Constance Langdon

Constance Langdon is the secondary antagonist in American Horror Story: Murder House, the first season of American Horror Story, and a minor character in the series' eighth season, American Horror Story: Apocalypse. She is the mother of Beau, Tate, Adaline and Rose (unnamed until the eighth season), and is the grandmother/adoptive mother of the Anti-Christ, Michael Langdon. She is portrayed by Jessica Lange.

Role
Constance seemed to be gentle and good-natured, but in reality was really cunning and rude, showing no qualm in killing her husband and her maid, Moira, when she found them committing adultery behind her back.

In spite of her harsh behavior, Constance cared very much for her children, even though she frequently resorted to cruel parenting. Even so, she broke down in tears when she lost Adaline, her remaining living child, and committed suicide when she discovered how irredeemable and murderous Michael was. Her role and personality is likely a reference to Minnie Castevet from Rosemary's Baby.

In the new timeline created by Mallory in an attempt to stop the Anti-Christ, Constance abandoned Michael before he was killed by Mallory running over him with car in the same manner when Adaline was killed by a mysterious driver. Rejecting Michael's pleadge to save him, Constance left him to die. In this timeline, Constance didn't commit suicide.

LOTM: Witnesses of Sleepy Hollow
Constance existed in this storyline and Michael in this version mentioned that he drove her into suicide intentionally.