Set before Annabeth, Luke and Thalia get to camp. I have made them a bit older so Thalia and Luke are still 14, but Annabeth is nearly 13.

"Hey Thalia, can you come in here for a sec?" Luke whispered to her.

Annabeth was still sleeping in the house they had used for shelter the night before. Thalia tried not to wake her, as she got out of the blankets wrapped around them. She stood up, and snuck out of the room. She looked around trying to find Luke, but she couldn't see him. Then someone grabbed her from behind.

"I love you." Luke said from behind her.

"Jesus, don't do that!" she squealed.

"Careful, you'll wake Annabeth."

They went further from the house, into one of the rooms upstairs.

"Why did you bring me here?" Thalia asked him.

"I wanted you to enjoy your time. We could get pounced at any moment."

She slapped his arm. "Don't talk like that!"

He got the point, and started kissing her neck. She moaned for a second, before realising what he wanted. She couldn't say that she hadn't wanted to fuck Luke before, because most of her nights were spent dreaming about him. Luke thought Thalia was sexy, her long flowing hair, being buffeted by the wind coming through an open window, turned him on. In their hug, he grinded his cock against her cunt. She moaned again, trying to cover it as to not wake Annabeth. They were only 14 but there was no one around to stop them. He moved faster, rubbing her pussy with his dick. He couldn't hold on anymore, he pulled off his shirt, while Thalia took off hers. Because they didn't have time to pack or search before they moved on to a new place, they didn't have underwear. So after Thalia took off her shirt, Luke could see her impressive tits. She looked down at his growing, throbbing dick, not being able to wait for it. He pulled down his trousers, his 8 and a half inch cock standing straight out. Thalia couldn't believe it, 8 inches! Her legs buckled for a moment at the thought. They were both virgins, so they didn't really know what to do. Luke walked forwards and pulled down Thalia's jeans. He saw her wet teen cunt, and her cum dripping down her leg.

Luke seemed to know what to do, at least partially, and he guided Thalia towards his cock.

"Suck it." he said.

Thalia did what she was told, and place the dick inside her mouth. It tasted amazing! She bobbed her head up and down, getting a grip for what she was meant to do. She moved faster, and faster, until without warning, Luke shot his cum into her mouth. She swallowed it in shock, but realised that she wanted more. It tasted even better than the cock. Luke groaned as more shot out, it landing over Thalia's tits and face. Thalia needed more, she had vague ideas about what they were meant to do, so she put his cock into her cunt. He pushed forwards, feeling the barrier.

"This will hurt." he warned.

Thalia nodded, and grimaced as he slowly pushed forwards. He thrust, breaking the barrier, making Thalia scream out. She covered her mouth, as she realised Annabeth was asleep downstairs.

"Luke, I may have woken her!" she panted.

"Doesn't matter now, she'll ignore us." he replied.

He continued shoving his dick into her, letting Thalia get to grip with what she had to do. She started meeting his thrusts as she got more confident. It increased the pleasure for both of them, and it soon pushed Luke over the edge, he shot more cum into her cunt, and once Thalia felt it, she orgasmed, spraying Luke's body with her cum. Then the door opened.

"Guys?" Annabeth yawned. "What are you... That's sexy."

She walked forwards, towards where Thalia and Luke had finished for the time being. Thalia was on top of Luke, grinding his cock. They had heard Annabeth walk in, but didn't expect her to start kissing Luke. She stripped off her shirt, revealing perky tits. Luke started sucking on them, as Annabeth moaned. Luke pulled down her baggy shorts, showing him her cunt. He pulled her closer, so her pussy was over his face, and he started to eat her out. He licked her, shoving his tongue in further each time. She couldn't keep up with his pace, and his face was covered in her cum as she orgasmed. Thalia was still bouncing on top of Luke, and had orgasmed three times in the time she had been fucking him. His dick saw soaked, still dripping with her cum. She pulled Annabeth over to his cock.

"Suck his cock." she told her.

Annabeth's eyes widened, but realised what they had been up to before, and starting sucking his cock. Thalia started playing and sucking on his balls, as Luke sucked on Annabeth's tits.

"Annabeth, do you want to go?" Luke asked her.

"Go?" she sounded confused.

"Come over here."

Annabeth went over to Luke, and he pushed her onto his cock. It was only slightly in, but she shivered with pleasure.

"You will feel a burst of pain." Luke warned her like he had warned Thalia.

Annabeth's face was already scrunched up with pain. Luke tried a different tactic. He rammed Annabeth so quickly, that there wasn't time to feel pain. It went straight to pleasure, as he fucking her at high speeds. Her pussy felt like it was on fire, and soon enough Annabeth came over his cock. Luke ejaculated over Annabeth's tits. Thalia saw, and decided to help clean her up. She came over and started licking the cum off of Annabeth's tits. She wiggled her ass in the air, and Luke rammed it, Thalia screaming out, experiencing anal for the first time. She liked it after a while. Annabeth was tired, and fell asleep on the floor next to Luke. Thalia and Luke ignored her, and carried on fucking.

"FUCK YES! MAKE ME YOUR BITCH! MORE! FASTER!" she screamed.

Luke came inside her, and pulled out. He turned her ass towards him, and he slapped it. It wobbled like jelly.

"I'm going to punish you." he said in delight.

"Yes, punish me. I've been a bad girl." she moaned.

He continued slapping her ass, until it was bright red.

"Ooh that hurts." Thalia groaned.

"More for tomorrow." Luke said as he walked away.