Alright, I was watching the original scene with the Emperor from Empire Strikes Back. In it, there was something I noticed. Here's the dialogue between the emperor about Luke (here, I'm paraphrasing).

Emperor: "We have a new enemy. Luke Skywalker... he could destroy us."

Vader: "He's just a boy. Obi-Wan can no longer help him."

Emperor: "The son of Skywalker must not become a Jedi."

Listening to this, did Vader really knew he had kids? He doesn't sound surprise about Luke being his son. To me, it almost sounded like he could have known about it (or I'm just getting confused).

In the Prequels, Vader knew nothing and the dvd special editions added changes to fit that, but let's ignore that. Obviously, he wouldn't know about Leia, but what if he at least knew about Luke being born?

A year ago, I read this fan-made script for Episode III called the Republic Falls. Here, Padme has given birth to Luke and Leia and during the Empire's rise, the twins are separated. But during Anakin and Obi-Wan's final confrontation, Anakin manages to see Padme carrying a baby Luke. In most Prequel Rewrites I've read, Anakin has never known about the birth of his children.

I'm not sure what to say about this one. Part of me wants Anakin to know Padme having Luke, but another part wants Anakin to not even know Padme was pregnant. What do you think?