Sharon was a very talented spy. She could hide her true intentions behind any number of faces--it was what she did for years and years. When she first met Steve Rogers and got pulled into all this superhero mess, she'd been working undercover. But seeing Tony Stark standing in front of her... she couldn't hide the shock.
His response showed that he'd seen the shock. And then he was getting her a chair, and he didn't look like a ghost, and she felt like she might fall over, actually, so she took hold of the arm of the chair and plopped down into it. Those drugs would be really great right about now.
Her eyes never left him. She had to remind herself to breathe. Was this what a panic attack felt like?
"I... I did. I was outside of the... the government building in DC, and... I must have teleported?" She shook her head a little. "How are you not dead?"