Better idea: Padme is married with some senator. Anakin is just a lover, his last name is never mentioned. Padme is pregnent and everybody, but Obi-wan, thinks that her husband is the father. Then, when Anakin turns to the Dark Side we could reuse some scenes from his Fighter to create a scene where he blasts some Republic ship (a lot of senators were there).
Everything makes sense. Everybody will think that Luke's father is dead and Anakin/Vader killed him.