This is a belated Christmas gift for my lovely, darling, wonderful MJLove1, who wanted slightly underage Weecest. I also want to thank Twinchester Angel, who is awesome and wonderful in every way, for all her time and terrific advice with this story. This is my first time writing the boys so young, so I hope it works. Anyway, I hope you all like this and reviews are love!

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As Dean felt a moan push past Sam's soft, wet, kiss-swollen lips and into his mouth, he leaned back against the headboard of the bed, gripped Sam tighter and thought about how for once he was so not sorry that their dad had left him behind on a hunt. Sam inhaled sharply and shifted closer so that he was straddling Dean's left thigh. They were both in only t-shirts and boxers, so as Sam's erection poked him, he felt the slicked-up cotton of Sam's boxers leave a wet-spot on his naked thigh. He reached down and rubbed his thumb against the tip through the boxers, feeling how the soaked cotton clung to the head. In response Sam fisted his t-shirt and pushed him back harder against the headboard and Dean scooted down on the bed so he could lie down and then grabbed Sam's t-shirt so he could pull him on top of him. Sam got onto his knees, straddling Dean's lap and with his hands resting on either side of Dean's head. Sam's cock was hanging down and just barely brushing the naked skin of Dean's erection that was peeking out from his too-tight boxers and Dean raised his hips to find some friction for them. They'd been making out for over half an hour now, and Sam was moaning at just being barely touched; they were both ready to come.

Instead of rutting against him like Dean expected Sam looked down at their pelvises and then reached down with one hand and pushed Dean's hip down into the mattress, stilling him. Then he brought Dean's hard cock out from his boxer shorts before grabbing his own and starting to rub the head up and down Dean's length, smearing it with pre-cum. Dean watched his cock being slathered by Sam's swollen, red head and the string of clear fluid still connecting their flesh when he pulled back a little and let out a low, primal growl.

"Fuck, c'mere, Sam."

He pushed down on Sam's ass and Sam finally lowered himself onto Dean and began rocking against him, rubbing their cocks together. Dean raised his upper half up a little to meet Sam's lips in another kiss, but Sam avoided his mouth and instead began kissing his ear and then slowly moved down to his jaw and then his neck, working his tongue in a circle around the skin as he covered it with passionate kisses. The heat between their bodies was beginning to make the room hot and Dean felt his skin begin to flush as he and panted and moaned under Sam's attention.

"Are you getting close yet?" Sam asked in between wet, sloppy kisses.

"Not yet Sammy, why? You wanna make this quick, gotta study or something?"

Sam was lightly sucking the skin on Dean's neck when he said that and he could actually feel Sam smile against his skin. "Not tonight."

"Then what?"

Sam stopped rutting his body against Dean's, then slipped his hands underneath Dean's t-shirt, pulling it up over his chest and scooted down on the bed so he could slide his mouth over Dean's right pec. "I wanna make you feel good."

As soon as the words were out of Sam's mouth, Dean knew what he was planning to do and he threw his head back on the pillow as his penis spent a moment warring with his conscience. "You always make me feel good, Sammy, you don't hafta –"

"I know." Sam managed to successfully pull Dean's shirt up high enough so that the fabric was all resting just below his neck and then he came back up for a quick kiss. "I want to." He looked into his eyes and smiled wide, showing his dimples. "I like it."

Dean moaned and closed his eyes as he willed himself to enjoy this and not fight Sam on what he wanted to do. They'd only started going so far as to give each other blow jobs since earlier that week. He'd done it for the first time as soon as their dad left the house to head to a crocotta hunt one state over. Sam was especially worked up at the time because he'd just gotten into another fight with their dad right before he left. This time it was about the school year; it was almost May and school was going to let out in just another month, so Sam wanted to stay in the piece of crap house they'd rented until school was over so he could make friends and pretend he was normal or some shit like that. Of course, Dean had to question Sam's definition of 'normal' because the second their dad's truck was out of view of their rented house Sam had attacked him, so worked up that he was practically mauling him. Sam was more aggressive than usual because he was a combination of angry and horny and Dean felt a little sorry for the kid and wanted to do something special for him. He knew that Sam had never had a blow-job but would definitely like it and, truth be told, Dean had never given head and was a little curious about what it would be like to do it to Sam.

Sam had gasped, moaned, and thrashed against the bed as Dean had worked him with his mouth and then within thirty seconds was pushing Dean's head away, trying to get him to stop as his stomach muscles fiercely twitched and his body tensed for orgasm but Dean had kept going until Sam came apart, his whole body going at first rigid and then completely limp underneath him as he filled his mouth with wave after wave of his bitter, musky, salty come. He hadn't swallowed; he'd planned to, like he'd seen girls do in pornos and like a few chicks had done with him, but there was just a lot of it, it didn't taste that great, and he was afraid that if he swallowed it all it might make him sick. He'd gone to the bathroom and spit it out in the sink, thinking that maybe he could work himself up to it the next time, and then wiped his mouth and came back to their bed. As Sam had lain there, completely sated and weak, Dean had felt proud of himself at how good he could make Sam feel. But then Sam had wanted to do it back. He'd tried telling Sam that he didn't need to return the favor, that the only reason he'd done it was to make him feel good, but Sam had insisted, and now it was already turning into a regular thing. It wasn't that it was bad; Sam was inexperienced but a fast learner and a selfless lover, but there was something about seeing Sam with his cock in his mouth that simultaneously made Dean feel hot and guilty at the same time. Teaching Sam how to talk to girls, change the oil in the car, and properly maintain their weapons was all part of his responsibilities as a big brother but, somehow, showing him how to successfully suck cock, especially his, didn't feel like part of the job description.

