Leave Her to Heaven (1945).
Frankly, worth watching just to stare at Gene Tierney's face. I think that it must have been fun for her to play this insanely jealous woman.
Parts of the movie are supposed to take place in Maine. It looks accurate (unlike many other movies that are supposed to take place here).
This 1946 Academy Award winner stars Gene Tierney as Ellen Berent, a woman who bedazzles writer Richard Harland (Cornel Wilde) when the two meet on a train. Their courtship is sweet and swift, leading to a hasty marriage, but sadness displaces the joy when a series of tragedies befalls the couple. Could these horrid events have anything to do with Ellen's burgeoning and all-consuming jealousy?
I had seen this image many times before (tumblr, obvs.) but I had no idea that she was - SPOILER - watching someone drown. I had just admired her glasses / lipstick.
See all the previous movie posts here.