The present research seeks to critically study David Hare’s Knuckle (1974), Plenty (1978), and Skylight (1995) in light of Kate Millett’s feminist concepts in her book, Sexual Politics and Christine Delphy’s theories about family and patriarchy in her book, Close to Home: A Materialist Analysis of Women’s Oppression. Kate Millett in Sexual Politics believes that, there is a power-structured relationship whereby females are controlled by males in the context of sexual politics in society. Moreover, Christine Delphy believes that men and women as husband and wife perform the role of employer and employee at home which leads to oppressive measures. David Hare’s female characters in the plays above are explored through ideology, biology, sociological matters, force, class, and economy as sexual matters and the effect of these factors on them. More specifically, love, madness, and alienation are the consequences of these sexual matters related to Delphy’s theory which make a connection between sexual politics and the identity of female characters in selected plays. The thesis found out that sexual politics psychologically shape the lives of these characters as oppressed subjects in a capitalist patriarchal society.