Sami is not and if Sami didn't get it in her head that she needed to save the Brady's Will would not have felt the need to shoot EJ. Sami chose to walk out on Will's family and in an act of desperation and rebellion he shot EJ. Perfectly understanable for a guy of his age who all he has ever wanted was a family with his parents and when he saw that was a no go got used to the family provided by Raf