Bad Sister is a 1931 American PreCode drama film directed by Hobart Henley. The screenplay by Edwin H. Knopf, Tom Reed, and Raymond L. Schrock is based on the 1913 novel The Flirt by Booth Tarkington, which previously was filmed in 1916 and 1922.
Naive Marianne Madison, bored with her routine life, falls for dashing con artist Valentine Corliss, who has come to her small town looking for fresh marks to swindle. He soon charms her into faking her wealthy and prominent fathers name on a letter of endorsement, which he presents to the other local merchants, who willingly give him merchandise. He prepares his escape, but not before conning Marianne into becoming his wife.Following their wedding night in a sleazy hotel, Valentine abandons Marianne. She returns home and begs forgiveness from her jilted fianc Dick Lindley, but having seen Marianne for who she really is, he turns his attention to her shy younger sister Laura. ........
Source: Wikipedia