In the book to Kill A MockingBird what side does Aunt Alexandra take during the trial?

It is never made abundantly clear which side she supports. She doesnt seem to like the African Americans, shown when she doesnt allow Cal to act as the mother figure to Scout, but surely you would imagine that she would take the side of her brother. She also cries when she finds out that TOm Robinson is dead. That is standard evidence to support that she was for Tom Robinson in the trial.