Heather and Diana flew high and looked around looking for some likely place to take a lot of casualties, and far out to sea they saw a cruise ship. It would probably be full of people there to be turned, and even if they knew about the outbreak going on, they wouldn't be the least bit worried about it being isolated at sea. They flew straight to the ship, landing on its highest part and planning their action, as they wanted to make sure that everyone on board mutated before any rescue team arrived. From there they saw three girls (Carla, Sally and Tiffa) sitting at a table on the front deck, they were drinking and talking, and decided to start with them, infecting them without them noticing.
The twin harpies flew close to the girls and landed softly on the floor rail above them, having a great view and space, where they jerked off, being careful not to moan, and came aiming their cock in order to mix a little of their semen in the girls' champagne.
"Don't you think it's too hot in here? I'm sweating like crazy." Sally said
"Strange, I'm sweating too, the wind is cool and we shouldn't be sweating like this. Strange, I'm sweating too, the wind is cool and we shouldn't be sweating like this." Tiffa said
Agreeing, the trio got up and headed for the showers, but halfway through, Carla said "Hey girls, there's something wrong with me. Why is my sweat blue?"
"And mine is green." Tiffa said
"mine is re..." Sally said, running her hand over her sweaty arm, opening a slit when part of it got into her fingers "Oh no, we're not sweating, we're melting.
"What?" Tiffa and Carla questioned, shocked by their friend's realization, and looked at their own body.
The three friends saw that they had no more feet and everything from the knee down had melted into a puddle of goo, with Carla's being blue, Tiffa's being green and Sally's red.
"Don't tell me that the mutation spurt occurring in the nearby town has arrived her." Carla said
"But how? We're a long way from the mainland, so we should be safe." Sally said
"We forgot about that possibility, look." Tiffa said pointing to a high point towards the sea, where the others looked and saw Heather and Diana flying, standing still in the air as they watched the trio transform.
"No, a flying mutant came all the way here." Sally said.
By now, everything but their heads and arms was a puddle of goo, which didn't take long to melt either.
After turning into puddles of goo, the girls discovered that they could switch between human and puddle forms at will, however in human form they still had their transparent goo coloring, and they also had a large dick and balls between their legs now.
"It's not as bad as I thought. I'm enjoying my new me." Carla said
"Me too" Tiffa and Sally agreed
Analyzing their new bodies they noticed that there was a spot where they were touching and, just in that place, the goo was pink.
"See this different color part. Can we mix with each other?" Sally asked
"I don't know, but I'm interested in trying. Here we go?" Carla said and with a positive confirmation the three slime girls threw themselves at each other, with that they blended into a single can of totally pink slime, which then rose up into a 14 foot tall slime girl who was three four feet long cocks between her legs.
After exploring herself a bit, the pink slime girl split again into the three friends, who resumed their original slime colors after separeting.
"That was cool, we merged into a single creature." Sally said
"It seems we can mix and unmix at will. I realized that we still have our consciences while we are merged, but what emerges from our union is a totally different girl with traits of the three of us mixed together." Tiffa said
"It seems we can mix and unmix at will. I realized that we still have our consciences while we are merged, but what emerges from our union is a totally different girl with traits of the three of us mixed together." Carla said
"How about Cafly? She's a fusion between the three of us, so it's only fair that the name is a mix of ours." Sally said, Tiffa and Carla agreed.
Carla, Sally and Tiffa looked at Heather and Diana, thanking them for transforming them, merged into Cafly and in her liquefied form entered the ship's plumbing, from where they would look for people to transform as well.