fiscal-responsibility gave me this prompt: Wincestiel group costume!
Hope this is okay, love!
"This is fucking stupid, Dean. I don't wanna wear this! I don't wanna wear anything."
Dean leans against the door frame and bites his lip to keep from full-on laughing. "C'mon, Sam, let us see! And you can thank Cas for the outfit, by the way. He thought it'd look sexy on you."
"It's too small."
"Shh, Sammy. This ain't for anyone's eyes but me and Cas, okay? Be nice and I'll blow you later, hmm?"
"You'll blow me anyway and you know it."
Dean’s breath catches in his throat, mouth watering because now he’s thinking about it. He’s thinking about his little brother’s huge fucking cock filling his mouth. "Mm, okay. How ‘bout this. Come out and you're in charge of me and Cas tonight. Both of us will do whatever you want, but only if you get your ass out here right now."
Sam usually took orders from Cas so this would be a real treat that Sam would be stupid to decline. And his little brother was far from stupid.
The door swings open and Sam's chest heaves in his Robin costume. How Sam managed to get it on at all is beyond Dean because yeah - it accentuates every muscle on Sam’s upper body, clinging to him.
"Seriously? Batman and Robin? Not very original, Dean."
"Yeah, well. Your dick seems to like this unoriginal idea just fine." He points at Cas a few feet away in a short green dress, slowly stroking his wet cock as he watches them, eyes dark and hungry. "Anyway, it was either that or Poison Ivy, dude. Now," Dean purrs, turning around to place his hands on the wall and roll his hips, a deliberate attempt to provoke Sam into action. "You gonna fuck me or do I gotta beg? ‘Cause m’not really the begging type.”
“We all know that’s a lie, Dean,” Cas disagrees but Dean can’t feel offended because the angel is moaning and the noise makes his dick throb and there’s an unmistakable sound of skin on skin - Sam’s kissing Cas, which just makes Dean hornier.
Dean smiles in victory, turning his head to stare at Cas’s kiss-swollen lips when Sam finally crowds into Dean’s space and sets to work tearing off his Batman costume.
