Hades not actually keeping Sally immobilized or stuck in a room in the dark the whole time after he saved her, that was just a thing he did to freak Percy out, but like. She's just stuck in the underworld. And they hang out while waiting for Percy to show up and start throwing accusations and generally get along pretty well, when you ignore the Percy of it all, lol. Sally pitches in around the palace and finds she got paid for her work when she gets returned to the surface and there's a stupid amount of money in her bank account, before she turns Gabe into a statue and sells him.
Anyway cut to Percy coming home early from visiting Annabeth at New Rome one day and being surprised by his mom, uncle, aunt, and step-dad having tea and chatting casually about their lives.