Unless she is watching stuff that makes the innuendo crystal-clear (to a BY girl who has never been exposed to the “harsh realities” of those innuendoes before, and therefore would not understand them anyway), it is not your concern, if it is not her PARENTS’ concern (and apparently, they are not worried about it). I would stay out of it, unless asked for my opinion.
I remember seeing Shrek, which is rife with innuendo, most of which I MYSELF did not get, the first time around. I doubt a BY girl would get most, if any, of the referrences.