From the script:
Anakin Skywalker: Love won't save you, Padme. Only my new powers can do that!
Padmé: But at what cost? You're a good person, don't do this!
Anakin Skywalker: I won't lose you the way I lost my mother. I am becoming more powerful than any Jedi has ever dreamed of, and I'm doing it for you. To protect you.
Padmé: Come away with me. Help me raise our child far away. Leave everything else behind while we still can!
Anakin Skywalker: No. Don't you see? We don't have to run away anymore! We no longer have to hide our love for each other. I am more powerful than the Chancellor, I... I can overthrow him! And together, you and I can rule the galaxy! We can make things the way we want them to be!
Padmé: I don't believe what I'm hearing! Obi-Wan was right... you've changed! You have turned to the dark side! You're not Anakin anymore!
Does Padme know the name Darth Vader? In "Revenge of the Sith," Padme knows that Anakin has fallen to the Dark Side (she must know from his choking her). But does she know that Anakin is Darth Vader? I.e. was she aware of the name "Darth Vader"?