Chapter Text
The early morning haze of just waking up was always a blissful feeling for Sam. The soft sheets of his warm bed and the even softer and warmer body of his brother, didn't help his struggle in getting up. The familiar scent of Dean's deodorant sent a thrill to Sam's head that he never got tired from. But the pressure in his bladder told him to either get up, or to risk wetting the bed.
Deciding that he didn't want Dean to hold another embarrassing moment over his head, and just when they're about to become parents, Sam swung his legs off of the bed and hauled himself up. Taking a brief moment to stretch, Sam yawned before he rested his hands on his rounded belly. Gently, Sam smoothed his hands over the tight skin and started for the attached bathroom. Greeting the cold tiles with his bare feet, Sam shivered as he took off his underwear and took a seat on the toilet. Releasing his bladder, Sam shivered since the plastic seat was just as cold as the rest of the room, though, Sam didn't mind. Just knowing that he and Dean got a new bathroom to themselves made him happy.
After Sam finished his business and flushed the toilet, the teen stopped to gaze at his reflection when he caught sight of his belly. Stepping back to get a full view, Sam eyed his naked, slim figure and the obvious gut that harbored his unborn child. Since he started growing with the pregnancy, Sam would swear that he looked even more femininely than when he and Dean first came to live with Bobby. His hair was shoulder length, his hips were wider and his face seemed...softer.
Suddenly feeling hands wrap around his middle, pulling him in, Sam gasped and turned around; only to find Dean, with a half-awake look on his face.
"Jesus, Dean." Sam hissed as he tried to get out of Dean grasp. The older Winchester chuckled as he lazily pulled the younger into a languid kiss, the kind that left people breathless.
"Just wondering where my wife and child went to." Dean mumbled as he got to his knees and kissed around Sam's belly.
"Dean." Sam breathed as his older brother's hands slid up and down his thighs. This feeling sent waves of excitement to Sam's mind, and wondered if Dean was gong to take him right here. But then, Sam felt Dean's hands slid up to his ass and pulled his cheeks apart, causing the boy to gasp.
"Dean." Sam said again. But this time, his voice had more of a whine to it. This was music to Dean's ears. So figuring that he could lead Sam to their bed, Dean brushed his fingers against Sam's hole, finding slick. Dean hummed as he peered up to little Sammy Winchester, who in turn, looked away and blushed.
"Wanna have some fun?" Without saying a word, Sam nodded, but then, gasped when the older boy scooped him up into his arms. As Dean carefully maneuvered his young wife through the doorway and onto their bed, Sam began to pant. Dean startled for a second, having never seen or heard this from his little sex partner. But one look to the younger boys, needy expression, calmed down Dean's nerves. Feeling in control again, Dean set his mind back on the task at hand.
Since he was already naked, Sam sat back and watched as Dean slowly stripped out of his underwear. Dean then started playing with his dick, jostling it around and making it come to life. Seeing this, and without being able to touch himself because of his belly, Sam kicked at the blankets in frustration. When Dean saw this, he held back a laugh, but hopped onto bed, moving in to satisfy his brother's desires.
"Need me that badly?" Dean mussed as he glided his hand up Sam's leg and onto his junk. The other hand snaked around Sam's shoulders and leaned the boy up. When their faces were just inches apart, Dean relished the vulnerable look in his brother's eyes and leaned down to kiss him. From Sam's view, nothing turned him on more than seeing the beast his brother became when they got intimate; the kind of beast that knew all his good spots and what he liked. After his hand had brought his own dick to attention, Dean lifted Sam's right leg and hiked it onto Dean's shoulder. From here, Dean's free hand began to massage Sam's pert little ass, occasionally teasing his hole.
"Oh, ohhhh." Sam dragged out as Dean released him from his grip and shuffled down the bed. Hiking Sam's other leg onto his free shoulder, Dean blew at Sam's puckering hole and smiled when he got a reaction from him. Sam rubbed his arms, trying to rid himself of the goosebumps. The filthiness of the moment was clouding his mind and knowing that it was his brother that was doing this to him, kept him grounded in the moment.
"Dean." Sam cried as his felt his brother's mouth close around his privates and started sucking. The tingling from Dean's mouth travel through Sam's smaller cock and throughout the rest of his body. From this, Sam felt as though he were in Heaven.
"Fuck..." Sam swore as he tried to arch his back, though the weight of his belly was making that too difficult. Dean smiled around the dick he was sucking and thought how dirty Sam sounded, cursing with his young voice. But as Dean felt the throbbing in his dick get painfully hard, he pulled off and climbed back up to face Sam.
"Ready?"
