"I mean", Crowley said, pushing himself away from the pillar and slinking closer to Aziraphale. "We could...y'know. Pretend. To..." He made a gesture in the air that was somehow both completely vague and alarmingly crude. "With each other." Aziraphale's heart might just have stopped. "Think about it!" The demon stepped in front of him, shielding Aziraphale from the rest of the room as he leaned in. "We don't have to actually do anything", he said, voice lowered conspiratorially. "S'just gotta look like we are, yeah? No one's gonna suspect a thing. Just helping each other out to stay undercover." Yes. Right. Stay undercover. Aziraphale really needed to focus. ~oOo~ Or, the one where they participate in an orgy in Ancient Greece, because what else is there to do but fuck your supposed enemy in order to keep up covers?