Dean couldn't hide his shocked expression as those words fell from his brother's mouth or when he stood up, getting out of bed, without being asked. His father walked over to the chair in the corner of their room and pulled it out into the middle of the empty space at the foot of the beds.
"Come on, don't keep me waiting," he said, motioning at the chair. Dean sat up against the headboard and watched as Sam walked over to the chair and placed the his palms against the back of the chair. He walked his feet backwards, leaning against the chair and pushing his hips upwards. His underwear was hanging loosely from his hips and Dean was only vaguely aware of what he expected to come next. John walked over to Sam and tugged his underwear down to his ankles, throwing them aside when he stepped out of them. Dean had been used to his father sleeping fully clothed in case of emergency, but he looked strangely overdressed now, next to Sam.
"Now Sam, what am I going to do?"
Sam mumbled something that Dean couldn't quite hear.
"No, Sam. I want you to say it so your brother can hear it. I want him to know what happens when you misbehave. Say it."
"You're going to spank me."
"And why am I going to do that?"
"B-Because," Sam said, his voice faltering. "Because I was disrespectful."
"Are you sorry?"
"Yes."
"Then tell me. Properly.
"I'm sorry," Sam said. "I'm sorry for being disrespectful, Daddy."
Dean didn't know what to think. He was surprised at how quickly Sammy had slipped into this... role. They'd obviously done this before. A lot. Not that he could be mad, or jealous, not after what he'd been doing with his father since his brother had left them, it was just surprising. He watched as his father placed a hand softly on Sam's ass, moving it in small circles. Dean could see his brother trembling in anticipation and he thought it might just be rubbing off on him. He bit his lip waiting for his father's hand to rise and he heard Sam whimper when it did. John brought his hand down again with a firm SMACK, loud enought to almost drown out Sam's groan.
"Thank you, Daddy."
Another slap came down before Sam had time to expect it and he whimpered.
"Thank you."
Dean palmed his erection through his underwear as he watched John lay another firm smack across Sam's cheek, his skin beginning to flush red under the force. Sam just whined and thanked him again, his hips jutting up higher. He watched as his father raised his hand and kept it there for five... ten... he got to thirteen seconds before Sam was trembling again, words practically falling out of his mouth.
"Please, Daddy, I did wrong. I'm sorry, Daddy, need it, deserve it."
Dean caught the twitch of a smirk on his father's face as he brought another firm palm down onto Sam's ass and the noise he made was too much. Dean slid his hand under his boxers and grasped his cock, stroking it, almost fucking coming every time John brought his hand down on Sam's slowly reddening skin, every time Sam thanked him.
"You better have been counting, boy," John said. Sam made a noise that sounded like he just remembered that he had to breathe.
"Y-yes. Fifteen, Sir."
"Okay, well I think that's enough for now, then. Stand up, baby."
Dean watched his brother move away from the chair. His ass was practically glowing, an obvious handprint stamped red into his flesh. Dean let out a groan as he squeezed his cock and his father span round to look at him.
"Dean, behave."
Fuck. He pulled his hands out of his underwear and laced his fingers together, trying to focus on the pressure on his knuckles instead of the aching in his groin. Dean thought that they were done, but then his father had an arm around Sam's waist.
"I've missed you, son."
"I've missed you, too, Daddy," Sam replied.
John hitched Sam's legs up around his waist and carried him back to his bed, laying him down on his back. It looked odd, Dean thought. Nobody should be able to carry Sam like that. Dean saw his brother wince, his facing flushing with arousal as the sore skin of his ass brushed against the fabric sheets. He twitched as pressed rough kisses against his jaw, moving quickly down towards his cock. Dean thought he was going to see something he never thought he'd see: his father giving Sammy a blowjob, but John went straight past his cock, to much protest from Sam.
