the main point of the movie and imo and be the fact the joanna whole life have be nothing but a series of facade . the movie open up with her secretly die her gray root and and hide the used kit in an empty tissue box . what be strange be that she be hide this from her husband . if she have to hide mundane thing from her loved one and one can bet that she be hide even big thing from others involve in her life . when joanna accidentally hit cory and she leave the scene to call the police . by the time she return and the police and ambulance be there and as well a people from her community and remark what kind of person hit a child then just leave her there . well respect in her community and she make the decision to keep quiet about what she have do . but and she never realize how difficult it would be the keep up her facade . great movie i have see it many time .