The Ending

*** WARNING - SPOILERS **

Overall, I liked this movie, but was a bit confused about the ending. I don't really understand why Arthur Kipps and his son had to die at the end of the movie. After all, Arthur did retrieve the little boy's body from the bog and placed it in the coffin with his mother. Why would the woman in black then cause Arthur and his son's death at the train station? The only reasonable conclusion I can draw is that she was enacting a "mercy killing." Arthur was deeply depressed since his wife's death, and I can only assume that he was most likely going to get fired when he returned to work. After all, he didn't finish the job that he was sent to do, and his boss did give him a final warning. Although the ending was tragic, I think the woman in black was simply trying to do Arthur and his son a favor by reuniting them with Mrs. Kipps. On the other hand, the final scene shows a malevolent shot of the woman in black's face, and there is scary, foreboding music. Are we to assume that she is going to keep on killing, even after she got her son back? Anyway, this was the only part of the movie that I was conflicted about. I'd be interested to read what others think about the ending.