Title: Shifting the Boundaries

Author: Wincesteriffic Kaz

Info: A shapeshifter with a taste for Sam starts a curse that changes everything. Dean/Sam

Author's Note: Second chapter…also pretty much a prompt request for my other Pimp Momma who wanted some kink and come on….when has a tied up Sammy ever been a bad thing?

Graphic depictions within.

Disclaimer: I don't own 'em but if I did…they'd never get dressed. Heh heh heh

~Reviews are Love~

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Chapter 2

Dean slid to a stop in the old pumphouse and groaned as their prey, a zombie, dropped through the floor ahead of him and vanished. "Son of a bitch!"

"Where'd he go?" Sam ran up beside him with his machete and frowned.

"Down the damn rabbit hole." Dean rolled his eyes and started forward. He looked down and shook his head. "He couldn't just use the stairs? Come on. Freakin' zombies." Dean sat and swung his legs in then jumped, landing the seven or so feet with an easy thump. "Lights are on at least." He looked around the basement and saw no sign of the zombie except for a tunnel leading out. "He's got a lead on us, move it already!"

"Keep your pants on." Sam rolled his eyes. He sat and put his legs in the hole, grabbed onto the other edge and dropped. "Shit!" He yelled as the back of his shirt caught on something behind him. His feet hit the floor as his shirts were pulled up under his arms and to make it worse, his watch strap snagged on something and trapped his left arm over his head. "Fuck!"

Dean stood with his jaw open, having watched it happen and snorted, then bent double laughing. "Holy shit, Sam." He watched his brother trapped by his shirts and his watch and snarling curses as he tried to free himself.

"Anytime you wanna stop laughing and HELP, asshole!" Sam shouted angrily. He could only just get his head down around his shirts far enough to see Dean, and the grin on his big brother's face was not helping. "Come on, dammit!"

"O…ok. Ok." Dean wiped a hand over his face and got the laughter under control. "Damn. Wow." He looked at his brother and then swallowed hard as his mouth went dry. Sam's chest was bared from his hips to his neck. He had both arms stretched up above him, using his right to try and free his shirts or his arm and the muscles in his chest were rippling with effort.

"Dean?" Sam called and jumped when he felt hands on him. "What the hell, dude? This is not time for a quickie!"

Dean snorted and smoothed his hands over his brother's chest, enjoying the flex of muscle and skin. He was suddenly reminded of how he'd found Sam with the shapeshifter all those months back – wrists bound, and arms stretched taut over his head, tied to a beam in the ceiling. He'd been too busy saving Sam's life at the time to notice just how hot a picture it made. But now... "Chill out." He chuckled and bent, capturing one of Sam's nipples with his mouth.

Sam gasped in a breath with the feel of Dean's tongue and then his teeth. Lust exploded through him and left him panting. "Fuck, Dean." He groaned as Dean's hands slipped around his back and down into the waist of his jeans to cup his ass. He pulled at his hands above him and even as it worried him to be caught up that way, it also sent a delicious little thrill through him…completely at Dean's mercy.

Dean reluctantly pulled his hands out of his brother's jeans and leaned back, breathing heavily. "Make a mental note. We are SO comin' back to this."

"Shit, yes." Sam panted, completely onboard with that idea.

Dean pressed up against Sam's chest and reached up along his arms. He tugged and freed Sam's shirt while his other arm wrapped around his waist and pulled him close. "Still got a zombie to gank."

"Uh huh." Sam dropped his head and took Dean's mouth in a heated kiss while he worked to undo the clasp on his watch above him, all the while wishing the zombie was already dead and they could finish what Dean had started because his blood was heated through now with want. His watch popped free and his arms fell. He wrapped both around Dean in a crushing grip.

Dean groaned into the kiss and pulled away finally with a breathless laugh. "Zombie. Dead. Then you and me are gonna have some kinky time."

Sam laughed. "Kinky time?" He picked his machete up off the floor and followed alongside as Dean strode to the tunnel entrance.

Dean shrugged. "Well, considering I plan on tying your ass up to the first thing I can find…" He sent a heated look over his shoulder. "…yeah. Kinky time sounds about right."

"Damn." Sam had to reach down and adjust himself in jeans suddenly too damn tight.

Dean chuckled and then held up a hand. He glanced back at his brother and nodded ahead.

Sam gave him an answering nod. He'd heard the slight scrape of foot on stone too.

Dean went ahead and swung wide to the other side of the tunnel, trusting Sam at his back and deliberately scuffed a boot on the floor as he neared a T-branch. As he'd expected, the zombie erupted from the left side with its arms reaching hungrily for him. It never made it. Sam's machete came down behind it and swept cleanly through its neck. The zombie's head fell and rolled away while Dean grinned.

