I wasn't quite sure what to make of her, since I assumed evidence that the husband was a killer would come out within the episode itself if we were supposed to think it was part of the pattern.

Since it didn't, I definitely think she'll be the human face of the victims. Which ties with Angel being the conscience of the show sometimes, as when he had to choose between reporting Doakes for shooting that war criminal or not. The audience, like Miami right now, can fall into the "so what if Dexter kills, they all deserve it anyway" thing, and Lundy arguing that murder is never justified isn't going to cut it, especially since he follows it up with "except to save an innocent life", which means fleshing the victim via one of his relations out as a human being makes storytelling sense.

I got a minoorly romantic vibe off them too, which I hope Lundy rebuffs. I just don't want Deb taken in like that again. :/

Oh quite. I mean, Deb has daddy issues, of course, and would be the type to mix looking for a Harry who pays attention to her with looking for a love interest, but the result would be disaster. So yes, here's hoping Lundy keeps it mentor/protege.

Glad someone shares my Gabriel confusion.*g*