I'd really recommend watching the the show, but if you want the short version that's a spoiler if you care: that guy spends an entire season dropping really obvious hints that he's the other character's father. By obvious hints, I mean he pretty much tells him this at once point. Then after all that, this is how Buster figures it out.
basically the joke here is that everybody in the family has been dropping incredibly obvious hints that oscar is buster's real father (for 10 episodes or so), and he was completely clueless, but he figured it out when oscar said "pop secret" offhandedly.
I can't rate AD less than a five, but at some point its better to just submit episodes rather than every scene a minute at a time. Some episodes have already been submitted, and the show is available at several sites online.
You could splice together 15 minutes of the awkward pauses from that show, no dialogue whatsoever, and and I'd not only watch it, I'd five star that bitch.