Bell, Buck and Wendell (1958)
Emma Buck is just your average, modern-day mother possessed of a mental age of 8 with a record of prostitution and immorality. But one day a handsome Supreme Court Justice, Oliver Wendell Holmes, walks into her life and declares it is in the interest of the state to have her daughter Carrie forcibly sterilized.
Emma decides she wants him--especially when he declares: "Three generations of imbeciles are enough." She mistakes this for flirting. So, Emma casts a musky spell of love over Justice Holmes. She, in turn, falls in love with him but in doing so she loses her powers, and both she and her daughter are legally declared "feeble-minded" and "promiscuous."
In the end, Emma is rebuffed and her daughter Carrie forcibly sterilized. In a twist, it turns out that Carrie Buck was not "promiscuous" at all, but had actually been raped by the nephew of her adoptive mother.