I saw this on TV in the sixties, it was from the 1940’s or 1950’s never saw it again.
The teenage girl was psychologically tortured by her mother because she had six fingers and the mother told her if anyone would find out she would be an outcast, made her wear a glove or two gloves, can’t remember. The mother wanted girl to stay away from other kids, especially boys and stay with her, be like her.. frightening her into hiding her “defect” and warning her what would happen if others found out. Also remember mother was a sort of paranoid elitist, who thought was better than other women.. etc etc.. the film kind of affected me and I would like to see it again to see what really happened. It must be from 1940-1955. Real social paranoia about being different.