Shakespeare ignored parts of history to make it fit his themes. We see this most today on the Ides of March. We all know the line from Julius Caesar:
Caesar: Et tu, Brute! Then fall, Caesar.
However, historically, this is what really happened:
Caesar: Et tu, Brute!
Brutus: Ceasar, you don’t know shit!
He just changed it to fit the mood of his play. You can’t rely on Shakespeare for anything.
(Note, only fans of Bound may get this joke.)