When Lucifer decides he has no plan and no rules to follow, Crowley might be worried that Lucifer is going to come after him next. He doesn't look too pleased with his current conversation, so he hasn't found a way to take down the rogue villain.
Castiel: It's very complex. If the pizza man truly loves this babysitter, why does he keep slapping her rear? Perhaps she has done something wrong. Dean: Are you watching porn? Why? Castiel: It was there. Dean: You don't watch porn in a room full of dudes. And you don't talk about it. Just turn it off. Well now he's got a boner.