Her Mistake (1918)

The heroine is a country girl who marries a city chap and finds herself neglected after the novelty of the honeymoon has worn off. Ralph Van Court is lost while hunting in the Adirondacks, and is found by Rose Hale. The young man had been in love with Viola Shepard, but discovered that she intended to marry his uncle, Stephen Van Court, for his money. After the two weddings, Ralph starts a flirtation with Viola, and spends most of his time away from home. When his son is about 5, Ralph's attentions to his uncle's wife become so marked that everyone is talking of the affair. The big situation comes when Viola meets Ralph at a roadhouse after consenting to run away with him. Stephen Van Court learns of the affair, and so does Rose. She reaches the private supper room before Stephen, and manages to make him believe that he has been misled about his wife's duplicity. Rose does this to shield her son's father, and Ralph is awakened to his wife's true worth.