In Batman V Superman: Dawn of Justice, after Superman saved Lois from the fall, he dropped her down and he went back to fight Luthor ... During that time Luthor reveals that he has Martha as hostage and he asked Superman to kill Batman.
Then Superman came down and said to Lois that he has to go to Gotham and kill Batman or convince him to help him but he never mentioned a word about Martha. So how come Lois knows that Luthor has Martha and how come she came and saved Superman from Batman during the fight?