He didn't stop her from rummaging in Tony's piles. As far as the soldier was concerned, it was all junk. He assumed the man wouldn't leave important pieces of a reactor laying about and as far as he knew that was the only thing the other Avenger was working on for the moment.

Steve grinned and shook his head, he walked right into that one didn't he?

"I don't know where to start," he admitted. "I'm a soldier. I signed up during World War II. It took quite a bit of determination to get that far. I had a few health issues. Now I'm part of a team of superheroes."

So he skipped a lot there, he didn't know how much he wanted to tell someone he didn't even know the name of yet.