Dean didn't even know he was cursed.
It was a normal hunt, normal everything; stupid witch, stupid hex bags. They got rid of her in the middle of a spell and drove off. At least, he thought it was the middle of her spell.
But one week later and his chest pained him like crazy. His pecs were larger, somehow, fuller looking. They were firm, but not the kind of firm, where you felt muscle, but more like… they held something.
Sam noticed Dean's cringes sometimes when he lay down on his stomach or something, but Dean never brought it up, so he let his brother be.
Another week later, Dean was tearing up his car and duffel in the middle of the night while Sam was asleep, searching for a hex bag. He didn't even know if it would work if the witch was dead, but this curse was interrupting his sleep goddammmit, sleeping on his back felt weird; half his scars were there.
He rubbed his chest, biting his lip in pain when he found that slight pressure was too much. He got out the car and snuck into the motel room where Sam lay sleeping and got back in bed, cursing as he tried to fall asleep.
Sam looked at him the next morning when he walked in with breakfast. "You okay, man?"
Dean looked up, raising an eyebrow. "Yeah, yeah, I'm fine. What's that, tacos? For breakfast?"
A week and some passed, and Dean was ready to cry. Everything hurt now. His nipples were so sensitive the brushing of his shirt against it was too much. And his pecs had grown so much that his shirt was actually tight.
He took off his shirt, checking the time, knowing Sam probably wouldn't be back for another fifteen minutes. He felt full, somehow, like he needed to release. He tentatively brushed a nipple and hissed in pain, feeling a burn shoot through him, like brushing an open wound with a dirty finger.
Cupping a handful of cold water, he drizzled it over, which eased, as cold water eases practically anything, but they reverted to their earlier painful state. He bent his head over, staring down at his nipples. They were darker than usual and fat, swollen almost.
Dean didn't know what to do. Doctor? Look it up? Leave it be and hope it goes away? He snorted at the last one; fine job that was doing him.
The door opened and Sam came in, stopping when he saw Dean, shirtless, on the bed, his eyes glued to Dean's chest. "Dean-"
He reached for his shirt but Sam strode over quickly, staring down at him. "What… this is what's been troubling you, isn't it?"
He opened his mouth to protest but Sam gave him a look that said don't even try and he sighed, defeated. His cheeks began turning red as Sam stared at his larger chest and he almost felt like a girl, wanting to cover up.
"Dean, let me see," Sam said, seeing him eye his shirt.
"Isn't anything to see, Sammy," he replied gruffly, looking everywhere but at his brother.
"Dean."
He sighed and remained tense under Sam's persistent glare before finally throwing up his hands. "Fine! But s'not like you could do anything anyway."
Sam stooped in front of Dean, shifting closer in between his brother's legs. He brought up his hand and Dean recoiled. He pulled back. "Dean, it's me, relax. M'not gonna hurt you."
His older brother rolled his eyes. "Just hurry up, will ya? M'hungry."
Sam placed his hand on Dean's pec, eyebrows raising at his firm the flesh was. He pressed gently, stopping when Dean hissed. "Does it hurt?"
"I should think yes, Sammy," Dean replied, teeth clenched.
Sam bit his lip, eyeing Dean's swollen nipple. He moved his fingers to it gently, brushing over it. Dean bit his lip, feeling the burn.
"Does that hurt?"
"Yes."
Sam furrowed his eyebrows. "Just, bear through this, okay?"
He shut his eyes, not wanting to know what, and Sam began tweaking and pulling at his nipple. "What the hell, man?" he cried, jumping, toes curling as he tried not to cry out at the pain.
"Relax Dean, please."
He breathed out, shoulders still tense, but remained still.
Sam began rubbing it again, pulling the swollen flesh between his fingers. Dean felt something give in his chest, like a barrier broken and the pain was gone. His eyelids lowered again, letting Sam rub his nipple. Soon, it wasn't dry flesh rubbing against dry flesh anymore. He looked down, feeling something wet, and saw Sam pulling away his hand, looking at Dean's nipple.
