She has a flashback to when she was a teenager and recalls an incident where Atticus planted the seed for an idea in Henry's brain, then let him come to the right conclusion on his own.
She has a flashback to when she was a teenager and went to her first dance. During the flashback she recalls that there was an incident where Atticus planted the seed for an idea in Henry's brain and then let him come to the right conclusion on his own.