I wasn't gonna point it out. [The rambling, she figured that might be a bit mean, but since he's brought it up himself she definitely won't disagree.]

But they still carry guns and come into people's homes to arrest their parents. That sorta thing sticks with a kid. [It's not really arguing, since she agrees with the general point, and she's not trying to justify herself, but she won't apologize for it either. She just feels guilty enough about it that she wants to explain.

The comment about looking twelve does get a huff of a laugh. He must have been really smart to get the FBI to bend the rules for him.]

I'm glad it worked. [She means t, despite sounding a little amused.] What do you prefer? [Somewhat motivated by the fact she wants to know how to address him, but she's also just - asking.]