Such a mundane way of building tension. It's just furniture, but the effort that went into preparing it is on the level of building a shrine or a life-sized doll.
Honestly, I feel kinda bad for her. Like yeah, she's pretty crazy, but if he just showed her a bit of affection/affinity, she'd be a great friend/sidekick/backup, whatever. Plus she's pretty much just starved for intimacy, hardly a crazy thing.