This is a "Wild Mass Guess" entry, where we pull out all the sanity stops on theorizing. The regular entry on this topic is elsewhere. Please see this programme note.
The Twilight Chronicles
Starry is secretly manipulating everything behind the scenes.
Giving Jacob fake memories to manipulate Edward is just the tip of the iceberg. He's running the whole show, Bella and Edward are just pawns in a bigger game... his final objective remains to be seen.