"In terms of what Kristen told me directly, it didn't happen on the first movie. Nothing crossed the line while on the first film," Hardwicke explains to Time magazine. She adds, "I think it took a long time for Kristen to realize, 'OK, I've got to give this a go and really try to be with this person.'"
Hardwicke recalls a moment where she warned Pattinson about a relationship. "After I cast him, I told Rob, don't even think about having a romance with her... She's under 18. You will be arrested." The film finished shooting shortly after Stewart's 18th birthday.