Photo: Shanann Watts /Facebook

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Investigators have redacted several lines of the affidavit in the paragraph pertaining to the alleged affair. The co-worker has not yet been identified.

Chris’ marital impropriety was one of many blockbusters in the affidavit, which was released on Monday. He also allegedly admitted he killed Shanann — but only after, he claimed, he“went into a rage”when she strangled one of their daughters.

Her body and the bodies of her girlswere found on Thursday.

In the intervening days, as investigators worked on what appeared to be a missing persons case, Chris initially said that he had talked to Shanann on Monday after waking up about 5 a.m., after she got home from her work trip just before 2 a.m., and he told her he wanted to separate, the arrest affidavit alleges.

Shan’ann Watts (right) and her daughters.Shanann Watts /Facebook

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Chris said that while he and Shanann “were emotional,” the conversation was “civil,” according to the affidavit.

Speaking with authorities later, Chris again said that he saw Shanann on Monday — this time around 4 a.m. — and “informed her he wanted to go through with a separation and they were both upset and crying,” police said in the arrest affidavit.

Chris claimed Shanann “told him she was going to a friend’s house that day.”

Finally, in another police interview, after law enforcement allegedly uncovered the affair and after he asked to speak with his father, Chris said he would “tell the truth.”

Chris Watts.Joshua Polson/AP/REX/Shutterstock

Christopher Watts court case, Greeley, Colorado, USA - 16 Aug 2018

At that point, Chris claimed, he “went into a rage and ultimately strangled Shanann to death” before loading “all three bodies onto the back seat of his work truck,” according to the affidavit.

He is next set to return to court on Tuesday. He has not entered a plea and his public defender has not responded to PEOPLE’s multiple requests for comment.

“It’s really sad. It’s beyond belief, really,” a friend of the couple, Kris Landon, tells PEOPLE. “And it makes you wonder about other people you know. If this couple who seemed so perfect was like this, what are the other couples like?”

source: people.com