This article contains spoilers from the 2017 series of Twin Peaks. If you are not up-to-date with the aforementioned television program, it is strongly recommended that you do not read this article.
Phyllis Hastings is the wife of William Hastings.
Detective Dave Macklay came to Phyllis' home to arrest her husband in relation to the murder of Ruth Davenport, then later returned with a search warrant. For some time prior to his arrest, she was having an affair with Bill's lawyer, George Bautzer.
After Bill could not be released on bail, she was allowed to briefly see her husband in his jail cell. He insisted that he was never in Ruth's apartment, but dreamt it. She then accused him of having an affair with Ruth, which was followed by him stating his awareness of her affair with George. She taunted him with "life in prison," and was dismissed. She informed George that Bill was made aware of the affair, but requested him not to leave with her, though they did plan on meeting at her house later on.