Odelya Halevi as Willow, an Instagram model working with Mischa and friend of Jade.Christina Anthony as Velma, Taylor's sister.Saidha Arrika Ekulona as Taylor's sister.Kevin McNamara as Duke, Jade's ex-boyfriend.Reid Scott as Eli Cohen, a screenwriter in an open marriage with Taylor.Alexandra Daddario as Jade, the bisexual mistress of Taylor.Kendall Denise Clark as a young Taylor Harding.Kirby Howell-Baptiste as Taylor Harding, a bisexual, feminist attorney in an open marriage with Eli.Hayley Hasselhoff as Patty Jenkins, Brad's lesbian sister.Robert Craighead as Dwight Jenkins, Brad's father.Dale Dickey as Ruby Jenkins, Brad's mother.Philip Anthony-Rodriguez as Hector, Simone's former hairdresser and Karl's lover.Christine Estabrook as Joyce Dubner, a hypochondriac neighbor of Simone.Ken Garito as the police officer who mistakes Simone for a prostitute.Charlie DePew as Brad Jenkins, Amy's fiancé.Li Jun Li as Amy Lin, Simone's daughter from her first marriage.Leo Howard as Tommy Harte, Naomi's son who harbors romantic feelings for Simone.Katie Finneran as Naomi Harte, a wealthy friend of Simone and Tommy's widowed mother.Jack Davenport as Karl Grove, Simone's third husband who is using their relationship to conceal his homosexuality.Lucy Liu as Simone Grove, a twice-divorced socialite married to Karl.Catherine Curry as Elsie Warner, April and Rob's daughter who is under the care of Beth Ann.Ava Scarola as Emily Stanton, Rob and Beth Ann's deceased daughter.Scott Porter as Ralph Vlasin, Rob and Beth Ann's neighbor and Mary's abusive husband.Lio Tipton as Mary Vlasin, Rob and Beth Ann's neighbor and Ralph's abused wife.Peri Gilpin as Vivian Burke, Hal's wife.Spencer Garrett as Hal Burke, Rob's boss.Lindsey Kraft as Claire, Rob's secretary.Adam Ferrara as Leo Mosconi, Rob and Beth Ann's neighbor and Sheila's husband.Alicia Coppola as Sheila Mosconi, Rob and Beth Ann's neighbor and Leo's wife who befriends Beth Ann.Sadie Calvano as April Warner, a waitress having an affair with Rob.Sam Jaeger as Rob Stanton, an aerospace engineer married to Beth Ann.Ginnifer Goodwin as Beth Ann Stanton, Rob's subservient wife.The infidelity in each marriage sets off a chain of events that ends with a death caused by a woman. Beth Ann Stanton remains content as a housewife in 1963 until she learns of her husband Rob's unfaithfulness socialite Simone Grove discovers her third husband Karl's homosexuality and begins her own affair with a younger man in 1984 and in 2019, bisexual attorney Taylor Harding finds her open marriage tested when she and her husband Eli become attracted to the same woman, Jade. The first season of Why Women Kill follows three women from different decades who are connected through having all lived in the same Pasadena mansion and experiencing infidelity in their marriages. 6 Why Women Kill: Truth, Lies and Labels.