"Nice, Sammy." Dean slipped his machete back into the sheath at his hip and slapped his brother's shoulder. "Let's burn this bitch and get to the fun stuff."

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Sam stood under the hole and reached up to jump and pull himself back up. He grunted in surprise when Dean's arms wrapped around his waist from behind. "Dean? Dude, seriously. Here?"

Dean chuckled. "You know where anywhere else tall enough for you, gigantor?" He slid his hands down to Sam's waist and unbuckled his belt, sliding it out of the loops and felt his brother's breath quicken. He glanced up and saw the outcropping of pipe that had caught his shirts on the way down. "Shirts off. Now."

Sam shivered and turned to face Dean as he quickly pulled his shirts off over his head. It was chilly in the basement and goosebumps prickled across his bare chest and arms as he dropped them to the side and held his hands out in complete trust. He smiled at the lustful look on Dean's face while he wrapped the belt loosely around his wrists.

Dean took Sam's arms and pushed them up, hooking the middle point of the belt around the pipe overhead. The belt was just secure enough to hold him but loose enough that Sam could wiggle his hands out of it in an emergency. They were Hunters. Actually tying Sam up helplessly wasn't something he thought he'd ever be able to do, much less ever WANT to do. It was too big a risk given the bad things that tended to come after them on a regular basis. But in spite of all of that…the vision of Sam stretched out and vulnerable to his every whim like that was doing delicious things to both his mind and body. That Sam was so willing to offer him the kind of trust that had him willingly holding out his wrists and leaving himself so completely in Dean's control was even more of a turn-on. He slid his hands slowly down his brother's arms, tickling his fingertips over the underside of his arms and watched Sam twitch with the sensation.

"Shit, Dean…" Sam gave a breathless laugh. "…tickles." He gasped softly when Dean leaned in and bit into the tender skin of the back of his arm, a light graze of teeth and tongue that sent shivers through him and straight to his cock, making it twitch in his jeans. "Shit."

Dean dragged his nails down Sam's sides and moved his mouth over his collarbone, up his neck and finally dove into his brother's mouth while he dug his fingers into Sam's hips. Dean could feel him trembling and straining, pulling on his arms over his head while he panted into his mouth. He leaned back and then stepped away to run his eyes hungrily over the sight of his little brother, strung out on pleasure, tied in place and cock straining against the zipper of his jeans. "Damn," Dean growled it and pulled his phone out of his pocket. He flipped it open when Sam's eyes widened and quickly snapped a picture.

"Dude, you EVER show that to anyone and I'm gonna make myself an only child." Sam threatened it even as he chuckled. His laughter died away as Dean shrugged out of his jacket and pulled his shirts off. His eyes couldn't help but follow the narrow trail of fine hair down his stomach and into his jeans and he licked his lips, wishing he could get his mouth there.

Dean watched Sam's eyes drop and flicked the top button of his jeans open. "You're thinkin' you wanna be on your knees right now." He said it huskily and went back to his brother and bent, taking a nipple between his teeth. He flicked it with his tongue until it tightened and Sam moaned. "You wanna get my cock in your mouth." He moved on to the other nipple while he undid Sam's jeans and brushed the palm of his hand over his painfully hard cock. "Don't you?"

"Fuck, yes." Sam groaned and let his head fall back between his arms as Dean slipped his hands into Sam's jeans and smoothed them over his hips, taking his jeans and boxers with him down to his ankles as Dean went slowly to his knees and looked up.

Dean's mouth filled with the sight as he looked up Sam's long body. Every muscle was taught, the proud jut of his cock as it curved up toward his belly and the fine sheen of sweat beginning to glisten on his skin in the light made him moan with want. "Not today, Sammy." He leaned forward and except for a puff of warm air, went past his brother's dick and mouthed along the curve of his hip instead while his hands slid to curve around his thighs, thumbs just brushing the underside of his balls.

"Fuck, Dean. Please!" Sam couldn't believe he was already reduced to begging. He knew, if not for the belt, he'd already have a hand on himself, and he shook with need but didn't free his hands. His hips jerked forward while Dean's hot, wet mouth took a meandering path down his thigh and then bit behind his knee, making him cry out with startled pleasure.

Dean chuckled and licked the spot he'd bitten before closing his lips and sucking hard at the tender spot. He wanted to leave his mark, and if the way Sam was vibrating under his hands with little needy, desperate pleas was any indication, he didn't mind. His dick was straining along with him and Dean pressed a hand against it to relieve some of the pressure because he was nowhere near done yet. He moved and smiled at his handiwork, the bright red hickey behind Sam's left knee. Dean rubbed a thumb over it and moved to his other leg to give the back of his right knee the same treatment.

