What about this - NC called her real estate agent on Thursday 7/10 and said she needed to find a place ASAP. Why did JA go to her house to help her "organize" the next morning? She wasn't going there to organize to move her out, she specifically said she was *unpacking*.
Secondly, JA said they were to paint on Saturday with the leftover paint from the other work. Isn't it odd they would have an entire room's worth of paint leftover to do that?
What was the trigger? JA was already scheduled to come over, IIRC. Perhaps Nancy was told to just go on like normal and not let anyone know? Perhaps she was working on an "escape" plan? Perhaps Nancy needed a few more days to get money together to leave? Perhaps Brad intercepted email(s) confirming as much and thus was losing control? Perhaps that email that set him off was from Brett?