Sam/steve/bucky
It starts like this. They're all crushed together on a couch. It doesn't matter how big the couch is, they are all pretty big guys, most furniture is too small for them to cuddle and sprawl out on. Sam is sitting left side, Bucky on the right because he knows how cold that arm can get and, because Steve is right where he needs to be, cuddled up between them as they try to find something decent to watch. Which means that Sam and Bucky are tussling for the remote and bickering at each other, while Steve sits in middle getting jostled around. Until… well until he gets bent nearly in half as their wrestling and arguing becomes more and more hands on and he snaps a little bit.
Well, not so much as snaps, as quickly reaches up and grabs the remote away from both of them because he done with the fighting and switches the channel to some stupid rom com that he knows they both dislike. He doesn’t really enjoy them that much either, but that’s beside the point. Where he doesn’t mind them both Sam and Bucky detest them. He’s pretty sure that he’s heard Bucky say that they’re right up there with losing his arm.
They last a good 10 minutes before they break down and start to try and take the remote away from Steve. Who plays a game of keep away for a little bit before deciding that nope, he’s done, and shoves the remote down the front of his pants.
Which, is either the best idea he’s ever had or the worst, because both Sam and Bucky’s eyes instantly flick downwards for a few seconds before they look back up at each other and do that silent communication thing that they only have the ability to do when ever it’s anything to do with Steve. Looking between the two of them Steve can pinpoint the exact moment he realises how fucked he’s about to be. It’s when they both look back down at him and both of them have absolutely filthy smirks on their faces.