The story includes two adulterous affairs, but the only thing that is shown is a man and woman (each married to someone else) kissing farewell.
One man kills another in a duel, but all we hear is the gunshot off-screen.
The language gets no coarser than the occasional "hell" or "devil take them" when someone is quite upset.
All but one instance of drinking is social. The exception is when an alcoholic slips up and gets roaring drunk.