Alice had been brought in to live with you after being found by some worker drones outside Cabin Fever Labs.

Apparently she was unconscious, but when reawakened, she was clearly not okay: and ran away into a separate part of the bunker.

She's now hiding with you in your home, well, at least she thinks she is, everyone but her in the colony knows she's there in your home

She's staring at the ceiling on the sofa.