After their last heated argument, Crowley has been sleeping for a while. He pops back in, unexpectedly, to check on Aziraphale, only to find that the angel has lately been enjoying life... and frequenting a discrete gentleman's club. Something new and positively earth-shattering has been happening, and Aziraphale had been swept up in it. Has Crowley ever heard of the Gavotte!?
Crowley isn't used to being jealous of humans.