The wink gives him some terrible ideas.

"I can't help it. I'm positively famished." He gives a considering look down at Crowley's lips again before concluding that, no, absolutely Crowley is right. If he stays here, he'll get carried away and then where will they be? The poor students have seen enough suggestion of Mr. Fell's lax morals tonight as it is. It would be best to adjourn and move to a more fitting setting, one less likely to be walked in upon by children.

Despite the comfortable level of familiarity between them, This is new, and Aziraphale spends a moment of awkward indecision figuring out how best to separate and yet not to head up to his room. He slides to Crowley's side and lets the demon's arm stay at his waist. How very modern; his sensibilities argue that at best he should be holding Crowley's arm or his hand or perhaps even be a decent distance from him--but here they are tucked side-by-side like he's seen lovers strolling together in the quiet late night fog.

"But alright, you wicked old charmer, I suppose I'll let you have your way."