Atticus starts to ask Tom Robinson about his convictions. He brings up Tom’s route to and from work and how Tom always passes Mayella’s house (remember, Atticus is trying to prove Tom’s innocence). Tom states that he would only go on her property had he been told to do so. Most of the time, it was to help Mayella with choppin’ or workin’ the property.
After answering some questions, it appears to Scout that Mayella is the loneliest person in the world. This proves that Mayella wanted him to come over. Atticus then asks Tom is he has ever stepped foot on the Ewell property without permission. He says no and Scout agrees as “a respectable Negro would never go up into somebody’s yard of his own volition”