Comment on the end

The Second Mrs. Tanqueray ends with the death of Paula Tanqueray, second wife to Aubrey Tanqueray. What's interesting about this ending is that it has brought up various interpretations regarding the author's intent. Was it meant to be the natural progression of events? Or was the author not willing to delve into the psychological implications of the story events that would lead to a reasonable conclusion?
I believe that while this ending felt a little contrived, it was clear that Paula became bored of her marriage to Aubrey and the new life that he has provided for her. While Aubrey was committed to loving Paula despite social classes, Paula still felt like an outsider and the circumstances surrounding her transition only heightened that sense of perpetual loneliness. I would have picked a less drastic way of concluding her character arc, but I'm not entirely surprised by the outcome.