I mean, I was really trying to keep it a secret! [So it's not really a matter of him being dense! ... Although she wouldn't have expected him to be the first (?), only (?) one to notice by far, so maybe his point stands.]

Christ. That's almost the entire time. [She could die right about now, but instead she screws her eyes shut and tries to not freak out, and then looks back at him again.]

You didn't tell dad, did you? He'd kill me if he found out who it was.