Corn
You really are in my head~

Echoen
Echoen sweeps hir wings across your synapses 
"If it even is your head anymore."

Corn
Corn grunts as his head slightly fuzzes over, his muzzle looking more bat-shaped by the second.
"Huh...?"

Echoen
Shi trills pleasantly, pressing breasts on either side of that reshaping skull. Tall, towering ears spring up to tickle hir chin.
*Shh, there we go. Let the transformation take you, I'll settle in smoothly then."

Corn
Those breasts make him yip happily as he nuzzle against them, but even as his noises ascend in pitch, he finds himself already chirring - you already looking back into your own eyes as similar tits sprout on my chest.
"Oouh, that feels...~ Am I... no, you... hhh...~"

Echoen
Similarly swollen, weighty, full and lush batty bosoms swell forth from his chest... hir chest... as the transformation spreads downwards. Hir sapphire eyes glitter delightedly as shi makes eye contact with hirself, identity already settling atop and enveloping the one that used to reside within the mind shi's subsumed. Delicate yet strong wing-fingers reach down to caress, cup, and stroke those swelling breasts.
"That's a good girl. Settle in, masturbate, and I'll find where Corn went. He's almost finished something for us..."

Corn
The bat smiles in excessive delight as hir breasts are rubbed over, hir eyes meeting hir gaze as shi bites her lip with anticipatory bliss. As hir wings slip down between hir legs, wrapping around hir batty cock, she began pumping as her personality grew in - leaning in to kiss hirself on the cheek, chirping softly.
"Go for it.~ We'll be here.~"

Echoen
The cheekpeck was applied not just to the bat standing above/behind hir, but to hir own cheek as well, from hir second head. Two-headed batties were totally the norm, and as fingers clutched around stiffening dark shafts, so were multiple members normalized and the fat swells of pairs of balls as well.
The standing batty is likewise afflicted, even as shi draws away from hir counterpart to trundle taurically off, sacs swinging between hir tauric hind thighs. "Corn! Corn, sweet corn, where are you?" Shi echoes, already assured to not find him as his clones shi keeps as backups are already converting into more of hirself. 

Corn
Hir second head would let out a gentle sigh as the kiss faded, stroking hir dual-members - the coffee-dark, rubbery skin oozing pre as hir multi-balls churned with anomolously spawning cum.
As shi searched around, the only echoes that would return would be hir own voices - churrs and cries to the negatory landing on the dual-ears each of her tripled heads sported, hir sacks dragging along the ground with the ten or so balls contained therein. As her prehensile cocks snaked, they would suddenly be wrapped around by multiple clones of hirself, brushing up agaonst the sides of hir double-taur body.
"No luck?"

Echoen
Shi shakes hir head, which is an ordeal with so many, especially when simply, smoothly merging into more of hirself to form six-shoulder-wide battyselves, nerves and neurons conencted to share thought and sensation without the need to speak. But shi does, for hir own benefit, of hir sonerous chiropteran voice. "No, we may need to recreate him." Shi breathes, another battyself slipping past pussylips to sink, plunge deep into hir own depths. Throbbing, twitching, heated and swelling larger with each throb. "The good thing about Corn, is he grows so quickly." 
The orgy of Echoens spreads through to even the distant clones, wombs swelling even without the need for catalyzing corruptive cum. Corn, or the dozens of variations of him that have been exposed to Echoen, soon finds himself slipping past batty pussylips and onto the floor, or into waiting wings and breasts, welcomed back to an existence they never left. But shi doesn't stop, continually producing and reproducing more of him, searching to find the proper mixture of identity, personality, potential, and physique that would satisfy even his most intimate friends as the 'real' him.

Corn
As the pile of Corns being birthed by countless iterations of the batself, pussylips drenching every inch of available ground with veritable liters of birthing fluids, the sheer number of Corns in such close proximity to the number of Echoens found themselves overrum by the corruption they'd been created to resist - and soon, the writhing piles of half-formed batselves began to shift and merge, joining the single conciousness with millions upon trillions of fractallizing, mutation-ridden batselves. 
She was mounting hirselves in every single hole of every single mile-long taur-train, billions of wombs bearing billions of Corns as the search continued. As the sopping folfs continued to be brought into the light, pushing past the rubbery, darkened lips of Echoen masses kilometers long and wide, one eventually stood up straight - and immediately, every Echoen would stand stock still, looking towards his location as shi giggled in glee.
"There you are!~"