When Men Betray (1918)

Despite the pleading of his wife Marion and his little daughter Vivian, Raymond Edwardes intensifies his affair with a charming adventuress named Lucille Stanton. Marion attends a reception with Frederick Barton one evening, leaving Raymond free to visit Lucille and leaving Raymond's younger sister Alice alone in the house. Bob Gardner, who is engaged to Raymond's elder sister Florence, rapes Alice, and that same evening, Raymond finds Frederick in Lucille's room. Realizing the great pain he has caused his wife, Raymond asks for Marion's forgiveness. Bob is killed in a fight with Frederick, whereupon his brother, Dick Gardner, offers to marry Alice to atone for Bob's wrong.