The issue is, PF TRIED to slam KB via his comments to others (CC, and who knows who else) that KB was in rehab twice, that she had an alcohol problem, and that she was fired from her job. Rehab, to most people, signifies drugs or alcohol, not depression help.
PF's intent, was to paint a picture that KB was a problem...she "disappeared", she drank too much, and implied that she lost her job as a result. Sociopath/narcs do this in order to make themselves look like the "good" one and their SO look like the "bad" one.
Since CC once owned a bar in Cripple Creek, I wonder more about his and PF's drinking habits that I do KB's.
For a variety of reasons, I believe KB was, as CC said in the Dateline interview, a good girl. I bet she rarely, if ever drank, was a solid employee and mother. And I bet PF wanted something different.
PF is the evil one. KK probably is too.