There are still a few things about KK's story that just don't add up.
1. she's a nurse and would have needed to apply for that time off during the Thanksgiving day week far in advance. For her to claim he called her out of the blue and told her she needed to clean up the mess doesn't add up. He must have known she had that time off and she must have put in a request to get those days off. Her job is not the kind you can just take time off whenever you feel like it, especially on holidays.
2. KK claims that PF contracted for her to kill KB because she had access to drugs like ambien, etc. Thing is, PF's mother still holds her nursing license and would have been able to get the meds and he wouldn't have had to go outside the family to get the help he claimed he needed. Additionally, it would have been much easier for him to use whatever he had on hand as a farrier.
3. KK claims that she did attempt to carry out the poisoning by giving KB a coffee laced with poison, but couldn't do it. However, the two weren't friends and it makes no sense that KB would accept a coffee from a complete stranger. If some woman knocked on your door and introduced herself as a new neighbor, had a starbucks coffee with her and offered it to you, would you take it? I know I wouldn't. I'm sure they must have met before, seeing as KK and PF were carrying on an affair for months KK must have travelled to see him. During those travels doesn't it make sense that KK was working to gain KB's trust by befriending her? I mean how was KK planning to bludgeon KB to death, knock on her door carrying a metal pipe, smile and say "hey I know you don't know me and I'm carrying this metal pipe, but can I come in and be your new friend"?
4. KK cleaned up KB's home. Trust me, if someone asked me to clean up the home of some stranger I had never met I'd be hard pressed to make that home look like nothing had happened. KK said that home scene was brutal, yet she knew enough about the layout of that home to make it appear to KB's family that the home was normal. Furniture was where it was supposed to be, knicknacks where they should be, pictures on the walls, chairs, plants, etc. How would KK know what goes where if she hadn't been in that home before?
I think there's more to the story than we're hearing or KK is still lying because there are things that still don't add up.