"... use demon magic to grow another cock!" (Multi-cock)

"I know this good ol' handy spell from the good old days. I can summon myself another cock from the void, perform the ritual, and get you off the hook on this stuff. Can't have you blabbing to your mortal doctors about being **** for demon seed..."

Two cocks, eh? You admit, that does sound quite appealing. You guide Arisa through into your bathroom, and lock the door- just in case. She summons a few candles and other typical demon ritual junk before sitting down on the floor and appearing to meditate. There's nothing but silence, and the flickering of the candles around Arisa as her mighty chest rises and falls, in perfect focus.

You wait... nothing seems to happen. You don't want to distract the expert here, so you sit down and very quietly strum your fingers whilst you wait for whatever Arisa is intending to happen, happens.

With a small flick of her wrists, the flames enlarged in size, and a swirling mass of green smoke engulfed her crotch. When the clouds settled, the sight was indeed one to behold. Arisa now sported two, very large, thick set cocks- a one slightly darker shade than the other, but both frankly equally as gut bustingly intimidating. "Right." She exclaimed, striking a pose that showed off both her massive dicks at once- "We don't have long until this wears off. Come stand in the circle for me, and bend over."

You did as you asked, standing in the centre of whatever unholy pattern this was, and bent over until your hands touched your toes, and then grabbed your arse cheeks with two hands keenly spreading them wide. You shook your butt as attractively as possible, feeling your mass wobbling, trying your best to get Arisa's attention. It didn't take long. She grabbed both dicks, hauled them both up onto your back with some effort, the weight visibly pulling you downwards somewhat. You heard the sound of a cork coming out of some sort of flask, and looked back to see Arisa probing your tight little arsehole- "Gotta get you REALLY lubed up for this one. This is like, weapons-grade lube here."

There was a certain coldness to the thick liquid she spread across your pucker, sometimes being adventurous enough to probe slightly inside and get the interior slick for what was to come. And with that, her fingers withdrew, and her cock slid off your back, leaving you rather nervous, to be honest. "No distracting me now. I'm going to start off with one dick, take it up to two, and then perform the ritual. Don't distract me if you can, or I may end up summoning the rapture, or something equally less sexy." She senses your nerves for a moment, and puts a hand on your back, leaning down close to your ear- "Relax, and you'll love this."

There's a distinct stillness and silence. Your position is compromising- you can't see from your angle what's going on behind you, which makes you feel ****. However, it's all for the greater good, right? If she only comes up once a millennium, that's a long time to wait for your next fix. Silence, and then, you feel the fairly familiar shape of a cock head pressed against your arse. With slow, but deliberate ****, she begins to press forward- for a while, nothing happens- the cock starts to dent into your arsehole, not really penetrating, more forcing it away. She takes it again, presses against your pucker, and tries again- this time, she's successful, and you know it.

With a plop sound, her monstrously large cock head enters your arsehole. You cry out, and Arisa gives you a rather violent spank across the cheek, trying to maintain her strict ritual composure. You clamp a hand over your mouth, but it doesn't stop the sound escaping as your ring is further stretched and stretched further out by the first few inches of her cock- this was only the beginning, and you felt like it was the whole thing- this really was a hugely gigantic schlong, and you felt a sense of pride for having taken this down to the balls. With that in mind, you focused yourself, relaxed your muscles, and gritted your teeth.

Arisa shoved the next few inches in. It hurt less than the last, thankfully- your arse felt pleasantly full, and a hand to your lower body told you her cock was certainly filling you up- the familiar shape of Arisa's cock was visible through your stomach- to be honest, it wasn't really disturbing in anyway. You just focused on the feeling of her thick veins pumping away rhythmically inside you, the periodic pulse of her cock head from the pleasure you were giving her, and that curbed all worries. Arisa's drew out again, so the tip was the only thing still present, then pushed further than before- new depths were reached, your belly swollen more, and, most importantly, the pleasurable, direct ramming of the underside of her cock head pressuring your prostate. The feeling was magical, and it was spurred on by the feelings of being spread out so far. You thought about your arsehole being largely gaped by the aftermath of this personal apocalypse on your pucker.

