[How much has he already been able to glean from her? Pepper can't tell, but she doesn't want to give away more. She has to keep her own reactions in check, and maybe hope that the guards that have already taken a shot at her might show up for a second try before Loki can press too much more. She may be afraid, but Pepper won't let that rule her.]

I didn't, no. [A small grin tugs at the corners of her mouth then. Loki isn't the only one who knows how to sass.] But since you asked...no, I don't care to explain it to you.

[She doesn't want to be the one to detail how he'd tried to conquer the Earth, or threw her lover from the top floors of a skyscraper. She doesn't want to tell Loki that he was the one to kill her friend.]

There's still a job to do. We should get back to it. [And ideally, she could get away from Loki long enough to warn Tony about his presence.]