Rent Married Life (2008)

Intense, fraught and simmering with passion, Married Life is the tale of Harry (Chris Cooper), a man whose faithful but emotionally-cold wife (Patricia Clarkson) has become all-but-impossible to love. Smitten by the young & beautiful Kay (Rachel McAdams), but terrified at the prospect of exposing his wife to the social humiliation of divorce, Harry opts to poison her so the marriage can end with his wife's pride still intact. Harry's scheme soon goes horribly awry, however, after he reveals the plan to his best friend, Richard (Pierce Brosnan). Richard too falls in love with Kay and sets in motion cunning plan all of his own...