Sam wasn't sure he even had the capacity for speech left. His world had narrowed to his brothers' lips and teeth and he hadn't even touched his cock yet. He gasped again and stared down while Dean sucked at the back of his knee and dragged his fingernails maddeningly over the inside of his ankle. His hips pumped desperately into the air, seeking friction. "Dean…god, Dean. Please." He was at a point where he'd give his brother any damn thing he wanted if he just gave him a little relief.

Dean sensed that Sam was close to the edge and growled possessively as he moved back to kneel in front of him again. "I got you, Sammy." He slid his hands back up his legs and a wet path up the front of his cock, earning the long, guttural moan from Sam that made him damn near come in his pants. He huffed out a laugh into the nest of dark curls at the base of his brother's cock. "Jesus, Sam. I swear one of these days you're gonna make me come just listenin' to you."

"Dean…please." Sam looked down at him and had to suck in a breath, seeing Dean's face so close to his neglected cock.

"What do you want, Sammy?" Dean flicked his tongue out to the already glistening head of his cock and moaned as the taste burst on his tongue. "Tell me."

"You," Sam thrust his hips forward, chasing the feel of his brother's tongue but Dean pulled his head back and watched him with lust-darkened eyes.

"Gotta be more specific. What do you want?" Dean enjoyed making his normally uptight little brother talk dirty. Sam blushed so damn pretty, Dean couldn't help himself. He ran a hand up the inside of Sam's thighs and brushed one, long finger between his cheeks. "Tell me what you need, Sammy."

"God! You!" Sam's head fell back as Dean's teeth closed on the skin over his testicles and a finger played temptingly between his cheeks. "You, suck…suck me. Please! God, Dean…I can't take it." He looked back down frantically. "Suck my cock, Dean. Please?"

Dean groaned and smiled. "That's my boy." He wrapped a hand around the base of Sam's cock, making him moan loudly and then he swallowed Sam down as deep as could until the head bumped the back of his throat. Sam shouted and would have gagged him as his hips jerked forward if not for his hand.

"FUCK!" Sam cried it out as Dean swallowed around his length. He was left gasping as Dean let him slip back out and then thrust his tongue into the slit. "Ah, g…GOD!" So much sensation…so much pleasure after being teased so thoroughly made his head spin and he was sure the only thing keeping him from stumbling to his knees was the belt holding him upright. "Don't! Don't stop!" Sam looked down and begged as his brother's mouth popped off of him.

Dean chuckled and pulled a little bottle of lube from his back pocket. "Don't you dare come yet, Sammy." He squeezed some out onto his fingers and slipped his hand back up between his legs while he tugged Sam's jeans off one foot with the other.

"Ah holy hell." Sam's head fell back as Dean's slick fingers slid up between his cheeks and his other hand pushed his legs further apart. It dropped him lower and pulled his arms even tighter above him. "Fuck, yes."

Dean had a fleeting wish for a video camera. He couldn't get enough of watching Sam's muscular arms and chest strain at being held. He took Sam's cock back in his mouth and kept his eyes up to watch how he trembled and gasped as he slid a finger inside him. He moaned around Sam's length when he felt the muscles inside him clench around his finger. He needed to be inside him soon. He didn't wait and pushed a second finger into Sam, earning a strangled shout of pleasure.

Sam couldn't stop himself fucking forward into Dean's mouth and back onto the fingers opening him up roughly. The look of desperate 'want' on his brother's face below him had him biting his lip. "Dean…Dean. Please…fuck…fuck me, god. Please!"

Sam's breathless, haggard voice begging was the sweetest sound Dean had ever heard. He let Sam's cock slip out of his mouth and pulled his fingers out then stood and grabbed Sam's face for a hot, desperate kiss. It was clashing teeth and tongues tangling as they both moaned and gasped. Dean shoved his jeans down his hips and pulled Sam into him; thrusting their cocks together to slide and press between them in a maddening rhythm that was nowhere near enough for either of them.

Dean broke the kiss and slid behind Sam while he heaved air in and out. He pressed against the long, taut line of Sam's back, reveling in the feel of his skin and muscles as his little brother pulled on the belt binding his wrists. Dean splayed his hands over Sam's ribs as he slid his cock along the cleft of Sam's ass, teasing him with the feel of it so close; catching on the rim of that tight ring of muscle while Dean drew his hands down to spread his cheeks apart. "Shit, Sammy. So fuckin' hot."

Sam pushed back into his brother's cock and let his head drop back onto Dean's shoulder with a moan. He tugged on his arms and gasped when Dean's fingers dug into his hips, holding him still. "Please…please tell me you're d-done…teasing me." He chuckled at Dean's growl in his ear.

