The demon actually addresses the person who picks up as "Phil". "Hi, Phil, can I talk to Renée? Do I? Huh. Anyway, is she home? It's urgent." And then he says, "Hi Mom."

Renée actually talks loud enough that Max can hear her if he tries. "I - excuse me?"

"This isn't a prank, swear to God, I just called Charlie, too, check with him if you want. Listen, this is such a long, long story but in case something happens - do you have a pen and paper?"

"...I do."

The demon gives her the same instructions about summoning him that he gave to Charlie. "I'm going to find out where I am, I have actually no idea, and see if it's faster to fly to your place or Charlie's, okay? And if I don't show up and I'm not at Charlie's you finish that circle. I'm so sorry about everything, I'm sorry I didn't explain -"

"It's okay, sweetheart - but I don't understand -"

"It's - complicated, but long story short I died and went to Hell but it's okay it's nice there I'm fine I swear and now you know how to get ahold of me if I get sent back before I intend to."

"I - I should call Charlie."

"Yeah, do. And apologize to Phil for me? Thanks."

And thus ends the call to the demon's mom.