Harry, however, is determined to marry Kay. Certain divorce would hurt and humiliate Pat too much, Harry decides to kill her by lacing her daily digestive aid with poison. He visits Kay, who unexpectedly ends their relationship. Harry departs, then returns to ask for all the correspondence he has sent her, only to discover Kay in the arms of Richard, who had secreted himself upstairs. Realization sets in, and Harry races home to stop his wife from taking her nightly dose of medication. When Harry returns home he finds his wife sleeping, thinking she consumed the poison Harry walks towards the bedroom window and opens it. He is startled by Pat waking up and saying, "You're home early, is everything all right honey." Harry looks out the window in his backyard and sees John O'Brien running away from the house while getting dressed. It was implied that at this moment Harry comes to know about Pat's infidelity. Harry never confronts her, maybe consumed by his own guilt.