He feels an open summons and lets it grab him -
Books, guitars, a broken coffee table that he may safely assume was the victim of drunken shenanigans of some kind. Various empty bottles, together comprising an excellent education in local cheap alcohol.
Cam can't heal the table as seamlessly as an angel could, but with a firmly attached layer of intervening wood knitting the broken parts together he can do a passable job. It looks pretty much like a crappy apartment in the First World just before the turn of the millennium ought to look. Except for the booklist, maybe.
The booklist is a little weird. There are other books on magic, although none of them are about summoning demons in particular.
"Reading your books. Would you rather I do this without your supervision by making my own duplicate copies somewhere else? Because I can do that if you're going to be a pill about it."
"Oh, what's the worst that could happen?" chirps Rayne. Ripper gives him a dirty look.
"What is merely reading this book liable to do to me?" inquires Cam, pausing in doing so.
"I set Ripper's hair on fire once," chirps Rayne.
"You did that on purpose," snarls Ripper.
"Yeah, but I didn't have to do much more than read a book to do it."
"Fine," says Cam. He puts the book back, shrugging, and goes back to curiously tidying.
"Aww, but it would've been funny if he'd set his hair on fire," says Rayne.
Ripper makes an exasperated noise and flops over so his arms and head are in Rayne's lap.
"I'm relatively better equipped to handle being suddenly on fire than you are, presumably, but I don't think it qualifies as actually funny."
"It doesn't have to be funny to you," says Rayne. Ripper mumbles something unintelligible.
Cam gives up on talking to them. He does as much cleaning as he feels like and then makes an upholstery cover on their couch because he doesn't quite trust it and flops thereupon and makes himself rashers of bacon to nibble on, one at a time, and a stick-shaped computer with a futuristic screen projection to operate with the other hand.
Ripper, to all appearances, falls asleep in Rayne's lap. It doesn't look especially comfortable.
Cam takes notes, makes himself a key to their apartment and a leather coat and goes for a quick stroll around the block to check it out and lets himself back in, and then falls asleep on their newly covered couch under a conjured duvet.
The next morning, he is likely to be awakened by Ripper complaining loudly and unintelligibly about his headache. Rayne, less miserable or at least quieter about it, shuffles into the kitchen to make tea.
"Hey - is your name actually 'Ripper' or is that some in-joke I'm not in? - you want science fiction hangover drugs from a demon?"
"You want to swallow 'em and wait fifteen minutes or you want 'em intravenously via demonic magic and no wait?"