Can't it just be a rivalry between two top female actors? Why they gotta make it about a man. Anyway Kei will probably win her over just like with that monkey king director.
@denzith I think it boils down to more the movie really. Whatever movie that the director wants to make, it's got a lot of people interested and people are being drawn in. But Kei's role is probably a very specific one, of a specific age. This rivalry is more the older actress' jealously, because she probably knows just how talented the director is and wanted to do more films with him. But too much time has passed for that.