The womanChris Wattswas seeing behind his wife’s back cringed while speaking to investigators about the time she spent with the confessed killer and sobbed thinking about the smothering deaths of his two daughters, Celeste and Bella, video and audio released last week reveals.

“Why? Why? Why? How?,” Nichol Kessinger wonders aloud, as detectives ask about her months-long relationship with Watts. During the police interview, Kessinger’s father was present.

“I don’t even understand how you can bring yourself to do that to someone,” the 30-year-old Kessinger says through tears.

Watts, 33,pleaded guilty earlier this monthto strangling his pregnant wife Shanann, 34, and smothering his girls, Bella, 4, and 3-year-old Celeste.

He was sentenced to three life termsin prison without the possibility of parole for his crimes. As part of his plea agreement, he avoided a possible death sentence.

Nichol Kessinger.RJ Sangosti/The Denver Post/Getty

Mistress of Chris Watts speaks out

Watts initially denied any involvement in his parents disappearance but was arrested on Aug. 15, a day before their bodies were found on a remote oil work site.

(Click herefor an upload of the audio fromThe Denver Post.)

• Want to keep up with the latest crime coverage?Click hereto get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter.

Later in the audio, Kessinger expresses her revulsion over Watts’ crimes, saying she’s “so ashamed of him.”

She continues: “Ugh, he is so disgusting.”

Chris Watts, at left, with Nicole Kessinger.Weld County District Attorney’s Office

cw1

Kessinger expresses horror that the man with whom she began a physical relationship in July was capable of such violence.

“Those poor babies,” she says, crying.

“Did you ever say anything about the kids being a problem? Anything about his wife being a problem?” one detective asks.

“Never! Never!,” she replies. “This shocked me just as much as I think it shocked the rest of the world.”

She also says in the audio a lot of people might blame her, believing she was the catalyst for the slayings, but she adds, “I legitimately think his cheese was sliding off his cracker long before he met me.”

source: people.com