Charlize Theron and Diablo Cody on busting the myth of the supermom in ‘Tully’

Two years ago, screenwriter Diablo Cody was in the middle of trying to write “a very big, commercial, four-quadrant movie” when she gave birth to her third child. After her first two kids, she had gotten back in the groove of work, but this time, shattered by exhaustion, she felt herself floundering…