So Aunt Lily is apparently not an aunt.
I don't know whether the Aunts' surname is mentioned early on or whether it's established which side of the family they come from, but Wikipedia lists their names as Lily and Vivian Charles. So wouldn't that mean that they were the sisters of Chuck's father, Charles Charles, and therefore Chuck is the product of an incestous relationship?
Hmm, just looked at the postcard that arrives late from Charlotte and the surname definitely begins with a C but otherwise is illegible.
Any thoughts?