Fair enough. It still remains to be seen if anyone who got Eli's grandfather's blood would have become super-soldiers, or it only happened because he was part of the family line (had Bradly DNA).
And yeah, babies out of wedlock have been drama sources since stories have been told (how many "out of wedlock" babies exist in ancient myth? Hundreds?). It should be said that in the Golden Age, comics where usually pushing for superheroes to marry before siring children in "imaginary" stories (or at least Superman), but then the Silver Age, and more specifically, the sexual revolution and comics became much less conservative. Back in the Golden Age, an "out of wedlock" child was a major taboo (as was divorce). That all changed by the 60's-70's. I mean, it took HOW long for TV to show a married couple sharing a bed?
That said, I don't think Brubaker could be any more explicit about who Sharon's baby's father is without inserting a sex scene and stating "AND STEVE'S SUPER-SPERM JOINED WITH HER EGG" in a caption.