Early in the film, Loretta Young's character refers to herself as "just a farmer's daughter." Fifteen years later, Miss Young won an Oscar for The Farmer's Daughter (1947).
When Marion finds Dixie's misplaced stockings, Dixie praises her by cheekily saying, "I need thee every hour." This is the title of a popular hymn written 60 years earlier.
They Call It Sin (1932) was based on the novel They Call It Sin by Alberta Stedman Eagan (New York, 1933).
Proof that it's Pre-Code: Marion discovers she's illegitimate as the result of an unwanted pregnancy; Marion forsakes the church when she leaves for New York; Dixie is seen in braless scanties as she searches for her stockings.