Also think of it from Stan's pov. He has in his head that they're Illegals. When he talks to Tim he can speak about Paige but when it comes to her parents there's just sort of ... nothing.

That's exactly what Stan would be looking for. He's starting to realize how superficial their lives are. Stan himself is private, but since he's met them he's had a boss he was somewht close to, a secret mistress, a couple of girlfriends, co-workers he complained about, an ex-wife, a son, his ex-wife's new guy. All of Philip and Elizabeth's history is hidden. You try to go deeper and there's nothing there. It just goes vague. They're not...in the church. They have no family to speak of.

Henry knows their habits, but can't explain them. He has noticed enough for questions, but just isn't insisting on knowing the answers.