She drew back, out of your arse- leaving you completely empty and unfilled. You tried to grab at her dick, securing a hand around some part of its length, and clumsily shoved it back into your arse- sighing quietly from relief as it reentered. Arisa pushed again, further, further, the cock head first pushing past your prostate, making your cock jump in satisfaction, and then the further stimulation as you felt her cock pass it, the thick veins pulsing rhythmically against it as it pushed past further in. You thought to yourself that this must be all of it, and soon you would feel her heavy balls with its juicy payload smack against your slutty butt, but this was not the case- Arisa pulled back, made a point of pulling all the way out, making you softly whimper, before settling for the direct route- plunging, all in one go, from the tip to the base, with a massive audible SLAP of her balls quaking your arse cheeks, making them ripple with delight. You felt the full **** of her cock on your prostate, and more, as the tip to the deepest possible length all swiftly brushed against it, sending your dick into another spasm.

She remained there for a second, and you took in the feeling of being full and warm, filled with demonic cockmeat, the pressure on your prostate, the feeling of being spread, wide and open for this massive hellspawn cock, and the promise of more cum to fill your stomach further.

Arisa pulled out, all the way, slowly, as if to tease you- even in a ritual, she was still a mean son of a bitch. You shivered as she left, but it was not long until she shoved her cockhead back in, keeping it still at the entrance, like a butt plug. You waited patiently, until you felt two fingers enter under your butt, spreading it downwards, and three fingers at the top, spreading you open upwards. You moaned softly, and Arisa moved her cock meat up towards the top, so you could feel the cool breeze of unfilled arsehole underneath it. What shortly followed, as you predicted, was her other cock- even, if it were possible, with a slightly bigger head than the last. It was clearly a struggle- even Arisa in her fixed, determined concentration moaned with effort, trying to sandwich two cock heads into onto virgin arsehole. Finally, after a lot of energy, with another plop, in went the other cock head.

The feeling of one cock head spreading out your arse? Amazing. The feeling of too? Painful, sure, but even more incredible. With slow, deliberate ****, the demoness shovelled both cock ends forward, further, further, until she was a good distance in. You felt amazing- pure pleasure, the feeling of being truly dominated by this hell spawn- bliss to you. And with that, she began to chant in tongues, all whilst picking up the pace- thrusting, hard and fast, again, pressing against your prostate, but this time with such great **** due to the limits of your little arse that it made you tremble with pleasure, before she got into the rhythm of deep, long, but swift strikes. You began to moan, rather like a slut, in a way, I guess. You made noises that were subconscious, but quiet enough that Arisa wouldn't give you another backhand. The repeated sounds of moans being cut short by being violently rammed escaped your mouth.

Thrust, thrust, thrust, each one spreading you far, making your arsehole gape more and more, making your cock jump with excitement, and your mind hazy with lust. The final thrust- deep, a massive slap of her balls to your butt, and her chanting finished. She physically picked you up, vertically with great ****, so she was almost using you like a cock toy, impaled on her dick, unable to climb off and escape- if you wanted to, which you didn't. Vigorous thrusts as you were fucked completely silly by this wonderful pair of cocks- bouncing you up and down their length like a cheap cock sleave- the ritual had finished now, and this was just Arisa's fun.

She dropped herself to the floor, so you were on top of her, and spun you around. You looked into her eyes and saw pure lust, as she then again, grabbed you like a rag doll and violently bounced you up and down on her dick. Finally, after what seemed like an age, she grew exhausted, and pulled you upwards and off with ease.

You both sit there, panting. A while past- nothing was said. You hoped the ritual would work. Sliding a hand around behind yourself, you could feel the extent of the destruction on your previously tight, perfect ass. It was now loose, sloppy, wet, with drips of precum falling out onto the floor. You felt used, but in a good way.

Arisa finally caught her breath, and signalled you over, panting still. "Put a hand to my balls." She suggested, and you did. Amazed, you couldn't believe it- even thicker, even fuller than before. "I'm going to cum about a bathtub full of cum. You bathe in it for a while, and that whole addiction thing is all over, and I can go back home. You can also get your fill of splashing about in my seed, as well."

You nodded, still exhausted. She allowed a while for you to catch your breath. You showed off your gaping ass to Arisa, smiling as you did, spreading it even wider with your hands. She was impressed by the amount you managed to take in there, and jerked off a little to the sight of your abyss-like pucker, calling you a buttslut, and various other kinky dirty talk.

Finally, it was time. You clambered into the bath. Arisa stopped, and waited. She looked at you, and exclaimed-