Tony was just relieved that other Tony hadn't told him to buzz off or something equally mortifying, it was bad enough to have been caught staring, but at least they were kind of doing it together now? Maybe that was worse now that he thought about it. Whatever. But then Steve looked in their direction and lifted a hand to wave at them and well Tony was pretty sure it was about time for this place to reveal it's secret feature of the ground opening up to swallow him whole.
"Oh god I'm gonna die," He said it lowly, mostly to himself, because he did not need this other Tony knowing that his death was imminent, even if it might make things easier on him, but he was pretty sure that he'd been heard, just like every other horribly embarrassing moment that had passed since he'd been caught.
This was not how he wanted today to go and maybe he should wave back at Steve, but he couldn't manage it so if anyone was going to wave it was going to have to be the other Tony and well - that was just.... yeah. He was in way over his head right now.
All in all Tony could only be grateful that he wasn't closer, because he'd truly be dead if he were.