Imagine the horror if Edward were to come across Bella for the first time whilst she was bleeding to death in his meadow? He and the rest of the Cullens have some tough choices to make about the girl who now has no one in the world to take care of her; aside from seven vampires.
He had three choices . . .
1. Leave her there to die
2. Kill her himself
3. Take her home to a house full of vampires