I loved the bridge scene. I think it gave the hints that Jo was talking about but I don't think it was hinting that Remus was in love with Lily. Look at how Remus was describing Lily and then look at Hermione's reaction to him and others during the movie. Hermione rushes to Hagrid and tells him to get Malfoy to the hospital wing when he is hurt by Buckbeak even though Malfoy is awful to her. When she thinks Buckbeak has been killed she cries. She defends Crookshanks even though at first (when reading the book) everyone thinks the cat did it even Harry. In the movie when Reums turns into the werewolf instead of running from him at first she tries to help him. She puts others wellbeing before her own. Hence I think Hermione is Harry's twin sister and after Voldemort killed Lily and James she was adopted by the Grangers. I don't think Voldemort knew about her and since the prophecy was not about her they didn't feel she would need blood protection like Harry. Plus look at their names Harry/Hermione both begin with H like is common that the first letter of the twin's names are usually the same. Hermione wound up with James' unruly hair and his eyes and Lily's brains and heart. JUST A THEORY