The Infernal Serpent

"Oh? Children can come into our lives somewhat unexpectedly. I was a godfather of sorts to a child for a number of years, and currently serve as a a family friend to a few more. I would have thought even that nigh impossible a little over a decade ago."

Aziraphale raises his eyebrows. "For what, being a mathematician? If it helps any, you're keeping company with an angel, as well."