Widow goes abroad to get drunk & forget. One friend tries to save her, another does the opposite and the widow descends to whoring and gets murdered.
Hints if needed.
There are two versions of this film. Made 38 years apart.
Based on a good selling book at the time.
The widow isn't the MC, one of the friends is.
The original book's author is actually a character in the film. Not played by the author though. (In the first film anyway). The author is not the MC.
The first film was made in the 1940s.
The MC is invested with Uncle Sam.