A white, creamy liquid had seeped out, a bead forming on his nipple. Dean felt ease, in the slightest, but still ease in the pressure that he seemed to carry around in his pec. Sam's hand reached out and a finger caught the bead. He watched as Sam touched it to his tongue and his eyes widened.
"What're you doing?!"
"It's milk. Dean, it's milk."
"Dude, you just tasted that?"
"Dean." Dean stopped freaking out about his leaking nipple and the fact Sam tasted it for a while to look at him.
"It's milk."
"Yeah Sam, I got that far."
Sam watched Dean's nipple as another bead began forming on it. It tasted good actually, really good. It was sweet, rich, creamy. He licked his lips unconsciously, watching Dean's swollen pec, and a hunger seemed to open inside of him.
Dean stared down at his chest, paying Sam no mind. "I'm… I'm lactating? That friggin witch!"
"Probably a… a curse," Sam choked out, trying to find a straight thought in his head, but all he could focus on was the drop growing bigger and bigger.
"Dean… it hurts, doesn't it? Holding all that, that stuff in."
His brother wouldn't meet his eyes. "M'fine."
Sam licked his lips again, desperate to taste it. Just one more drop. Dean saw Sam start to lean in and he watched, confused. "Sammy?"
With a soft whimper, Sam lunged forward, sliding his tongue against Dean's nipple, getting that sweet drop. Dean groaned at the feel of Sam's hot, wet tongue against his nipple. Sam pulled away, eyes never leaving Dean's nipple and he swallowed, an expression of bliss coming over his face.
He leaned forward again and latched on before Dean could say anything. He sealed his lips around Dean's nipple and slid his tongue against it again, making Dean's eyes roll back in pleasure. Nothing came and Sam's hand went to his pec, pressing gently as he licked.
Dean felt as though some block was removed and the pressure began flowing out. Sam groaned around Dean's nipple, beginning to suck as warm milk flowed from him, sweet and creamy. He drank hungrily, pressing close to Dean and pulling on his nipple.
Milk flowed faster now, thick and rich. Sam moaned as he took in another mouthful, tasting how sweet his brother's milk was. He swallowed mouthful after mouthful, savouring each swallow. He got on his knees, letting Dean's nipple fall from his mouth for a second before quickly taking it between his lips again. He suckled for a long while, not able to get enough of Dean's milk.
His older brother groaned, leaning forward and placing a hand behind Sam's head, pushing him against his chest. Sam drank eagerly, lapping up the milk that squirted out, keeping the hand on his pec as if to make sure Dean wasn't going anywhere.
The milk filled him, incredibly satisfying, but he wanted more. He pushed Dean's pec but the flow trickled down, his pec no longer swollen but back to it more or less normal size. Sam whimpered softly at the loss, licking as many drops as he could find, until he remembered Dean's other one.
He released the now deflated nipple and leaned to the side, fastening onto the milk-filled one, wrapping his lips around it and suckling the warm liquid from his brother. Dean pushed into Sam's mouth as his little brother drank from him, combing back his hair.
Sam sucked eagerly, feeling himself getting full but not wanting to stop, not yet. He swallowed more and more until the flow slowed. He greedily pressed Dean's pec, milking him for the last few drops before pulling away, staying on his knees and looking up at Dean.
They were silent for a while, Dean feeling too exhilarated from what just happened; the feel of Sam's hot mouth around him, the ease at which his brother took away the pain from weeks before. Sam chewed on his lower lip before his eyebrows creased and his eyes became moist.
"Dean… Dean please, I'm sorry… I couldn't help it… I'm sorry…"
Dean ran a hand through Sam's hair, massaging his scalp. "Don't apologize Sammy. It's okay, relax. I don't mind, you're not hungry anymore, I don't hurt anymore, and everything's okay. We'll figure out this curse, alright? Don't worry, little brother."
