This is why you don't tell loved ones certain confidential things. The average person does not have the ability to critically think, and are too saturated in certain beliefs. Panic will ensue with most, which will lead to desperate actions. Kim's move was over the top, and even she should have known better since she is a lawyer. She exposed herself, and Saul exposed her to Mike. So now you got individuals on both sides of the cartel who know who Kim is. ...Saul didn't have to make the money run, but greed got a hold of him. He would have made good money by just representing Lalo in court. What man would allow his woman or wife to know about or be associated with the dangers of his business?

Mike: "You told your girlfriend? She's involved now"

This is why Chuck was never going to let Jimmy be a part of the firm. Chuck knew what most people don't know, including Kim, that Jimmy will always be an opportunist at all cost, and he will risk his life as well as the lives of others, no matter if the opportunity is small or big. To Jimmy, the law is simply a tool no different than a pair of vice grips, to Chuck, the Law was a holy grail that should always be protected..... This is like Breaking Bad, where as the series goes on you start to hate the main character more and more. With Jimmy, its about the greed of scoring. With Walt, it was about the greed of being recognized and seen above all. He messed up everything at the dinner table when he told Hank that the other chemist was simply a pawn, and that there had to be another brilliant mind behind it. He couldn't just let it go, same thing with Saul ....can't just let certain opportunities go.

Both men are paralyzed by greed.