Leo was walking up the stairs leading to the Argo II's deck with Piper when he saw Jason and Annabeth. Both were half naked, their chitons not fully covering them so they could fuck each other. Jason was standing facing away from them, holding Annabeth up by her butt as he thrust into her. She moaned as she scratched his back, her sounds interrupted with every thrust Jason made. Her eyes were closed so she didn't see them yet.

'So that's what I've been hearing downstairs.' Piper murmured to Leo, smiling. Her face already gave away that she was clearly turned on from seeing her boyfriend fuck another girl, and Leo could already see her breaths quicken as she watched the scene.

'We can't let them have all the fun.' He told her, giving her ass a gentle squeeze. He was getting hard already, and was wondering from takeoff when the first fuck would happen.

Piper quickly pulled her chiton up, her tanned ass shining in the sunlight.

'You want this ass so much, huh?' She giggled as she shook her butt for Leo. 'Well you can have it.' She grinned as she spread her cheeks to the side. Leo didn't hesitate to take his dick out, and with a few wet strokes, had it wet enough to fuck Piper. He carried her up in front of him, and felt her chilly back cool his chest. Her butt teased his cock as she rested it right above his dick, but before long, Leo had it inside her and was thrusting her up and down his cock.

Piper moaned as Leo filled up her ass. She quickly discovered over the summer that her ass was her favorite place to be penetrated, and preferred anal over other kinds of sex now. Not to say she didn't like to do other stuff now and again. She found herself entranced watching Annabeth's face, and the expressions she made as Jason fucked her. The way Annabeth, who was usually in control, quickly became Jason's bitch. Piper found it too much to handle, and without knowing it, started fingering her pussy as she watched the couple.

'You should try being quieter.' Leo warned, as he continued fucking her ass. 'They're gonna notice you.' Piper didn't even realize that she was making a sound, but it was already too late. Annabeth opened her eyes upon hearing her and was greeted with the sight of Piper intently masturbating to her while Leo pummeled her asshole.

Jason also noticed the sound. He turned around, and almost dropped Annabeth at the sight. Piper and Leo were still going, and showed no signs of wanting to stop, so Jason quietly put Annabeth down in a different position, on her knees this time, that way he could see Piper as he fucked her.

Annabeth, now being fucked by Jason doggy style, was shaking, and close to coming. Jason held her by the cheek, and as her eyes rolled up in pleasure, all she could see were Piper's C-cup tits in front of her, jiggling as Leo fucked her., visible after Piper's chiton slid from shaking so much.

Piper noticed Annabeth's clear lust, and motion to Leo to momentarily stop. She moved closer to Annabeth, and now also standing on her knees, before she completely pulled her chiton off, letting Annabeth see them in all their glory. Annabeth jumped to Piper like an animal, and as Jason kept pounding her pussy, she kept her mouth on Piper's boobs, while Leo put his dick back in Piper's ass.

The two girls came soon after, their juices leaking out of their cunts. But the boys were not done yet. As the girls settled on the Argo II's floor, kissing and playing with each other's tits contently, Leo switched to Piper's pussy, while Jason stayed on Annabeth's. They both came as well not too much later, before laying down with the girls as well.

'The first fuck of the trip.' Annabeth said, excited.

'Definitely not the last, though!' Piper exclaimed.

A/N

What do you guys think? Leave a review if there was something you like or don't like

If you a pairing you want to suggest, just review it! I'll see if I can fit it into a later chapter in the story.

Thank you for those who already gave pairings, I'll be sure to include them when I get the chance to fit it in the story

The next story is going to be in Camp Jupiter. Reyna with either Piper or Annabeth