A woman who claims to be Chris Watts' secret mistress has come forward with details of their affair, alleging Watts used explicit language and described his wife, Shanann, in derogatory terms.

In an interview with the Daily Mail, the woman, identified as Amanda McMahon, stated that she had a sexual relationship with Watts. She described Watts' alleged behavior as "vile" and "animal mode." McMahon also claimed to have explicit text messages exchanged with Watts, though these were not detailed in the report.

Watts, who pleaded guilty to the murders of his pregnant wife, Shanann, and their two young daughters, Bella and Celeste, in August 2018, is currently serving consecutive life sentences. The murders occurred in Frederick, Colorado.

McMahon alleges that Watts spoke obscenely about his wife, Shanann, during their affair. She stated that she has revealed information to the police that was not previously known. The interview provides a new perspective on Watts' life in the period leading up to the murders.