There was still an ongoing debate inside Allison's head, trying to determine whether or not to stay in her fantastical new form, when her attention was drawn to Catherine once more. The platinum-blonde's confident smile had changed, turning into a look of puzzlement as she backed away from her mutated overwrite-clone. Her hands shot down, grasping between her thighs at a spot just below her slit where something seemed to be... growing?
Allison scrambled to her feet, watching and listening as the growth began to accelerate. She recognized what might be happening immediately - and strangely, it didn't seem to be painful for the rich woman before her. The moans that left her mouth as the protrusion increased in size were not pained, but rather, the same sorts of sounds she had been making in the throes of her passion. She was enjoying this, somehow.
She found her own excitement - and a particular new organ - rising as the mound just below Catherine's entrance split from a single lump into three. Two of them were spherical, large round objects within a single bag that hung down between her long, lithe legs. The third section instead took on a tubular configuration, sprouting out a considerable distance before the end of it rounded off. The instant a small hole had formed at the tip, a sticky substance was already trickling out.
The newly-created rod was already rigid as steel as Catherine gripped it in her hands. Her eyes floated up from the marvelous endowment to the identical organ possessed by Allison. At the same time, they both seemed to realize that the configuration, under the existing entrance rather than over, presented a certain compaitability; Catherine, however, was the one to make the first move, throwing herself back onto Allison's member with a cry as she slammed her own into the young woman's moistened sex.
A shared moan of exictement at the sudden resumption of their embrace was followed by mouths and tongues becoming entwined, exhaustion mutually burned away by the excitement that this unexpected change provided. Some rational part of Allison's brain raced to try and understand - she hadn't seen Catherine consume any of the elixirs. Perhaps, then it was her very own release that had provided a vector for the mutations. Would all the changes that she had experienced then be inflicted on Zhang?
The answer, it seemed was a resounding yes. Such was confirmed as the leg wrapped up around Catherine's rear end was pushed back by a new mass forming, a new pair of legs that pushed out to render her in a quadraped form. Their previously slender and lithe form quickly began to feel bulkier against Allison's skin, gaining definition and mass just as her own mutated legs possessed. Soon she wasn't putting a leg around the older woman at all, instead finding that Catherine's front pair had thrown themselves up around her lower body.
Four strong arms pulled the woman's torso in tight as the changes traveled upwards. Against her lower pair of enormous mammaries, she could feel two little hills pushing out of Catherine's chest, rapidly forming into mountains alongside the increasingly soft and yielding upper pair. In moments their chests were a mushed mess of eight absurdly large breasts jiggling and squishing against each other. Every little moment caused the sensitive flesh to tremble with delight, only throwing both women further into the wild heat of passion.
The buckling of hips against hips was soon enhanced by a pair of strong, mighty arms from Catherine, matching the higher pair that was busy entwining its hands in Allison's thick mane of platinum hair. Excitement like she'd never felt before building, building, growing with every little alteration to her lover. With the last toning out of muscles along her abdomen, the transformation completed, and so did both women, near-simeltaneously unleashing loads into each other with shared cries of ecstacy.
Even as they basked in the afterglow, they could scarcely pull apart or remove their members from each other, or indeed, even manage to stop dancing around in each other's mouth with their tongues. Even in the midst of this, however, Allison wondered something: if her own juices had so utterly altered Catherine, then what was her lover's own release going to do to her in turn?