Background:
*Peter and Tris are out on a search mission for Dauntless and they're going through the abandoned section of the city, when they enter a house. It's pretty fancy and neither of them had seen such extravagant items before. They go in the bathroom and see a bathtub.*
"I bet you don't even know what this is, Stiff."
"So?"
"It's called a tub. People screw in it."
Tris's face immediately blushed red. "That's it. I'm leaving," Tris said, flustered.
But Peter wasn't done having fun yet. "Wait, don't you want to see how it works?"
"How do you even know about this thing?" Tris asked.
"In Candor we watched porn."
"God, Peter, how much more vile can you be?"
"Hey," he retorted, "it actually is a good learning tool to see how people use artificial emotions and to learn the different signs that identify fake feelings from real ones."
"Oh," was all Tris could mutter, hating when Peter sounded like an actual, intelligent human for a change, because it was harder to despise him that way.
"Plus hey," Peter added, "it's not bad on the eyes for a teenage boy," he smirked.
Aaannnd douchebag Peter is back.
As Tris turned to leave she heard running water.
Her curiosity got the best of her and she looked back at Peter.
"Hey it still works," he said, sitting on the edge of the tub waving his hand under the rushing water.
"Well," Peter shrugged, "can't leave this investigation incomplete," he said as he started taking off his shirt.
"Peter?! What the hell are you doing?" Tris asked, stunned.
"Hey, I'm just doing a thorough Dauntless investigation," Peter countered.
Tris let out an exasperated sigh. "You know I can't return to the compound without my partner," she groaned, annoyed.
"Then come on in, the waters fine," he winked.
Tris rolled her eyes and approached the water just to prove Peter wrong, so they could get the hell out of there. She ran her fingers under the faucet and shivered against her will with delight. Warm water. They never had this luxury in Abnegation. Peter was down to his boxers now and Tris was staring. She snapped out of it and looked back to the size of this "tub" and quickly calculated how this was going to work. She figured if she pulled her feet to her chest and he did the same they wouldn't actually touch.
"Peter, turn around."
He rolled his eyes and chuckled but complied.
She figured she could pull her tank top long enough to be like a dress.
"Here's the plan. We get ten minutes. No more. No one will ever know about this. You will stay on your side of the tub. Got it?"
"Whatever you say, Stiff," Peter said as he eased himself into the warm water and let out a moan of pleasure. Tris hated the reaction her body had to his groan. He glanced up at her and laughed.
"Come on, you're really gonna wear all of that? How are you gonna explain a soaking wet shirt?"
Unfortunately he was right.
"Turn around then and get on your side."
She quickly slipped off the tank leaving her in her sports bra and undies and hopped in.
"Oh God, this does feel good." She sank down and let the warmth envelope her. They sat in silence for a few minutes, the only sound their relaxed breathing.
"This is nice," sighed Peter.
Tris rolled her eyes at the fact that he ruins literally everything, even silence. But then she reminded herself that without him she wouldn't have found this amazing contraption.
"Ah shit, leg cramp!" Peter shot towards her as he straightened his legs so that he was basically sitting in Tris's lap.
He looked over at her shocked face with a grin. "Oh hey, Stiff," Peter said coolly.
"Peter, get off!" Tris said, shoving against his broad shoulder.
"You know, actually, I like this quite better," Peter smiled widely at Tris as he stretched his arms over the back of the tub.
"Ugh," Tris huffed as she scooted out from under him to the other end of the space. She glared at him as he grinned at her.
"You know, there are other activities you can do in here..."
"No thank you, Peter," Tris protested loudly.
"No, no besides that."
Peter looked behind him and picked something up off the ground. It was a pink liquid in a fancy crystal bottle. "Huh, it's soap."
"Soap?" Tris repeated. "Not like any I've ever seen," as she was only familiar with the plain white Abnegation bars.
Peter poured some of the liquid in his hands and rubbed them together forming a lather. A fresh floral scent floated through the air and Tris closed her eyes and breathed deeply. Suddenly something grabbed her foot.
"Hey!" she snapped her eyes open to find Peter with her foot propped over his knee gently rubbing the soap over her foot. She was about to object when he hit a tender spot and her protest died in her throat and a small gasp escaped instead.
"Peter, you know I hate your guts."
"I know," he said without looking up, as he continued with his task at hand.
"But that feels so damn good," Tris closed her eyes and sank deeper into the tub allowing herself to relax.
He continued up her leg to her calf muscles which had never been this sore in her life before Dauntless, and his large but nimble fingers loosened the knots in her muscles. Next were her quads and Tris was so wrapped up in her blissed out state she hadn't realized how close he was to her now, and how intimate this had become. He ran his hands back and forth underwater over her tense thighs. Without thinking she sighed his name. That undid him. Peter acted on all the sexual tension that had been building in him since day one of initiation and slammed his lips into hers.