At the end of Revenge Of The Sith, Leia was adopted by Bail Organa, following the death of her biological mother. At the end of Rogue One, Bail refers to Leia as being his daughter. During A New Hope, Leia is known as "Leia Organa, daughter of Bail Organa".
But did she know she was adopted by the Organa? Did she know that she's not the biological daugther of Bail Organa?
This could change the vision of the following scene: at the end of Return of the Jedi, Leia talks to Luke about her mother, and tells him that she was very beautiful... Did Leia talk about her birth mother? Or her adoptive mother?