John Grady Cole is the

Nino's made references in his Jweb about going out with his whole family before, so I'm not really sure about the single mom thing. As for Okada, he just doesn't talk much about his family in general, so... not sure about that either XD It's also just possible that the fathers haven't been much of a presence as they were growing up, since most traditional Asian families leave all the child rearing to the mother while the father works, so they naturally have way more things to talk about when it comes to their mothers. :/