"What's happening?" said Sonya.
"I think It's actually working!"
"Well that was money well spent"
The sensation in their legs only got stronger and stronger. It felt as if their legs where on fire, so hot that the sweat was evaporating into their tails. Though the pain was too much for them to move, they could definitely feel what was happening down there.
The heat settled down and the two sat up. Too bewildered, too scared to move. "I think it wor-" Derek said as the pain returned.
"Derek are you okay?!" Exclaimed Sonya
She inched her way towards him, crawling on the sand as she couldn't walk with her new appendage.
As she approached Derek she noticed how realistic his tail looked. Glistening in the sunlight, the muscles contracting, The pattern of the scales, all looked real.
"Derek what is happening?"
"I can't feel my legs", he mustered, "What's happening?"
"I don't know!" Exclaimed Sonya. "I feel jus-." She then noticed some strands of Derek's hair. They appeared to be growing longer and longer. She rested a few in the palm of her hand, and sure enough, his hair had increased by a few inches since they put the tails on.
"Derek, honey, I think you're turning into a mermaid."
"You don't say." Retorted Derek "That's kinda why we bought these tails."
"No Derek! I think you're turning into a MERMAID, not a MERMAN!"
"What? No no no no. That can't happen, I'm a guy!"
He tilted his head up, to observe if what Sonya said was true, when long strands of brown hair obstructed his vision. "It's down to your shoulders now." Said Sonya.
"How is it looking down *there*." Gestured Derek.
"I can't tell, everything is obstructed by your tail." "Don't worry hun there's going to be a way to fix this."
Something caught Sonya's attention as she went from looking at Derek's "nether regions" to his face.
"Derek, I think you're growing breasts." She said in a condescending tone.
"Don't joke about this Sonya, what if i won't be able to change back!" Yelled Derek as he covered up his small breasts. His voice was noticeably higher.
"Hey sorry for trying to lighten the mood."
"Well It's not helping" Derek pouted as he sat up, grabbing his tail. His hair was now down to the middle of his back, long and strait, and it was still growing. His breasts where at about an A-cup, and his face looked much more feminine than previously. Thinner eyebrows, longer lashes, a rounder jaw. If someone where to just now meet Derek, they would've assumed he was a girl.
This sight was strange to Sonya, The man she once knew and loved was now a woman. "Derek I just wan't you to know, that no matter what happens, I will always be at your side."
"Thanks Sonya, that means a lot to me."
The two embraced each other on the beach as Derek continued to change. Her hair extended all the way past Her waist, breasts at a ample C-cup. Her torso was much more smaller and curvier than when she was a male. The two sat there silently watching the waves for a while, until Derek broke the silence.
"I should probably get something to cover up these breasts." "Maybe some kelp or seaweed or something."
"Same sense of humor" Responded Sonya.
Derek waited a few seconds. "Are you jealous?"
"What?" Replied Sonya.
"Mine are bigger than yours." Said Derek
"Gee you sure are funny." Sonya said sarcastically.
"In all seriousness though, what are we going to do."
"We'll," thought Sonya, "We could go for a swim, but i'm guessing you wan't to head back to the store and confront that woman."
"Yeah," sighed Derek, "That's going to be difficult seeing as how we don't have legs."
The two pondered their situation. "Unless," Derek snapped,"we might get our legs back if we move to dry sand."
"Derek, that just work in movies and TV, how do you know that will work?"
"What other options do we have?"