"Yeah." Sam said in a breathless tone. Dean relayed another kiss before he got back on his knees and pointed his dick for Sam's love-chute. Looking over his belly, Sam felt his own dick throb at the sight of Dean connecting them. He imagined the slightly-pointed tip of Dean's horse cock, slowly plunging into his anus. And when he felt it, Dean's cock entering his ass, Sam let go of a moan that was building in his throat.
"Aaaggh!"
"Oh, fuck, Sammy." Dean huffed as his half-lidded eyes peered to his brother, grabbing onto the headboard. "I'm gonna fuck more kids into you, baby-boy. Gonna keep you knocked up." Already halfway in, Dean leaned down and grabbed into Sam's neck with an iron grip.
"Wouldn't you love that, getting fucked, and knocked up by your big brother?" Sam met Dean's eyes with his own surprised ones. The dirty-talk wasn't something he and Dean did often, but in the rare case that Dean did do it, he said somethings that made Sam loose his mind. The erotic moment was interrupted by a small kick from Sam's stomach. At first, Sam's head almost didn't register that it happened until another kick came.
"Oh!" Sam gasped before he looked down. Kick. But this time, Sam guided Dean's hand just in time to feel it, too. Sam smiled when he felt the movement inside his tummy, but thought it was a little weird that his kid was starting to get active while his fathers were having sex. In Dean's head, his reasoning was breaking under the hormones of his body, pushing to breed Sam's hole and shower his son in cum. But, still in the moment he could think clearly, Dean leaned down to kiss Sam's belly. Sam thought it was sweet when Dean did this, but shuddered when Dean then licked a strip up his belly. Dean didn't stop until his tongue slipped into Sam's mouth and started pushing the rest of his dick in.
"Deem!" Sam tried to say around Dean's tongue, but the older brother wanted nothing more than to turn his Sammy's brains into mush. So with one hand, jacking Sam's cocklet, Dean was pleasing his little brother though his ass, dick and mouth at the same time.
Almost like it was teasingly slow, Dean moved his dick in and out of Sam's hole while his hand and mouth were hard at work. With his tongue, Dean guided Sam's tongue out and flicked them around each other while their lips occasionally met. With his hand, Dean stroked Sam's five inch dick in a gyrating motion. Every once in a while, Dean would smear Sam's precum around with his thumb and listen to his brother whine. When Dean's thrusting got a little quicker, he pulled his mouth away from Sam's and took a mental picture. Because while he knew sex had quite an impact on Sam's developing body, the space-out expression he was wearing only made his thrusts come quicker.
"How's that feel, boys? Gonna cum yet? Spray your shame all over my dick, while I bathe our son in a hot, white bath."
"Dean!" Sam cried out as he felt his son kick in response. But this time, the kick didn't hurt. Rather, it felt kind of good to Sam.
"You look like an absolute dream, speared on my dick, pregnant with my child and moaning like the world's ending." Dean smirked as he leaned over Sam's body. And from here, Sam wrapped his legs around Dean's back and hooked his arms behind his neck.
"Don't stop." Sam said with a broken voice, and Dean was happy to do just that.
Like a jackhammer, Dean snapped his hips back and forth, creating a slapping sound that echoed off of the bedroom walls and down the hallway. The sensation caused Sam to loose his grip and fall back onto the bed, rolling his head and moan loudly. Dean was living in the moment as he watch his kid brother loose himself, and felt the end coming. But feeling like he needed one more push, Dean thought of something else to say and leaned close to Sam's ear.
"I'm gonna fuck the next generation of Winchesters into you, baby brother. Then they'll fuck and make the next. Our family will repopulate the mid-east. Ain't that right, son?" Again, Sam and Dean's child kicked, sending another wave of pleasure Sam's teen body.
"After he's born, we'll give him some siblings, won't we, Sammy. He wants a big family, and so do I."
After a few more hard thrust, Sam came with a scream. Cum splattered onto Dean's abs, chest and the underside of Sam's belly, courtesy of Sam's cocklet. Dean shot his load deep onto Sam's ass and felt his whole body spasm with the torrents of cum his dick spewed.
Minutes after the high had faded, Dean laid against the headboard of his and Sam's shared bed and held Sam in his arms. Without a doubt, that had to be the best fuck Dean ever had with Sam, to date. Thankfully, Dean hadn't been too rough and Sam's ass was without injury. So after wiping the excess cum away, Dean cuddled Sam's nude body and brought the blanket over them. The afterglow of his incestious union with his little boy-wife, left Dean satisfied and hopeful for the future. Dean still did have his worries, but one look to his sleeping lover reminded him that he would do his very best to make a great life for their family. Placing a soft kiss against his brothers brunette locks, Dean then shuffled down, keeping Sam curled on his chest, Dean closed his eyes and fell asleep.