From your link
Kelsey Berreth murder conspiracy fueled by affair between Patrick Frazee, Idaho nurse, documents say
In fact, Lee drove to G's house in Idaho to pick up G's 2012 black Volkswagen Jetta and then drove to Colorado to sanitize the Berreth's home after Frazee allegedly pummeled his fiance to death with a baseball bat in her living room. When investigators interviewed MG, she acknowledged that Lee's explanation of going to her house was an alibi in case her husbnad called to see where she was, the document said.
When police interviewed Lee about her trip to Colorado on Dec. 14, Lee again lied to her husband, telling him she had actually gone to Colorado around Thanksgiving to see a horse she and Frazee owned together, the document said. She told her husband she thought "someone set her up," the document said.
When investigators interviewed CL, he divulged that his wife and Frazee had dated in college and that they were involved in a sexual relationship during at least 2016 and possibly 2017, the record said.
"CL did not want any of the details of the affair, and did not have further information regarding their relationship to provide," the document said.
*removed names*, replaced with initials