Leia never knew who her birth mother was until after Jedi. She had always assumed that Breha Organa was her birth mother as her adoption was kept a secret to avoid her being discovered by the emperor. Leia does not really remember much of Breha Organa because she died when Leia was young and she was raised by Bail Organa's three sisters.And to sum up the argument about episodes 1, 2, and 3...
They are all a HUGE waste of time. 3 was pretty good...but a waste of time. Episode 2 should have been episode 3...ending with the birth of uniformed Vader. Episode 3 should have been Vader and the Empire just destroying and wiping out all of the Jedi.
Instead he wasted so much time on pod racing, and rolling around in fields on Naboo that he only had 2 minutes to kill ALL of the Jedi.
Then Luke in RotJ asks his sister what she remembers about her mother and she goes into this she was very pretty, very sad memory...DUDE SHE DIED 2 MINS AFTER YOU WERE BORN!!! Did he FORGET that part?
The movies 1, 2, and 3 are really not THAT bad...It is just for what they were supposed to be and the stories they were supposed to tell...it was just a mess, a bunch of lies, and a huge waste of time.
I have never understood why so many people have such a hard time with this. Luke had no clue who is mother was or what happened to her. It is perfectly logical that he thought that Leia's mom might also be his.