I have a feeling that PF's plan was for KK to drive KB's truck toward KB's grandmother's, probably with the body. I think KK knew this and borrowed her friend's car so hers wouldn't be seen in WP, Florissant, etc. KK was probably working on TG and maybe the day after. KK may have just balked at going to "clean up the mess" but she probably knows that beating KB to death with a bat was not going to look like a gunshot or a car going off the road. It was going to look really suspicious if they found KB's body with a bullet in the head AFTER being beaten to death. She probably told PF in that phone call on TG that it would never fly and that she wasn't about to drive KB's body to Idaho, but they could make it look like she had just disappeared. If she drove to Idaho with KB's body and vehicle, she had to get back to pick up her friend's car, but PF wanted to make sure he was seen in and around WP after KB disappeared. Maybe KK was supposed to bring her aunt or one of those friends to drive back the car she drove to WP. It might have been KK's idea for PF to call/text KB's phone to make it look like she was still alive, but he's too stupid to figure out that LE could tell where the phones were physically located. By the time LE started looking for her, PF had screwed up the lies he was supposed to tell. Before the murder, PF was making the plans and after the murder, KK took over. That's why the plans changed. MOO.