"She knows, she is in the game now."
Of all the times he had kept things away from her, he just had to choose the worst possible time to tell her something. Getting Kim involved in this shit is a huge L for Saul.
And for God's sake, Jimmy, listen to Mike for once. Man is a fucking walking crime encyclopedia. If you had asked his opinion before setting a trap for a speeding car in the middle of the desert, maybe, just maybe he would have told you it's a bad idea.