Not everyone came to the beach just to have fun. There were some people who went there for work-related reasons. For instance, Katie and Robbie Rosenberg were studying the fish in the area. They had just spent quite a bit of time studying the trouts, stingrays, and other fish in the area. As they walked out of the waves, the water sliding off their wetsuits, they were talking about their latest finds.
"The sea bass are definitely spawning a lot in this area," said Robbie to his wife, "The large amount of egg sacs we've found definitely confirms it."
"Well, it's good news for the fishermen around here if nothing else," said Katie, "Plenty of people are going to come out with their-" She paused as she saw all the women who were on the beach. "Was it this crowded when we went into the water?" asked Katie.
"Not with so many women," said Robbie, "I would have remembered."
"Of course you would," said Katie dryly.
Just then, a pair of surfer girls walked past them. "Scuse us," said the one in the bluish-green bikini, her hand happening to brush Katie's hip.
"We've got some big waves to catch," said the one in the glove top, her hand happening to touch Katie's butt.
Katie wiped her hips and butt as the surfer girls left. "If I didn't know better, I'd say they were trying to grope me," said Katie.
"They're only teen girls," said Robbie.
"Well, it would be different if they were..." said Katie before she started feeling funny. She didn't know that her hips and butt were starting to swell up, filling up more of her wetsuit. The sleeves of her wetsuit were also shrinking, leaving a lot of her arms and legs bared, which were more toned than they had been before. Her wetsuit was also getting tight against her chest as her breasts were growing larger than they ever had before. Her wetsuit shrank tighter before it started opening up and separating in places. Katie's blonde hair, which she had been keeping in a bun, got loose and stumbled down her back. The formerly modest woman in a wetsuit was now a fabulous fitness model in a blue bikini.
Robbie looked at his transformed wife with disbelief. "Katie? What happened?" he asked.
Katie hefted up her D-cup boobs and said, "I'm not sure, but I like it a lot."
"But, people just don't change like that," said Robbie.
"Well, something's got to trigger it, and I think I know what," said Katie.
"What?" asked Robbie before suddenly finding himself being kissed by Katie. However, there wasn't really much of her usual affection in that kiss. It seemed more about just kissing than any passion.
Robbie felt dizzy as he felt himself changing. He was already shrinking in height as his black hair was growing longer. The muscles he had built up with all his swimming were now compacting down to a more slender shape. He could feel his wetsuit altering, exposing more skin. His torso was feeling rather strange as he started found himself bulging out in all the wrong places. Katie's big breasts were being pushed against by a similar pair growing on Robbie's chest. Her hands were rubbing up and down a thinning waist much like her own. Robbie gave a moan as he felt his manhood reversing itself shortly before Katie's hand reached down the new bikini bottom and started fingering her new pussy.
Though the marine biologist couple had changed a lot, there were many things that remained the same. They were still married, though they were a sexy same-sex marriage than a traditional one. Robbie still had her old name, but now it was short for Roberta. And while they were still marine biologists, they were also part-time bikini models. And their bodies looked particularly fine in their bikinis.
Robbie was fingering her wife's pussy, not caring if anyone saw them. The two women made out and fingered each other for quite some time before they moaned into each other's mouths. Their pussies clenched and drenched their bikini bottoms, not that anyone could tell the difference.
Robbie pulled away and said, "That was a lot of fun."
"Feel like going for another swim?" asked Katie.
"Maybe we should do some skinny-dipping," said Robbie.
"I like the way you think," said Katie with a purr.