I watched the movie a few years ago, when I was like 15/16 and my God it was great. Not sure about the historical accuracy but the movie was impressive and actors and actresses were great.
However, I read this blog where they talk about the movie. Then it hit me, the movie was also about extramarital affairs. I saw the things happening through the first wife, i forgot her name.
I realised how hard it would be for her to see her husband fall in love with another woman. I know it is a historical fiction set in a couple of centuries ago but it felt so wrong.
We always focused on the love and hardship the man and his lover went through. But we rarely see the efforts his wife made to make the relationship work. Yes, it is true that men some times ago are in polygamic relationship. I hope the comment/review help you see in a new perspective.