The moment Stark began talking, Steve's smile - which wasn't all that big to begin with - began to shrink, until it finally dropped off his face entirely. This wasn't a worst case scenario by any stretch of the imagination; Stark wasn't falling down drunk, for one, and he wasn't treating Steve with outright hostility. For all intents and purposes, he was technically behaving, but this was still a far cry from how he'd acted toward Steve while they were stuck in that elevator. There'd been an easiness to him then that wasn't present now, and it set Steve off balance, ratcheted his nerves up a few notches. For all that he hadn't interacted with Stark too much over the years, he'd never have anticipated coming face to face with a Tony Stark who was almost taciturn.
"Yes, thanks," Steve said, taking a seat on a sofa, watching carefully as Stark began preparing drinks, his movements practiced and efficient. Steve's drink was undeniably heavier on the liquor than the ice cubes, but Steve could sip at it, he supposed; surely Stark didn't expect him to down the whole thing at once. (That had been a thought he'd flirted with, actually, considering how much better Stark had responded when Steve wasn't quite himself. But considering how off the man seemed right now, courting tipsiness wasn't a risk Steve was willing to take.) He picked up the glass, weighing the heft of it in his hand, then brought it up to taste it, doing his level best not to wince at how strong it was.
It was a good thing he'd only taken a small sip, because Stark's next words likely would have made him choke. As it was, he lowered the glass, kept it cradled in his hands, then fixed Stark with a slightly wary look.
"Okay," he agreed, because this was something he wanted to discuss; surely this was a good sign, then. "What was it you wanted to talk about?"
Best to let Stark direct the conversation, he figured, at least until he had a better idea of where the man was going with this. Steve had spent a lot of time mulling over Stark's reactions when all hell had broken loose back in Eight, and he was still having trouble slotting them in with what he'd always assumed to be true of Stark. Why make the weapons only to be so horrified at seeing them in use? It didn't compute, didn't make any sort of sense in Steve's head, and he was looking forward to possibly hearing an explanation for that dichotomy.