What does Anne mean when she mentions that Peter has two anne's before him?

Anne came to see herself as "two Annes" - the outward one everyone saw: Boisterous, chatty, excitable, somewhat argumentative. The "other" Anne was quiet, reflective, and felt things very deeply. The "other" Anne was also very vulnerable - not in control of the situation, and that is why Anne feared the "other" Anne and let her come to the surface so rarely.