The portal system is replaced with a more secure successor over time. Inferno's subworlds are still non-urgent, but the daeva do get a portal to Limbo, where the humans present are much less likely to be able to freak out and successfully move from freaking out to doing anything along the lines of "nuke the rogue daeva and hope the summoner's within the blast radius". Cam visits his dad and gets a letter to his mom asking that she show up at his dad's house. He makes useful things in ways that won't be too traceable (if his dad's fridge has slightly more bacon and cheese and apples to share with the neighbors a few days in a row, who'll notice?), as a short-term intervention while awaiting more acculturation to the way Limbo works so they won't upset any very delicate balances. The portals to the other worlds can wait until there are actual plans on what to do with them. And possibly until their alts have more free time to help. In the meantime, Cam has his parents again.
"Yup. We can't upset the delicate balance between the only two gods that we actually know."
"It's an excellent shortcut, absolutely. If it comes down to it I could encase populated Limbo in a gigantic dome or several so it could self-contain a water cycle and then it wouldn't need much added maintenance. There could be little external gravitic supports. But for today - you want to meet my dad?"
And so they go through the portal into Charlie's Limbo house. Charlie is in it. There is a football game of some kind playing on the TV in the background and eggs frying on the stove. Cam gets a hug as soon as he's stepped into the kitchen. "Dad," he says, "this is Adana, my girlfriend. Adana, this is my dad Charlie."
"I have got the hang of eggs since last time you saw me cooking anything, Cam. But thanks."
Adana raises an eyebrow. "Is... I feel like there's a story there, do I want to know...?"
"It was pretty awful when I was alive, but apparently there's been improvement since. At least in eggs. Those look edible."
"... Good point, my boyfriend dying is sort of vaguely upsetting. But you're definitely still alive."
"You realize that by that logic literally no one from our world is dead. And this before we even start intervening. Kind of stretches the word 'dead'."
"Other people are allowed to have died. I don't like it, but it's within their basic human rights. You're not, you have to not ever die. So declares your girlfriend. Who also died."
"The sort of pidgin spoken in this part of Limbo has different words for 'dead' like an animal and 'dead' like a Limboite," comments Charlie. "Think it's Chinese for the first one and Portuguese for the second. Something like that, I don't pay much attention to etymology."
"Huh. Maybe we should use those, that's helpful. I know the angelic I picked up translated it to 'ascended' instead of dying."