As the van finally came to a stop, Twilight grinned. this was it. The rune matrix was complete, and she had more than enough magic… She could regenerate the heart, and even pump it full of magic to give herself a power boost.

The purple woman pressed the red gemstone to the rune, as it began to glow extremely brightly. Twilight grinned and shielded her eyes as she suddenly felt a foreign magic flood her body… Enough to give her a crippling headache, as she grunted and collapsed to her knees.

Sunset panted hotly and groaned out as she climaxed again over the double-ended strapon Aria was using to rail her slit, the siren's hands practically mauling her defenseless and increasingly sensitive breasts, often earning pleasured whines and gasps.

Aria chuckled, growling "Looks like we've arrived!" before she was interrupted by an explosive BANG which erupted from the bathroom. She tensed and sat up quickly, before she exclaimed "The fuck was that!?", even as she grasped Sunset's leash and stood, roughly yanking the yellow-skinned woman to her feet. Sunset gasped shakily as she was forced onto her shaking legs, paling as Aria pulled her along. What had happened? She could only hope it was part of Twilight's plan…

The sirens each gathered in the main hallway of the truck, glancing to each other before Adagio smirked "Looks like we had another hideaway. Let's see who it is." she growled with a chuckle, quickly moving to open the door, before she tensed up and froze. Twilight stood in the middle of the bathroom, but… Something was off. A fully restored siren's heart hung from her neck, but her eyes… Her irises were colored a pure crimson.

Sunset tensed, only to gasp and wince, her arms struggling in vain as Sonata moved to squeeze her breasts viciously, pressing up against her back. The blue siren grinned, exclaiming "Ohhh wow! Did she try to supercharge one of our hearts!? Haha, must have overcharged it so much it turned her into one of us!"

Twilight looked up at her struggling redheaded friend, who looked up at her in worry. That worry soon turned into despair as Twilight gained a grin, stepping forwards and eyeing her as she purred "The blue one is right. Whatever happened… It changed me…" she chuckled, shaking her head "I can't believe I used to be one of those pathetic creatures…"

Adagio blinked, before she slowly gained a grin and replied "In mind and body, it seems! Perhaps you would like to join us… Twilight, was it? You may be powerful… But you need training. And something to sate your appetite…" with a laugh, slapping at Sunset's ass. The redhaired woman whined, leaning back and grimacing as she stated "P-Please, Twilight… Please say you're still in there…" fearfully.

Twilight grinned and walked over to Sunset, quickly pressing their breasts together before she forced her into a firm kiss with a look of dominance and satisfaction. Sunset grimaced in disgust and horror, groaning out as she struggled, but was only able to pull back once Twilight tired of the kiss. The purple-skinned woman stepped back, before she grinned and growled "…You're right. And it would be good to have some friends who are my equals… Fine, i'll join you. Maybe I can see to making myself a new heart artificially…"

Sunset whimpered and grimaced, tears coming to her eyes as Aria grinned and tugged her into a kiss, licking over her tongue briefly before the siren pulled back and exclaimed "Good! Let's show you around the mansion…"

The three original sirens left the van, dragging along their 6 captive-audience members and closely followed by Twilight Sparkle, their newest recruit. Each Siren did of course have their favorite slave — Adagio dragged along a struggling and angry Rainbow Dash, fingering the athlete aggressively and earning pleasured cries from beneath the bound woman's gag, as the siren's other hand casually (though roughly) squeezed Rarity's right breast.

Fluttershy trembled and whimpered, sobbing and squirming as she remained Sonata's favorite, the blue siren's hands gliding over her every curve and occasionally stroking at her breasts or slit. Aria, meanwhile, had ungagged both Pinkie and Applejack, and began fingering them both aggressively before ordering them to lick at her breasts. Applejack resisted at first, though showed a pained expression as the siren hummed in response and soon shouted her surrender, moving to lick at the Siren's breast — earning a smile and small moan from the powerful woman.

Sunset trembled as Twilight kneaded both of her breasts, the red-haired woman panting and moaning loudly with a grimace as the group soon halted so Adagio could unlock the door. Twilight took advantage of the situation, grinding her knee against Sunset's slit aggressively as the red-haired woman panted and cried out, soon climaxing over her leg as she sobbed softly "P-Please say you're still in there somewhere, Twilight…"

Twilight grinned, purring into her ear "I am." Sunset's hopes raised, her eyes lighting up before Twilight continued "…Going to love forcing you to bend to my will… What to do first? Make you lick me out, stuff you to the brink with vibrators perhaps? Decisions, decisions…"

Sunset sobbed, as the group entered the woodland mansion. With nothing but untamed forest for miles around, there would be no escape. She knew at that moment that she was doomed to be the slave of those three, and whatever monster they had turned her friend into… For the rest of her life.

Author's Note

A dark ending, but those are the fun ones :3

I hope you all enjoyed! Remember to show Lunargue some appreciation too! This story would not exist without his artwork.