[She actually has a theory about the first point Clark brings up, based on the conversation she's had with Brandon, and she'd been debating exactly how to say that to Clark without feeling like it was a betrayal to Brandon.

But then she's getting yelled at all of a sudden and all it serves to do is raise her hackles. Nevermind that he's Superman, Steph just stares at him, utterly uncomprehending for a long moment before her expression turns to anger]

How is that any of your business?

[It's not the same as her bringing it up in the context of talking about superheroes. This is just some dude she barely knows acting like he has any right to question what she does in her private life.]

Why does it have to be that I let him do something? God forbid it was my idea, right? Because I'm just - what, some silly little girl that needs protecting?

I thought you'd be better than that. [Her tone is practically dripping disappointment, and there's something like hurt underneath it.

She should've known he couldn't be as good as she'd hoped.]