As Michelle instructed Tiffany, Brianna, and Guadalupe on how to attach their cocks, Melanie ran her mocha fingers down the shimmering scales of Tori's new tail. Each individual fingernail-sized scale was smooth to the touch like a salmon's, and they overlapped each other in an emerald mosaic of raised ribs.
"Your tail's just so pretty!" Melanie smiled admiringly. "I'd love to have one of my own."
"Thanks," said Tori. "I'm sure Tiff would be happy to have you join."
"Sure thing," Tiffany smiled as she stroked her dolphin dildo. "I'll even let you grow your tail now and do the registration paperwork later. How's that sound?"
"Terrific," Melanie said brightly.
"Then I'll get tor work on you as soon as I finish... AAAAHHHHHHH!!!" Tiffany interrupted herself as she, Brianna, and Guadalupe suddenly blew their massive loads, their cetacean dicks fully attaching to their tails as they rode out their orgasms.
Michelle felt her cock harden as she watched the three mermaids jizz into the sand. "Nicely done, girls! Those dolphin dongs should fully be part of your bodies now."
Tiffany gave her new dick and experimental tug before letting it slide back into its protective sheath. "Thanks, 'Chelle!" She then slithered over to Melanie, flopping her sand-covered blue tail next to the black futa's coffee-colored legs. "We'll use the same paste I used on Tori. What color tail would you like. Mel?"
"Yellow would be cute," said Melanie.
"Then yellow it is!" Tiffany grinned as she picked up a bottle full of yellow paste. She squeezed a wad of thick yellow paste onto her hand and began to liberally smear it over the lower half of Melanie's body from just below her belly button down to the soles of her feet, just as she'd done to Tori. The only thing in that range she avoided as Melanie's penis. Who wants a scaly dick, after all? Melanie tried not to squeak with embarrassment as Tiffany's paste-coated fingers glided over her ass and into her asscrack.
"Aaaaand we're done!" Tiffany said proudly. "Nothing to do now but wait."
And wait they did. After fifteen minutes, Michelle broke the silence. "Hey, shouldn't it be happening by now? It didn't take anything like this long with Tori."
"Agreed," said Brianna. "The paste should've been absorbed by her legs ages ago."
"Her tail should be halfway through forming by now, Bri," Guadalupe agreed.
"How do you feel, Mel?" Tiffany asked.
"Not great," said Melanie. "Not terrible, but not great. My legs are itching like crazy."
"It should be a pleasurable tingling sensation," said Tiffany. "I honestly don't think the paste is going to work."
"I bet it's another allergic reaction," Brianna suggested. "Remember when Olivia tried to use the tail paste?"
"Yeah, the same thing happened," said Tiffany. "I guess the paste just doesn't react well to your body, Mel."
"What a shame," said Tori.
"So I can't become a mermaid?" Melanie sighed disappointedly.
"I didn't say that," Tiffany said resolutely. "I'll just have to find another method. We have a few others, just in case the tail paste doesn't work."
"You don't have to do it right now," Melanie assured. "Surely there's other mermaids who want dicks installed. I wouldn't want to hold it up."
"Hey, your desires are important, too, Mel," Tiffany assured her newest recruit, playing with her new dick as she talked.
"Yeah," Michelle agreed. "You deserve a tail."
"Just trying to be a good team player, Tiff," Melanie shrugged. "We're taught to put others before ourselves in the Young Christians. Oh, a mermaid can still be a Christian, right?"
"Of course," smiled Tiffany.