Dean took the lobe of Sam's ear in his teeth and licked along the edge of it, grinning at the trembling moan he earned. He pulled Sam back against him harder, spreading the cheeks of his ass and thrust forward, forcing his cock inside him and up in one smooth motion that made them both shout.

For a moment, Sam couldn't decide whether to push back for more or pull away to give his body a moment to adjust. Dean hadn't opened him up quite enough and it burned with pain along with the pleasure. He gave in to it - to the belt tying him, the hands holding him in place, to Dean, and pushed back with a pleasure-soaked moan. "More!"

"Fuck." Dean didn't think either one of them was going to last long now. Sam's muscles held him like a vice while Sam worked his hips back onto him. "Holy…shit." He gasped. He moved Sam's feet further apart, watching the muscles in his shoulders bunch with the sharper angle. Dean pulled back and shoved back into Sam, slapping in against his back with the force of the thrust. It was tight and he knew there had to be at least a little pain but the way Sam was shaking and pushing back to meet each thrust of his hips told him his little brother wasn't complaining. Dean felt it building quickly, his orgasm not far away as the sounds his brother was making and the feeling of his muscles clenching and releasing around his cock all worked to blow away his control.

"Gonna…gonna come for me, Sammy?" Dean's gravelly, strained voice asked into his brother's ear.

Sam nodded, beyond speech; his senses overloaded. Dean's teeth took hold of the pulse in his neck while one of his hands slid down to his engorged cock and wrapped around it. He cried out as Dean pumped his fist roughly in time with each solid slap of his hips into Sam's backside. Sam wanted to wait. He wanted to hold on to the moment because it felt like too much and he fought for just a moment against the orgasm and then it washed over him in a wave, stealing his breath on a scream until he knew nothing but the pleasure crashing through him.

Dean shuddered as Sam's cock twitched in his hand and he came. His little brother screamed in his ear with his head thrown back and Dean's own orgasm slammed into him. He shouted his release through his teeth into Sam's neck, thrusting wildly until finally it began to ease and he gasped for air, groaning as he put his head into Sam's neck. "Son of a bitch," Dean muttered with a weary chuckle and then raised his head when he realized he was supporting his brother's weight completely. "Sammy?"

Dean slipped out of him with a soft hiss of discomfort and gave Sam a shake. He started to chuckle. "Hot damn. I'm good." He tugged his jeans back up over his ass then reached up above them and easily slid the belt off the pipe to let Sam's arms fall in front of him. Dean took his weight with a grunt and lowered them both to the floor. He leaned Sam against his chest and started rubbing the circulation back into his shoulders and arms while he got his breath back.

Sam groaned softly as consciousness came back to him and he felt hands rubbing up and down his arms. He opened his eyes and found Dean's grinning face looking down at him. "Oh, hell." He rolled his eyes.

"Yep." Dean nodded happily.

"Dammit." Sam tried to sit up and was yanked back against Dean. He grimaced as his bare ass slid on the floor.

"Yes, I did." Dean held on to him and chuckled. "Say it, little brother."

Sam gave up and flopped back into Dean's chest with a laugh for his ridiculous brother. He felt too damn good to put up a real fight. "Fine. Yes. You fucked me unconscious. Happy?"

"Oh HELL yes." Dean snorted but kept his arms around him while Sam rested against him and just sort of sprawled bonelessly in his lap. "You good?" Sam nodded and let his head fall back, making Dean chuckled. He rubbed his shoulders again and got a happy moan for a response. "Definitely gotta tie your ass up again."

Sam wanted to argue with that, he really did, but, dammit, that had been the most mind-blowing orgasm he'd ever had; hard to argue with fact. He smiled and enjoyed Dean's fingers kneading into the muscles of his shoulders. They were sore but it was a good, well-earned kind of sore, like the rest of him. "Hope you know you're carrying me back to the car."

Dean chuckled and slapped a hand on his brother's bare chest. "Not gonna happen, princess. Come on. My ass is goin' numb."

Sam laughed and sat forward and grimaced as his backside reminded him it had been well used. "You should talk."

Dean stood and nudged Sam's jeans over to him. "Didn't hear you complaining." He smirked. "Did hear you screaming though."

"Did not." Sam gave him a glare as he pulled his jeans on, stumbled to his feet and pulled them on. "I do not scream."

Dean smiled. "Uh huh." He laughed and steadied Sam when he bent for his shirts then gave him a shove toward where he figured the stairs had to be. He picked up his own shirt and pulled it on, grabbed his jacket and followed him, giving him a nudge when he wobbled and couldn't stop the occasional chuckle.

"You can stop laughing at your own awesomeness any time now." Sam rolled his eyes and smirked, amused.

"I'm thinkin' about it." Dean grinned and rubbed his knuckles on his chest. "Admit it. I'm awesome."

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The End.