The Other Mrs.

Officer Berg sends another officer to the house to get the washcloth and the knife. Sadie shares her theory that the murderer is either her niece or her son, but it seems that Will has decided to throw Sadie under the bus. Will retracts his alibi for Sadie on the night of Morgan’s stabbing and also tells the police that Sadie is a jealous and insecure woman.

Berg shows Sadie the crime-scene photos and realizes that Morgan was the little sister of Will’s dead fiancée, Erin, but keeps that to herself. During her interview with the police, she transitions into Camille and introduces herself to Berg, telling him that Sadie had to leave.

Berg sends a psychiatrist to talk to Sadie, and her condition, DID, is made explicit to the reader. The psychiatrist tells Sadie she has met the other alternate personalities, or “alters”—Camille and a child—and that the child drew the violent images, not Otto. This psychiatrist not only is able to interact with the other alters but also obtained Sadie’s psychiatric files and fills Sadie in on her missing childhood memories involving her stepmother.

The police are unable to locate the washcloth or the knife, but Will allows them to search Sadie’s belongings.