The Cullen family, the volturi and Jacob black know that Bella is a vampire.
Bella tells Edward she knows he's a vampire in the meadow scene in the movie, while they are discussing his supernatural abilities and urges.
He does not know about vampires, but he knows Jacob is a werewolf.
Bella's unexpected visitor is Jacob. his father sent him because he knows edward is a vampire.
In new moon, Aro lets Bella go because she has promised to become a vampire. Aro then sees Alice's vision of Bella as a vampire so he knows it will happen.
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Edward and Bella's Daughter is both Human and vampire ,no its not edward bit Bella so Bella is a vampire then they had a baby and the baby is a vampire because both edward and Bella are vampire parents!
im not sure... it's nver clearly stated, but he knows SOMETHING is goin on. he knows Jake is a werewolf at least, and he hugs Bella and stuff when she's a vampire.... you DO know she turns into a vampire rite?
Bella is dieing because she is pregnant with a baby vampire. When the baby is being born it is completely killing her. Edward knows the only way to save her is to turn her into a vampire, because vampires very rarely die. So Edward bites her, and she becomes a vampire.
In Breaking Dawn, Edward turns Bella into a vampire.
Rosalie tells her about her life beforeshe turned into a vampire.... in order to convince Bella she should not turn into a vampire by choice. She talks about how beatiful she was. How her life was her father and mother. But most importantly she tells her about her fiancee well former fiancee and how he hurt her and left her on the street to die. Then Carlisle found her and turned her into a vampire.
She knows to much and must either die or become an immortal, a vampire.
No, they don't. Because Bella need to protect them from the Volturi, so they must not know Bella is a vampire.