How about this as a scenario: After sustaining injuries in a triumphant mission, Anakin whose ear is held by Palpatine, feels slighted that Obi-Wan gets all the credit. Anakin goes home to recuperate. He is joined by Padme. Obi-Wan comes to check up on him and see if the emerging rift between the two can be resolved. Obi-Wan sees Anakin and Padme together. he confronts Anakin about this saying he will have to report him to the Council. Anakin blows his top accuses Obi-Wan of plotting to hold him back, tempers flare and the duel in which Anakin sustains his massive injuries commences. Padme tries to reason with Anakin but is rebuffed. Padme, horrified by the emerging Dark side of Anakin flees the scene. Obi-Wan leaves overcome by remorse thinking he has killed Anakin. However Palpatine's agents have been monitoring Anakin and they rescue and rebuild him. Darth vader is born.