Good omens

So, good omens, our beloved and good heroes, Crowley and Aziraphale, are married. Demon and Angel, a beautiful union. They also have a son who left for Alpha Centauri for several years. Four years have passed since his departure. And then the bell rings in the bookstore, signaling a new customer. Aziraphale and Crowley turn around in unison and see someone they didn't expect to see.