But now, Dean's breath hitched and quickened as Sam laved his tongue all over Dean's chest and stomach, laying sloppy kisses all the way down his body, and then grabbed the waistband of Dean's boxers and tugged. Dean arched his back a little to let Sam push them down his thighs and then felt wet heat and light suction on his cock as Sam immediately took the head and about an inch of the shaft into his mouth. As Sam slowly bobbed his head, Dean kept his eyes closed, letting himself just feel the pleasure that was slowly building from his cock and spreading to the rest of his body, making him feel tense and hot all over. Sam's mouth slipped a couple of times as he pulled back, breaking the suction with filthy slurping noises, but he was getting better and better at this every time he tried it and Dean was sure that, this time, if he kept going for long enough he could make him come. Sam pulled off of Dean completely when Dean's chest began to heave.

"Jesus Sammy, you're getting too good at that."

Sam crawled back up Dean's body, kissed him hard on the mouth, and then pushed his tongue inside so Dean could taste the small bit of musky, heady flavor of himself still left on Sam's tongue. Dean grabbed Sam's hair and pulled his head back. He saw the hunger in Sam's eyes and his red, swollen lips upturned into a smile and felt a swell of happiness. He loved seeing Sam look at him like this, so unlike the hungry stares of his past hook-ups who had needed him in the moment when they wanted to get off but the next night would be supplanting his face and body with someone else's. Sam only wanted Dean to satisfy him tonight, and the next night, and the night after that.

"God, look at you, so fucking hot." He pushed down on Sam's ass and raised his hips simultaneously to encourage him to lower himself so that their cocks could touch. "You ready, Sam? You wanna come?" Sam kissed him again, but wrested out of Dean's grasp. Dean sat up on the bed, pulled his boxers back up, and looked at Sam in shock as he slid to the foot of the bed, away from him. Had he done something wrong? "What is it?"

"I…" Sam reached underneath the mattress and pulled out a little brown paper bag. "Well, I went to the store yesterday."

He reached into the bag and pulled out something with a pop-off red top, then grabbed Dean's hand and placed the cool plastic object in his palm and Dean looked down to see that it was a bottle of lube. At first, all he could do was stare at the bottle in amazement. Sam had gone out and gotten this? He couldn't imagine his little brother, who blushed whenever the word 'sex' entered a conversation, walking around a store looking for this stuff. Then Sam reached back into the bag and pulled out a box of condoms and it was only then that all the implications of what was happening really hit him.

Sam set the condoms down beside Dean's left knee. "We – well, I thought now would be a good time for this."

Dean dropped the lube onto the bed beside the box of condoms – Magnums, economy size, Sam must have expected they would have a busy weekend ahead of them – and stared at both disbelievingly. "You want to…"

"Yeah."

Sam had planned, actually planned for them to have sex – he'd gone out and bought – and he could only imagine how red Sam's face must have been when he'd handed the stuff over to the cashier – and now he expected Dean to… He stared at the condoms and imagined sliding one on his cock as Sam lay all opened up and spread out before him and several things happened to him at once; his heartbeat sped up, a surge of guilt made his stomach do a sickening twist, and he dribbled a little pre-cum in his shorts.

Sam followed his eyes to the condoms. "The condoms – I wasn't sure if we were going to actually need them. It's not – I mean, I trust you; I know you haven't been with anyone in a really long time. I just didn't know, you know, if the lube would be enough, that maybe the condoms would make it, well, easier. But we don't have to use them; I know it's supposed to feel better without them."

Dean's stomach tightened and his mouth went dry. Sam was thinking about how he would feel to him, his tight, newly breached muscles squeezing his cock as he moved… Oh god, just the very thought of it, he hadn't had sex in almost six months…He'd wear the condoms – it would still feel awesome and the added lubrication would make things easier for Sam… Before he knew it, he'd allowed himself to picture a whole litany of positions, places, angles – bending Sam over the desk near the front door; sitting on the couch in the living room and holding Sam's hips in place as he rode him; laying Sam down on the bed, on his back and lifting his hips, spreading his cheeks and then lining himself up – before he managed to stop himself. No, Sam was still so young; he wasn't even of voting age yet! He knew Sam wanted this – he never would have touched Sam at all if he even suspected otherwise – but this was a big deal. Sam had never…

Sam slipped his t-shirt off over his head and then crawled into Dean's space, placed a hand on Dean's chest, and gave him a soft, brief kiss. He grabbed the bottom hem of Dean's t-shirt and began pulling it up, but Dean grabbed his hands. "I don't think we should, not yet."