Sam let out a breath and Dean pulled on his shirt, which now fit like it did before. "Now, was that burgers I smelled?"
The next morning, Dean woke up to Sam sitting up on his bed, cross legged. He closed his eyes again, but he could practically hear Sam thinking and once more opened his eyelids. "What is it?"
Sam started, looking over at Dean, cheeks flaming. "N-Nothing."
"What, Sam?"
"I… I was wondering… if I could… um…"
"What?" Dean asked, puzzled as Sam turned even redder and looked all around the room, fidgeting with his fingers. "Go on."
"If I could… drink again?"
The words were choked out, so soft Dean had to strain his ears. "You want more milk?" he asked.
Sam huffed, cheeks now crimson and unfolded his long legs from the bed. "Nevermind, it was stupid…" he said, voice thick with embarrassment.
"No, no, Sam, I'm sorry, I just wasn't sure I heard you properly, you said it really soft, man. 'Course you can, c'mere."
Sam looked at him, eyes wide. "Really?"
"You're so slow, Sammy."
"Am not." Sam crossed over to where Dean sat on his bed and climbed on top of him, sitting on his lap and hesitantly reaching for Dean's shirt. His older brother rolled it eyes and pulled it off in a swift motion.
"Knock yourself out."
Sam leaned down, licking his lips in anticipation. A slight shudder went through Dean as e felt Sam's breath on the sensitive area. His pecs had filled up again during the night, and Sam knew it. He placed his lips around Dean's nipple, tongue prodding and cheeks hollowing until the milk flowed out.
He pressed Dean's pec as he licked, coaxing out more milk faster, lapping up the white flow. He hummed around Dean's swollen nub, drinking vigorously before moving on to the other, milk swollen nipple, drinking until it was empty. He sat up, licking his lips and looking at Dean, a bit uncertain. "Was that… is that okay?"
Dean smiled, amused at him and nodded. "Don't havta ask, Sammy."
Sam grinned back. "Now get off me Sasquatch, you're not five anymore. Get me some breakfast," Dean said, sitting up and giving Sam a shove. His little brother clambered off and grabbed the keys while Dean went into the bathroom.
That day they went to interview some victims for the case they were working on. As they got back in the car, Sam tugged on Dean's sleeve. "M'hungry."
"We'll go get lunch, s'like half twelve already."
"No, I'm hungry, Dean."
Dean looked over at Sam, who put on his puppy eyes and stared at him hopefully. He rolled his eyes but drove off, turning down a deserted street and pulling to the side. He shrugged off his jacket and unbuttoned his shirt halfway.
Shifting away from the wheel, he raised himself to sit on Sam's lap, straddling him. He pushed open his shirt and put a hand behind Sam's head, guiding him to his pec, where Sam's lips wrapped tightly around him. He leaned back and closed his eyes and groaned softly as his little brother suckled.
About ten minutes later, after Sam lapped up the last drops, Dean did up his shirt and got behind the wheel, driving to a diner. "Tastes so good," Sam mumbled, licking the sides of his mouth.
Dean chuckled. "So freakin greedy, Sam."
"Whatever."
That night, as Dean finished his dinner, he rolled his eyes as he felt Sam's hand rubbing up over his shoulder and down to his chest, rubbing the sensitive nipple.
"Deeaan."
"Didn't you just eat?"
"I haven't drunk anything yet."
Dean rolled his eyes again but pulled off his shirt and opened his legs, letting Sam come between them and suck the milk from him. Dean ran his hand through Sam's hair, urging his baby brother to drink more.
"Gonna get stronger from this you know, Sammy."
Sam hummed around him, too busy taking in the milk.
"Feels so good, drink up, go on."
And Sam certainly followed those orders, sucking until nothing more came out. He licked Dean's nipple a few more times for good measure before straightening. "Get to bed, Sasquatch. We got a vampire's nest to clean out tomorrow."