Jun In Hwa in Bread, Love and dreams (korean Drama)
here's the link to the drama info Bread, Love and dreams.
The actress plays as the step mother of the main character who doesn't want all the inheritance fall to the hands of her husband's son from his mistress.
Becoming evil by the situation, I can't help but amazed by her acting and her costumes in every episodes. the most fashionable woman among all the other characters.here are some of the examples. the photos are not mine though.