"Then when, Dean? Dad's only going to be gone for another week until my birthday and he's always bringing you along on hunts now; he never leaves us alone anymore. This last time, we didn't even get to touch each other for three weeks!"

"I know! God, believe me, I know. But…it's complicated, Sam."

"No, it's not. We're here. We've got condoms and lube. Dad's not gonna be home for at least a few days. We can do this right now."

"We don't have to have full-on intercourse just because it might not fit into the schedule again for a few weeks! This is a huge step, man. I mean, you're still a virgin –"

"Yeah, Dean, I know. Look, I know it's a big step, but it's one I'm ready to take - we're ready to take. I thought you'd want to."

"I do. Fuck, you have no idea how much I... But Sam, wanting it and being ready for it are two different things."

"I'm not some little kid anymore, Dean; I'm almost seventeen, so don't try to spoon-feed me some crap about being too young for this. You were having sex at fourteen."

"Yeah, and I was way too young for it then too! I shouldn't have lost it then. Fuck, I don't even remember what her name was!"

"Carly Becker."

"You remember that?" Dean was impressed; he wasn't sure he ever knew her last name.

"Yeah, I remember that; I was jealous as hell when I found out. But, that's my point, Dean. I waited and I'm old enough to know that I'm ready and who I want to do this with. I –" his speech faltered for a moment and then he gave him that damn puppy-dog look that always broke Dean's heart whenever he was on the receiving end of it and couldn't give Sammy whatever he wanted. "I want you to be my first, Dean. I always have."

He stared pleadingly into Dean's eyes as he sat up on his knees and pulled down his boxer shorts, lifting one knee at a time so he could pull them down and off his legs. Dean's eyes grew wide and his jaw dropped as he looked down Sam's gorgeous body; the finely-toned muscles that were just beginning to form on his chest, arms, and stomach covered in smooth skin with just a few scars, the v-cut of his hips dipping down to the fine curls of his pubic hair, his muscular thighs and his now semi-hard but still impressive erection standing at attention between them. Sam had grown up into a beautiful man. Dean could feel blood rushing back to his cock and making it grow once again to full hardness. If he did this, it was going to hurt Sammy the first time, and the second too if they had one, but he could be gentle, soft, slow. If he did it right, it would feel really good for the both of them.

He looked back up into Sam's face; the full lips, the little mole beside his nose, his wide, trusting eyes. Sam was giving him the exact same look he did when he was six and Dean told him he was going to let go of the bike handlebars and let him ride on his own, or when he was nine and thought there was a monster in the closet and Dean had told him to climb into bed with him for protection. He swallowed hard. Sam looked up to him and trusted him to do the right thing. He looked up to him because he was the only one who was always there for him, and he trusted him because, other than their dad, he didn't even know anyone else to trust. And now Sam, who griped all the time about hunting, who wanted so badly to be "normal," who knew nothing outside of him, who had seen more death, destruction, and pain in the past few years than most people did their whole lives, trusted him to take away the last shred of innocence he had left. Oh god, what was he thinking? He was going to gently fuck his little brother?

"Sammy…"

"Take me, Dean. Please."

Most people used those words merely as an expression, just another way to say that they wanted to have sex. Sam wasn't; seeing all the love, fear, and vulnerability in Sam's eyes, Dean knew all the implications of what his little brother was saying. He wanted Dean to be his first so he could literally take him and claim him as his. Sex was the last step for them and afterwards, they'd be completely wrapped up in each other. It was everything Dean wanted and nothing that he was ever supposed to have. The room suddenly became small and insufferably hot. There was too much emotion in the air. Dean's throat closed up, his head spun, and his stomach clenched in fear as he stared at Sam. This was – he shouldn't have this, he'd already taken so much from Sam – He'd been a selfish dick for long enough.

"Sam – I – I –" He ducked his head. "I have to go."

He quickly jumped off the bed and began looking for his pants. Sam stared at him, horrified. He grabbed a corner of the blanket and pulled it up over the front of himself. "What? But – but – I don't understand. I thought you wanted this?"

Dean looked at Sam, so openly hurt, the comforter pulled up over him in shame as if he was some kind of hideous monster, and his heart literally hurt at the sight. He felt a pull to go to Sam, to comfort him and hold him, but then the weight of the situation they were in came down upon him, threatening to smother him to death. He pulled up his pants and then grabbed his socks beside them and jammed his feet into them.

"Look, I'll be back later, I just gotta get out of here for now." He slipped back on his t-shirt, threw on his leather jacket, grabbed his boots, and headed for the door to their bedroom.

"Wait! Where are you going?"

Sam's voice cracked on the last word. Dean knew he couldn't turn around, that if he looked at Sam it would all be over and he wouldn't be able to leave. He stood in the doorway and looked down at the ground. "Sam, don't – I'm coming back. I just can't deal with this right now." With that, he quickly left the bedroom, got out of the house, and still holding his boots in his hand, climbed into the Impala, jammed his sock-clad foot onto the accelerator, and peeled out of the parking lot.

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Thanks for reading, the last 2 parts are coming in the next couple of days!