Kristen Stewart is gonna look to the books for "Breaking Dawn"

"Kristen Stewart turns into a vampire in the final installment of the saga — Breaking Dawn! But Kristen not only has to get used to being a bloodsucker, she has to play the role of mommy to a half-vampire daughter! “Luckily, it’s written very well and from her [Bella's] perspective once the kid comes,” Kristen, 20, tells VH1. “So, there’s really no way to prepare for that to be honest…I’m just really lucky that it’s written so well. I think I have everything I need.”

Kristen’s character has to deal with a totally different kind of child — a fast-growing one with fangs named Renesmee! “It’s very unique, it’s not the most normal story,” Kristen explains. “So I think I’m just gonna look to the books.”
Kristen Stewart attends "Welcome to the Rileys" Screening at Cinema Society Host on 18th October 2010
Kristen Stewart and Robert Pattinson in Eclipse Movie Companion Illustrated (2010)

Kristen has yet to come face-to-face with her on screen daughter, but she is excited to meet the girl, who director Bill Condon says could truly pass as the spawn of KStew and her real-life beau Robert Pattinson. “He was like, ‘Wait until you see this kid. If you and Rob had a kid, this would be it,’ ” Kristen says to MTV. “I was like, ‘That’s so weird.’ She just looks like — she sort of looks like Bella. Which is absolutely right.” Source: www.hollybaby.com