Act III, Scene IV: How has Beatrice changed in this scene from her previous behavior?

In this act, Beatrice will be tricked into loving Benedick by what she overhears in an orchard. This is not however just a trick. Hero and Margaret are merely playing on Beatrice's latent feelings of love for Benedick. Beatrice is no longer Benedick's enemy. She needs only an excuse to consider Benedick for marriage.