She goes up to where her computer is located in her room.
Bella does some cursory searching, and says, "Looks like we're good. We only live under permanent water, not above it. Wanna go install the lair now?"
"Sure, why the fuck not?"
"Righto." Bella turns invisible. "Don't want the neighbors to wonder how I'm, you know, walking. Also, this way I can fly there." Alice can hear her go down the stairs.
"Cool," he says cheerfully, meaning both okay and awesome. He trots down the stairs after her.
Partway down the stairs, Bella remembers flying. She's not used to having it yet. Off the stairs and into the air she goes. She puts on her coat; it disappears from sight as soon as she picks it up.
"Kinda weird," Alice comments, and then observes that he should probably get in the habit of not talking out loud to the invisible woman before they exit the house.
"Yes, probably," Bella agrees. "You wanna get the door?"
Bella flies out the door and up, up, up into the air. She can "hear" Alice from any distance; if she needs to talk to him to direct him towards the rock, she can always dip low.
Wheeeeeeee!
That makes him vaguely pleased, too.
(He wonders idly about hexing himself invisibility powers that make them both able to see each other when they are respectively invisible, and thinks happily of going flying with her, and entertains a brief and completely unrepentant daydream about invisible midair sex.)
"Bear left a bit," she says.
When he feels the sense of being read depart, he cracks up; when she directs him leftward, he obeys.
Bella offers no apology and does not caveat the obvious explanation. She just flies along, weaving between trees. She's a lot more graceful in the air, controlled by purely mental action, than she is when she has to act via her body.
He thinks of that after a bit—wondering whether the lack of tree-crashing noises is for that reason or because she's flying high enough to avoid hitting things.
"Up ahead," she says after a couple minutes. "It's an easy trip. Do you want me to wish it for you?"
"Yeah, you're the one who's good at details," he says. "How come you haven't hit any trees?"
Aaand - yes, a hex can apparently do the lair and the appliances and the stairs and the rock passage and the restricted access all in one go.
"Hexes are awesome," Bella enthuses. She flies off the rock and walks through its side.
"Ooh, lairy," he says approvingly.
Bella flies in a spiral rather than chance the stairs. The air glows, the layout's just like the one she drew, it has high vaulted ceilings and big open doors with rounded corners into the sewing room and the kitchen and more customary ones - albeit made out of rock, like everything else - for the bedroom and the bathroom. The appliances are sleekly white and silver, and they look like extremely iconic versions of their types, without brands or electrical cords or even a humming noise from the fridge. All the colors are as she wrote, and she sinks an inch into the rich red carpet when she lands at the foot of the stairs in the central room. Bella lifts back into the air just so she can twirl without falling over. "Here ya go," she says.
"I love yoooou," he announces, and hugs her.
And before the unspoken subsequent event, once Charlie gets home.
"Awesome," he says brightly, letting go and spinning around to survey the space. "Read me?"