The concept of feminism in 1965 was a married women and a staying at home mom. There to take care of her husband and children, and a divorce is forbidden. Although Katherine lived in 1965, her idea of feminism is very modern, independent and successful women that does not need any man to take care of her.
The best part of the movie is when the old times idea of feminism and the modern idea of feminism collide if the storyline for Betty. That showed that even the most closed minded people can change