Chapter 12. Intruder, page 258.
She find's out Jacob's secret when she confronts Paul and he turns to a werewolf. Jacob transforms to a werewolf when he senses Bella's in trouble and he goes to save her.
When he became a werewolf
When Jacob finds out he is a werewolf, we has to say away from Bella for a while, so Bella was hurt that she was all alone.
Whenever she slaps one of Jacob's friends and then Jacob's friend becomes a werewolf and is about to attack Bella but, Jacob comes and jumps over Bella and he becomes a werewolf whenever he jumps over Bella and then she sees him and she sees that he is a werewolf!!!!!!! =o]
Indirectly. Jacob deliberately phases to a werewolf in front of Charlie
New Moon
No, Bella Swan does not turn into a werewolf in New Moon.
Jacob tries to tell Bella in Chapter 12- Intruder; page 283- But due to an order given by Sam, he cannot. Bella has the dream that helps her figure it out on page 291 She eventually figures it out on page 293 She tells Jacob on page 305 Hope this helps!
In the book Bella describes him as a huge shaggy russet coloured wolf.
Jacob in twilight isn't actually a werewolf he is a shape shifter as he doesn't posses all of the features of a werewolf because a werewolf bites people to turn them into werewolfs (their real name is children of the moon).Whereas Jacob was born into what he is but his family have stuck to just changing into werewolfes.
YouTube?
No. Jacob is a werewolf