That gives her pause; it simply had not occured to Shepard that he'd doubt her story. Then she snorts, because of course he would.

"Nope," Alright, maybe there's a bit of swagger in that tone, but if being from space is impressive, then she's got plenty to brag about, "Been all over the Galaxy, kicking ass and taking names. I've got a ship and crew; it's what I do."

Shepard was conscious of the thought that she was laying it on a little thick. So what? It was fine when Garrus did it, why couldn't she? Nothing wrong with a little truth in advertising.

"Haven't you ever heard that the truth is stranger than fiction?"