For the record, I'm not defending that characterization of Babs. It takes the idea of "Babs wants to make things normal for Cass" much too far and basically assumes that Babs doesn't have the slightest familiarity with either the Batfamily or how complex the relationships between mentor/mentee can be.
I'm only pointing this instance out to show that this scene up here wasn't entirely out of the blue (and is in fact a lot more ambiguous). I'm not even entirely sure we're meant to think that Babs means "kiss" as in on the lips, here.
Oh yeah, and it took me a while to find it, but the quote's from Gotham Knights #35, which was written by Scott Beatty. Scott Beatty and his hit-or-miss Babs...