Answer:
Atticus comments that Mayella Ewell has accused Tom Robinson of assault and in order to get rid of her own guilt. He says that guilt motivated her because she broke a "time-honored code" of society. The code that Atticus is referring to deals with interracial relations. In 1930s Alabama, it was socially unacceptable for a white person to have relations with a black person.
Explanation: hope this helps :)
