Jason wandered across the beach. He saw a pretty girl sitting alone. She looked like she was in her late teens or early twenties. She was blonde, and with a slender build. She smiled at him. It seemed like she'd noticed him checking her out. He could approach her. Normally, he'd feel way too old, but here it wouldn't be strange at all. He walked up to her.
"Hey, I'm Jason."
"I'm Julie. Nice to meet you."
Jason went for what he thought was a simple ice breaker. "What kind of room do you have?
"You're not supposed to ask about that." Julie looked a little offended.
"Oh, I'm sorry," he apologized.
Julie giggled. "I'm just messing with you, I don't mind, but you should know that there are others that do mind. People like to immerse themselves here. Talking about transformations, or their normal life can ruin the experience for some."
"I guess that makes sense. It's my first day here, so I am not used to this whole thing yet."
"First day? That must be exciting. I have a room in the age wing by the way."
"Oh, the age wing, me as well."
"Have you used it yet?"
"Yeah, I've used it to become 20 years younger, 45 to 25."
"Heh, I guess we're not too different. I am actually 57."
"Really?" Jason was surprised. Of course he was well aware that people could change their age, but it was still weird to think that this young pretty girl was in reality significantly older than his real self.
"Yeah, but now I am 19, and enough of that." Julie smiled. "Let's go for a swim." She grabbed Jason's hand and dragged him towards the shore.
The two of them swam and played around in the water.
"Come." Julie made Jason follow along. They swam into the ocean to a rocky island not that far away from the coast.
"Are you tired?" Julie asked him as they stood on the island.
"No, I'm not." Jason did a little flex, showing off how fit his 25 year old self was.
"Well, I want to relax a little." she grabbed his arm, and pushed her body unto him.
Jason blushed. He wasn't used to a woman being so forward. Was this common in the resort?
"You're so cute." Julie giggled. "Come here.I want to show you something."
Julie showed Jason a little cave on the side of the island. A cave that importantly pointed away from the shore.
Julie let her hand walk down Jason's abs, and underneath his swimwear.
"What if someone comes and sees us." Jason objected.
"Probably won't happen, and so what."
Jason felt her reach his dick, and began to stroke it. He was already rock hard.
They continued on fooling around, touching eathother, and soon they were full on fucking in the cave.It was intense and raw, doing it out in nature, the ocean just a handful of feet away. Julie was bent over. Jason was thrusting, enjoying her perky ass.
"God," Julie moaned.
Jason came, shooting his load into her.
"Ahh," she yelped.
Heavy breaths. They sat down next to each other. They were both salty and wet, part sweat, part seawater.
After some time passed and they both gathered their bearings, they swam back to the beach.
"What do you want to do now?" Julie asked.
"I am not sure." Jason replied. Though, he did kind of want to check on Sally, but he didn't have any way to contact her.
"Ooh!" She exclaimed "Want to do something really fun and kinky?"
"What could that be?" Jason was intrigued.
"Are you into incest?"
"What?" Jason was confused. "What kind of question is that?"
"I figured we could go to my room and play around with some stuff, maybe some incest roleplay." Julie squeezed his arm and pressed her breast unto him. "It'll be fun, we'll have some super taboo fun with none of the ugly downsides."
"O-okay." Jason agreed. He wasn't super keen on this incest stuff, but he was very into Julie and still plenty horny, so he figured he'd follow along. Julie seemed experienced with this place, so he guessed he should follow along with her ideas.
…
"Ta-da, this is my room!" Julie gestured.
The room was a part of the age wing, so it was not too far away from Jason and Sally's room.
"Okay," she started. "Just follow what I'm saying, and if it gets too weird, feel free to back out."
"Alright." Jason wasn't sure what he'd gotten into.
"So, 16 will be your new age, alright? Just think 16 and accept that you'll let me have control."
Jason did as she said. He felt his body shift. His perspective lowered, and his body shed some muscle as he slimmed down.
Looking in the mirror, he saw that he wasn't only getting younger. His hair was blond, and his face was of a total stranger, or well the face did resemble someone, he resembled Julie.
"Okay, now for the fun part," Julie said. "Let the mental changes manifest."
He did as she said, and he felt lightheaded for a second.
"How're you doing bro?" Julie smiled.
"Uhm, fine," he answered his sister.
Wait, this was trippy. Jason looked at Julie, and he remembered how they booked this trip together, how they traveled without their parents. Their parents, he remembered mom and dad, and growing up with Julie, and so much more.
He sat down on the bed that just spawned there. There were now two beds in the room now because it was now the both of them's
"Trippy, isn't it." Julie giggled.
"Yeah." All these memories, he knew they were fabricated, he knew that he was in reality a middle aged dad, but those memories were vague and without warmth. Like he knew all the facts, but there were no details. He couldn't even remember Sally's face.
"Let's take a bath." Julie suggested. "I am sick of being salt and sticky."
"Me too." Jason replied. "Can I go first? You always take forever."
"We can go together like we used to."
"What?" Jason thought back. "Yeah, he and Julie had bathed together before, but that was years ago. It's not like they could do it now."
Julie grabbed his arm and dragged him to the bathroom. "Let's go."
"No," he protested, but he did not resist. He followed along and undressed, though leaving his swimwear on.
The bath was pretty roomy. It could probably fit them both, though there wouldn't be much space left.
Julie switched the water stream on, letting the bath fill up with warm water. Jason stepped in and enjoyed the feeling of the water, but he only needed to look away from his older sister for a moment to see that she was completely naked, no swimwear even. He couldn't keep his eyes from being drawn to her chest.
"Julie! What are you doing?"
"What do you mean?"
"You're naked!"
"So?" Julie giggled. "You're the weird one for wearing shorts in the bath."
She entered the bath, grabbed the waistband and pulled it down. Not a clean yoink, but she acted quick enough, so that Jason barely had enough time to react.
"Give it back!" He commanded.
"Why? Why? Is it because you want to hide your boner?"
He was beet red.
"Don't worry bro," she smiled. "It's natural. You're a boy. I'm a girl. Of course you'll get horny."
"I am not horny," he defended himself.
"Mhm, yeah," she giggled.
Jason was absolutely mortified. This was way too awkward. He felt so guilty looking at his sister even if he knew on an intellectual level that this was all play and games.
"Any girls at school you're into?" Julie nonchalantly asked, acting if there was nothing strange about her being naked.
Jason ignored Julie's body for now, and answered her question. "Yeah, actually. You know Maria?"
"Oh Maria, I don't remember her. What does she look like? She can't be prettier than me?
"Well." Jason decided to try to turn the teasing around. "She got big boobs, unlike you."
"Oh?" Julie was a little taken aback, but was quick to counterattack. "Mine are at least big enough to give you a massive hardon you creep."
"Well, you're the weirdo pervert that prances around naked."
"Pfft! Being naked is completely natural. There's nothing perverted about that."
Jason felt himself getting annoyed with her. He recalled all these arguments, and how she always acted all bossy and superior since she was three years older. He wanted to shut her up, and as he stared at her naked body, he decided to go for it. He went and grabbed her wrists.
"What are you doing?" she struggled, but Jason did not budge, he was much stronger, and had no trouble overpowering her.
They looked eye to eye, their faces so close, close enough for him to taste her breath, sweet. She closed her eyes, and he went for a kiss. She kissed back. He enjoyed her sweet taste, yet somewhere in his mind, there was a voice screaming that this was wrong, but that did not stop him. He kept on kissing her, letting his body keep moving, touching her, one hand fondling her breast. This was the first time he ever touched a boob, well it wasn't, but it felt like it.