"Hush now," John said, in stark contrast to how he treated Sam only moments before. Sam gasped as John's lips pressed against the edge of his ass, his facial hair rough against the tender skin. He reached down and opened himself, moaning softly as his father's tongue darted into him. He started to whimper and thrust into the air as John sucked and licked at his hole. He was trembling again by the time he stopped, replacing his tongue with his fingers. Dean bit his lip as Sam pushed down, trying desperately to fuck himself onto the fingers pressing into him and before he knew it, he was crawling across the bed to get a better look.
Sam looked so perfect on his back like that, looking like any coherent thoughts had been lost at some point duing the spanking. He was groaning loudly, thrusting up and down on the bed and Dean knew that his ass must be sore. His cock was twitching occasionally and Dean just wanted to reach out and touch him. He tried but the creaking of the bed betrayed him and his father looked up, a smirk crossing his face. He pulled his fingers slowly out of Sam and gave a last kiss to his hole.
"Sorry Sam, I'll be right back. Your brother obviously wants some punishment, too."
Dean's stomach flipped. He'd done things with his father lately, but it hadn't been anything like this. Sam was the painslut. Sometimes, when John was stressed, Dean let him choke him. He wondered if Sam had let him do that, Sam would enjoy that. He watched as his father took off his belt. Fuck, surely not? Dean, he liked pain, but there was a difference between beating pain and cutting pain and he wasn't sure he was ready for this. That's why it shocked him when his father grabbed his wrists and forced them behind his back, securing them tightly with the belt.
"No touching. Yourself or anyone else."
"Wha- why?"
"Because I just spanked your brother for touching you but you were urging him to do it," John said. "Plus, you marked him. Do that if you want, but you can't just expect me to not punish you."
Dean watched his father walk back over to Sam, who had finally stopped trying to hump the air. He was pretty sure that was about to change, though. John pulled a bottle of lube out from his bag and squeezed some onto his fingers, making Sam yelp when he pressed them into him again. As Dean watched his brother start to move again, he strained against the belt around his wrists. He needed some kind of friction; all he could see was Sam twitching and thrusting.
"Do you want to ride me, baby?" John asked, pulling his cock out of his pants.
"Ngh, please, Daddy," Sam begged, trying to follow his hand as John slowly pulled his fingers out of him again. He got off the bed and dragged the chair around again, so that Dean could see it. He sat on the chair and motioned for Sam to come over. He almost stumbled as he raced to get over to the chair and, with John's help, he straddled his lap. Dean whimpered as he saw their cocks rub against each other, he wanted to just be there with them and lick, taste. Sam pushed his feet into the floor, standing up slightly and positioning himself over the tip of his cock.
"Come on baby, do it for me."
Sam groaned as he lowered himself slowly, stretching himself open on John's cock. Dean couldn't see how Sam was going to last much longer, not knowing his brother and what he'd already received. He tried raising his legs, folding them into a foetal position, to try to get some friction, but one glance from his father told him to stop.
"Please," Dean whimpered. He was so hard that he couldn't fucking stand it. He decided to try something. "Daddy? Please?"
John's mouth twitched at his words, but Dean wasn't sure if that was just because Sam had pushed himself further onto his cock.
"Be patient Dean. You'll get what you want, if you can stop being such a goddamn slut."
Just then, Sam wrapped his legs around the back of the chair, his arms around John's neck. He waited for John to grab hold of his hips and thrust into him, making him start to moan, words forming on his lips.
"Oh, fuck. Fuck me Daddy, harder."
Dean's legs were shaking as he watched them, John's fingers tracing over the letter carved into Sam's back, trailing his fingers down his spine and digging his nails into his hips. He watched Sam lean forwards, pressing his cock against his father's torso for friction, his lip pressed hard between his teeth, a trickle of blood beginning to run down his chin. Oh fuck, Dean wanted, needed to go over there. He needed the taste of Sam's blood on his tongue.
Dean could hear Sam's breathing now, it was shallow and quick and Dean knew he was close. He watched as his father pulled Sam down harder onto his cock and then Sam whimpered loudly as John squeezed the base of his cock, hard, to stop him from coming.