sooner. but even as the muck rose to the top, it just kept coming, eventually overflowing and spilling out onto the floor. Matilda did however eventually empty, leaving her panting and exasperated from the ordeal. Porcelain was covered in brown splotches across her face, chest and hooves. Some from Arrell's filthy ball sack, most from Matilda's waste splashing on her. She looked down at her communion with anticipation, eyeing it like it was the most coveted meal in Equestria, her clit winking like mad and her mare juices consistently dripping.

Matilda was facing Porcelain once again, looking down on her and the feculent results with pride. The fumes from her shit would drop most ponies at first whiff, but all of the ponies in attendance drank it in as though it were the fumes from the most appetizing delicacy.

"Alright my dear. You've waited this long...Partake."

Porcelain immediately pushed her entire snout into the revolting slop and started noisily slurping it down. With her head tilted down, her eyes looked upwards to meet Matilda's approving gaze. The gurgled, needy moans of the pegasus was like music to her ears as she watched the mare gulp the slurry down.

Arrell on the other hoof had grown tired of watching from the side, and with dick still plenty hard, found herself behind the small bubble butt of Porcelain yet again. The pegasus jolted from the sudden weight on her back. Arrell brought her mouth over to one of her ears.

"That felt pretty rad earlier, you trying to suffocate yourself in my nuts. But you almost messed up the rite, you know." She said in her flat tone.

Porcelain whimpered pathetically as she continued to suck down her offering. She figured she had almost ruined everything, but the those big, heavy balls were simply too tempting to pass up. Then she felt it, the tip of that monstrous cock poking at her asshole. Still slick with Matilda's runny shit, Arrell shoved herself into Porcelain's tight rear entrance. The pegasus was certainly no stranger to anal, but this monster was still a lot to take in. By the time Arrell had hilted, it felt like that beast was going to come up her throat and pop out of her mouth. She couldn't remember the last time she felt so full.

With Arrell nestled deep in a new hole, she proceeded to pump away into the petit pegasus, determined this time to get her rocks off. Porcelain felt stretched to her absolute limit, struggling to stay focused on the bowl of shit in front of her. It became even more difficult as the thrusting grew more fervent, and Arrell put both her hooves on the back of her head, dunking her further into the bowl.

Matilda laid on her side, taking in the sight of her friend plowing away at the helpless mare. She looked down at the basin and had to admit to herself that she was impressed with Porcelain's efforts. It had nearly been completely drained, and looked like it would be soon. Her moans were much more audible and she sounded very close to cumming. The pegasus looked up, her eyes looking as though they were pleading for permission.

"Cum dear. You've more than earned it."

Porcelain's pucker clenched hard around the still pounding rod of pony flesh as her pussy squirted out every last drop of marecum she had in her, the fluids raining down onto Arrell's bulbous sack and the overflow of waste on the floor. The sheer pressure of Porcelain's colon walls clamping down was enough to drive Arrell over the edge as well, ejaculating a healthy dose of her own brand of 'marecum' deep into the pegasai's guts. The small, blue mare's tummy had bloated considerably from the the vulgar body fluids within her, giving her an ample pudginess to her otherwise lithe form.

The once copulating ponies were exhausted, Porcelain more so after the grand hammering she had just taken. She tilted her head up with what was left of her energy to see a very proud Matilda beaming at her.

"You did splendidly my dear. I am honored to welcome you to the cult. Now all that is left is for you to do is cleanse the sacred instruments of the rite, and your initiation will be complete."

Porcelain looked at the fecal splattered bowl before her, and began dragging her tongue all across the rim and it's interior. The stone texture was rough, but not abrasive. As she cleaned, she winced at how sore she felt below.

'Oof, that's gonna hurt tomorrow. But mare, was it worth it.'

Before she knew it the basin was spotless, but still reeking of fresh and old shit just as bad, if not worse than before. Porcelain felt like she could crawl into it and pass out right there despite the smell.

"Ahem. Dear, you still have one more instrument to cleanse."

The pegasus looked up confused before she suddenly had a large slab of sticky warm flesh draped over her face. She turned to face Arrell and her generous package properly. She smiled sweetly at Arrell the entire time she lapped away the filth, even though Arrell herself looked bored the entire time, save for a weak smile and a faint blush she tried to pretend wasn't there.

After licking up the last feculent morsel from the wrinkles in the dick-mare's sack, Porcelain could finally say her ritual was complete. She hobbled over to one set of curtains and took a peek outside. It was late, and she was worried that she was going to have to make the long trek home on hoof. No cab driver alive would let her in their carriage soaked from head to hoof in shit and cum, and she was far too tired to attempt flight.

"Come now, dear, I have an extra room here. I wouldn't make you travel home this late at night. I'm not that cruel." Matilda giggled wickedly.

"Oh, thank you so much Madam Matilda-ahhh." Porcelain said, the end of her sentence tapering into a yawn.

"Not at all, my dear. Thank you for being such an enthusiastic initiate. The pleasure was all mine, watching you scarf down the entire basin without relenting. I think you'll be right at home here with the cult." Matilda praised. "Now if you'll excuse me, I'll be retiring to my own chambers. Your room will be down the hall and to the left."

"Sweet, I'm stepping out for a smoke." Arrell added.

Soon everypony departed for the night, each pony going in separate directions. Porcelain didn't have the wherewithal to think clearly, much less about the debauched events that had just transpired. All she knew was that she was sore, tired, and had a damn good time getting to that point. The last thing she thought before falling unconscious...

'If that was just the welcome wagon, I wonder what the regular meetings are like. Peach would love it here...'

And with that, she passed out, unwashed and lulled to sleep by fatigue. The gurgling contents brewing deep within her stomach and tailhole churned and leaked out of her onto the bed's once clean comforter throughout the night.

Author's Note

Finally a break in the silence! Special thanks to Arrell for letting me write their cute pones. Hopefully I can avoid another huge gap between stories!