She had always been so ambitious, wanting to help the entire world if she could help it. Katrina simply didn't know when to stop giving. Though it made Joanna worry for her sometimes, to know that there were people so selfless out there... it did comfort her, in a way. And now, perhaps, that comfort could be shared with so, so many people.
Of course, she agreed wholeheartedly with Katrina's sentiment. No human being alive deserved to be denied the joy they now shared, no matter how awful they were, no matter what they might have done. Even Katrina's jerk of an ex-boyfriend, Joanna couldn't bring herself to feel malice towards - a bit of pity, perhaps, but for the most part, a desire to forgive him, to let him experience the joy he was so clearly missing from his life.
But they would have to start somewhere. Joanna was fairly certain that they couldn't just blanket the whole world... but perhaps on a smaller scale, they could begin sharing the gift. An idea crossed her mind, and through the bond formed by their swirling lower bodies, Katrina instantly sensed the idea. A wide, excited grin spread across her face, all that bubbling energy coming to the surface. "Oh, that's perfect!"
With dual grins they slid down, their upper human forms retreating into the black and silver slimes. Just as quickly their two bodies, moving in perfect unison, slid off the bed, pulsing along the floor at a breakneck speed. They quickly found their target: the vents near the floor, the grates easily large enough for the pair to slip through. Their compressed forms continued to zoom along, following the cramp and dark pathways of the ventilation system to their destination.
After a bit of trial and error, their forms drooped down from a vent in the ceiling amid the room they had targeted. The apartment was known for its excellent water filtering - the stuff from the tap was usually better than anything bottled. The only way for any sort of contaminent to slip in was to do so after the main filter at the large water tank in the basement... though neither woman would've considered themselves contaminants.
The swirling mass of the pair had little issue finding a gap in the tank's seals large enough to slid part of themselves through. An incredibly thin layer of themselves would do, something that would be detatched and spread into the water. It would be agonizing to do so - the amount required to ensure fill distribution would be far greater than what Joanna had sacrificed to convert Katrina. But the pain would be worthwhile, for the revolution of ecstacy that it would usher in.
With screams of pain racking their forms, the two split off a part from each of their liquid bodies, two fist-sized globs that quickly attracted towards each other. Cut off from the mind of either woman, the blobs were not unlike the thing that had first bonded to Joanna, beings of pure instinct, solely focused on one goal. The two piles quickly entwined, becoming a single organism as it compressed itself down to slip through the tiny crack and into the container.
They could sense it still through the steel skin of the tank, bonding to the interior wall like a waterproof glue. There it would begin its mission: dissolving itself very, very slowly, using a tiny portion of the water to regenerate what was lost. Thousands of tiny cells, each one enough to begin the conversion, would spread through the water supply, reaching every inhabitant through the water they drank and bathed in. Within a day or two, virtually everyone would be exposed... and in just as short a span of time, they'd know they joy that Joanna and Katrina now experienced.
Tired from the effort, they quickly slid back up the wall, navigating their way to Katrina's bedroom once more. Their forms finally split apart once on her bed, completely disentangling as they regained their humanoid appearances. After a few moments, the two were laying naked against each other, breathing heavily yet still finding the energy to wrap their arms around each other, sharing an affectionate kiss that went on for quite some time. The feel of each other's bodies, even in their old human forms, was simply heavenly.
"I can feel it nearby," Katrina excitedly whipsered into Joanna's ear as she laid her head down next to the other woman's. "It's in the pipes, flowing around. I bet it's already found a host or two."
The brunette grinned, turning to stare into her partner's eyes. "I just wish we could be there for every single conversion. It's so... so wonderful."
"Part of us will be." She reached up to gently caress Joanna's face. "You and I, the love we share right now... it'll be the seed of a beautiful world." She sighed in contentment. "I just want to ask... one thing. No matter how much joy there is to find in this new world... please..." She leaned in to plant one more soft kiss on Joanna's lips. "I want to be with you forever."
Though her new body could hardly produce tears, Joanna was sure some were about to well up. "Forever. I promise."