Flap's occupation and income
Okay, I'm not an expert on income and making a living, but Flap was an associate professor at a college in Iowa and later a head of the English department in Nebraska! The whole time they're in Iowa, Emma and Flap are totally lower middle-class. They live in an old dumpy home that's not exactly extravagant and drive the same Dodge station wagon over a 10 year period. Then when they move to Nebraska, the house is definitely a step up, but still not a show stopper.
If Flap was an elementary or high school teacher, I could understand, but college teachers aren't exactly making salaries of less than $50,000 a year, are they? Today's dollars I'm referring to; $50K was a lot in early 1980's.
Or perhaps Flap was spending money on young girls while in those places, hehe!
And what did Aurora do for a living. Was her deceased husband some debutante that left her millions of dollars?