It's all fun and games until someone's cock becomes out of control for medical reasons. Especially if that someone is in the family.
Genevieve learned that the hard way.
What began as a family trip to Thailand turned into something else when they went to an exotic beach. Her parents were the brainy types, so they spent their morning with a group of other tourists and a Thai tour guide who was an expert in local geology and the ecosystem.
She and her brother, however, were ordinary college students with ordinary college needs, looking to swim and have fun. Genevieve wore a sexy bikini. Mike wore swimming trunks. They'd been on plenty of family vacations together so they were used to seeing each other in swimwear.
They did some light swimming in the shallow end of the water where the waves hit the sand, getting warmed up for a deeper swim to follow.
"Feel like a race?" Mike grinned.
She grinned back. "Name it."
Being on the college volleyball team had really honed her physique over the past year. She was certain it would give her some kind of competitive edge in their everlasting sibling rivalry. She always loved putting her brother in his place, but it was only occasionally that she got to be the victor. Today, she was in an energetic mood. Confidence was flowing through her blood. Yes, she was up for any challenge.
"Let's see who can swim against the tide fastest," he said, pointing to where the water changed color. "Just up to there. Nothing dangerous. Then we swim back."
"What if I win?"
"You won't. But the winner gets to sleep on the bed next to the window for the rest of the trip. No more alternating."
"Hmm..." she pretended to think. "You're on!"
Genevieve dove into the water first and went full force against the oncoming waves. All that working out at college was really paying off. She didn't have to check if her brother was on her tail; but she knew he wasn't far behind. They were both competitive, afterall.
When she came up for air, she saw that her brother was catching up with her. She pushed harder. She had to win this.
Unfortunately for Genevieve, her brother's strength and stamina gave him a big edge. She had better technique, but Mike had better muscles. He won this time, but Genevieve was right behind.
The race ended further from the starting point than anticipated, and they were both gasping for air.
"Lucky you," Genevieve said laughing as they trod water.
"Damn, you're getting good," he said back, still gasping for air. He glanced over Genevieve's shoulder. "Holy shit. Look over there."
They looked to the right and saw a series of massive rocks and boulders which appeared to have formed a small hill. It was unlike anything they had ever seen back in America.
"Isn't that where Mom and Dad went?" Genevieve asked. "On that tour."
"I think so. It's kind of dangerous apparently, so if you're not a local, you have to go with a tour guide."
Genevieve couldn't take her eyes off it. "What's so dangerous about it?"
"Caves, I think."
"Bummer. We should have gone with them."
"We can still go," he said deviantly. "It'll be our own private tour."
"Sure, if you're up for it," she replied, quick to rise to the challenge.
"I am. But can you swim that far?"
She splashed water at his face. "Let's go slow this time. My heart is still pounding."
"Mine too."
They swam side-by-side, at a much more leisurely pace. The closer they got to their destination, the more excited they became. This was what Thailand was all about. Adventure.
After a 15 minute swim, they were almost there. Their arms were tired but they knew they'd be okay after some rest when they reached their goal.
"I don't see anyone," Genevieve said as she emerged from the water. "It's kind of scary here."
"Who knows. They might be in a deep cave somewhere. There's a number of them if I'm not mistaken."
"I'd love to have a peek. I've never seen a cave before."
"Ahh!!!" Mike hollered suddenly. "Shit!"
He jumped up as soon as he reached the shore and limped out of the water.
"That's not funny!" Genevieve screamed.
"Something bit me," he said as he inspected his left thigh.
"Really?"
"Look."
Genevieve could see two small holes on his left thigh. The skin was red but it wasn't bleeding.
"Jesus. What the hell was it?"
"I didn't see it," he replied. "It stung me and swam away."
"Should we swim back to the resort? It might be serious."
"I need a little rest before I can swim back. How about you?"
"I need rest too," she said.
"In that case, we might as well check out a cave while we're here. It beats sitting around doing nothing."
"Can you walk?"
"My leg feels fine," he replied. "It's probably nothing."
Genevieve grinned, eyes sparkling. "In that case, I'll race you!"
She immediately positioned herself to sprint to the nearest cave.
"Hey! Same time!" Mike said.
"I'm only joking. Come on, let's stroll to that cave over there, then we can go back. I'm worried about that bite. We should get you some treatment. Afterall, we don't know what it is."
They walked over to a nearby cave entrance. It was a small one. Narrow. There was light shining inside, so there were probably other openings.
After a short while inside, they came to a dead end and saw a hole down on the bottom of a cave wall. It appeared to be well lit on the other side of that hole.
Genevieve bent down to peer through the hole.
"What's on the other side?" Mike asked.
"It looks stunning," she replied. "I don't know how to describe it, but it looks like a pond with these crystal things which naturally formed from the top. It seems like sunlight is filtering into the space too."
"Well, let's squeeze through the tunnel and go have a look."
"Are you sure you'll fit inside? Because I know
I'll
fit in there. I'm lean and slender. You may be in shape, but you have broad shoulders and muscles."
Mike knelt down beside her and peered inside. "It'll be super tight, but I'll fit. It looks amazing in there."
"You're sure you'll fit?" she persisted. "You're sure, sure? Positively sure? Because if you get stuck in that tunnel, we're screwed."
He kept analyzing with his eyes. "I think I can make it in. I'll go first. If I get stuck, which I won't, then you can pull me out."
"What a joy."
"Here it goes."
Mike crawled on the wet surface and made his way into the tiny space. He held his arms forward and exhaled in an effort to make his body slimmer. He felt as though the air was being squeezed out of his lungs at one point, but he made it.
Once on the other side, he stood up and breathed deeply. Then he looked down again.
"Are you coming?" he asked through the hole. "It's really amazing in here."
"Yeah, hang on."
Genevieve performed the same maneuver. It took much less effort, but it was still a mission. While her slender hips and torso were an easy fit, her tits felt plenty of discomfort as they pressed against the rocky surface.
Once they were both inside, the siblings marveled at the exotic cave. It was unlike anything they had ever seen on tv. They seemed to be in the midst of a cave complex. It was like a maze. There were cave entrances in all directions.
"Let's not even think about exploring more," Genevieve said. "We'd get lost."
"I know. This is overwhelming enough. God, look at this place."
Their eyes marveled at the structure which was created entirely by nature. They took a few moments to walk around the pond area and peek inside several of the cave and tunnel entrances. It was simply majestic.
"Ouch," Mike said suddenly, limping a little bit more.
"Are you okay? Is it hurting?"
With concern, she touched her brother's bare shoulder, holding on to him to make sure he wouldn't fall.
"I feel weird," he said. "I don't know, it's like a pressure is building up inside of me."
"Can you swim back?"
"I think so."
