Answer: ( Jones 1988, 65)
I believe that peeta tells katniss that his father knew katniss’s mother.
Although the Cunninghams are poor, they are viewed as very honest and prideful people. For example, we see this prideful side of them when Scout explains that the Cunninghams don't take charity in any shape or form and find their own way to do things(i.e pay Atticus using vegetables, nuts, etc).