Sorry but I don't buy it. JJW had a lot of consideration for Ben Horne and showed to be in love with Audrey. I really don't think he would turn his back to the fact that she was pregnant with his child. That seemed like a lame attempt to erase JJW from the story, which is odd, since even Evelyn and Malcolm were addressed to some extent.I think you’re underestimating what an emotional, complex position this is for a young girl to be in. There are plenty of reasons a headstrong-yet-vulnerable girl like Audrey might be too embarrassed, prideful, fearful of rejection, &c. to reveal the father, especially given the odd circumstances (her dad’s jet-setting protégée, after a contentious courting process, knocks her up then darts off to South America). It’s even possible that she reached out to JJW with the info and wasn’t happy with his response. The only person who knew she had sex with JJW was Pete, who died a couple of days after and presumably didn’t tell anyone.
Anyway, that whole pregnancy plot was very odd (and IMO a little bit of a stretch) and TFD seemed like a good oportunity to explain things properly. Too bad Frost blew it.