At this scale
Furniture comes to the ankle or the shin. A bed is a low platform. A chair is a stool.
Their breath moves the curtains. Standing up means ducking for the lamp.
The room still contains them — just. Turning around means watching the walls slide past their hips.
Fills the room. Furniture is ankle-high. Fuyume beside Housecat. Warm, breathing furniture that decides whether you may stay. Exact scale: 12 meters. Fuyume is 155cm at normal height.
Smell: Vanilla
First thing they see
Cysh gasping at her.
How they were grown
smug Cysh is flaunting how much bigger her chest is, until Fuyume grows until filling the room, trapping the short Cysh with her before grasping her, pressing her against her chest, lick her and press her between her legs
How large
Fuyume is so tall that her feet touch the other end of the room, her back against the ceiling despite sitting down.
What happened next
Fuyume undress Cysh like a doll, playing with her little body.