The Little Foxes (1941)

The ruthless, moneyed Hubbard clan lives in, and poisons, their part of the deep South at the turn of the 20th century. Regina Giddons née Hubbard has her daughter under her thumb. Mrs. Giddons is estranged from her husband, who is convalescing in Baltimore and suffers from a terminal illness. But she needs him home, and will manipulate her daughter to help bring him back. She has a sneaky business deal that she's cooking up with her two elder brothers, Oscar and Ben. Oscar has a flighty, unhappy wife and a dishonest worm of a son. Will the daughter have to marry this contemptible cousin? Who will she grow up to be - her mother or her aunt? Or can she escape the fate of both?

Source: TMDb