This doesn't get more classic hero's journey. A dead guy shows up and invites you to save the world. To be the mother of the Daughter of God. Because you can't be God yourself, you silly sleeper, you've got to be all indirect and give birth to God, like that makes any sense. Anyway, OF COURSE she's going to say yes to that. She's champing at the bit, but for the sake of appearances she's got to seem to need convincing.
invitations and objections
Doesn't look like she has a choice. Doesn't look like she wants a choice. This acceptance of challenge is on rails, forgone. Because she's crazy. Brave. Crazy brave.