Yokmangeui Bulkkot (TV series 2010-2011)

The story of a conglomerate family that falls apart when the members are caught up in a furious battle for succession. Kim Tae-jin's children all covet his fortune and the power that he possesses as the company president, and they would do anything, however cruel and inhumane, to wrest it from the others. At the forefront of this desperate game is Yoon Na-young, the ruthless and ambitious wife of Kim Young-min, Tae-jin's third son. Her unquenchable thirst for power and wealth drove her to the point of no return, manipulating both husband and son to achieve her own desires. - IMDb