She'd had a bad night (another bad night) and eventually given up trying to sleep anymore and gone for a walk instead.
She was dressed far more casually than she had been the last time she'd met John - jeans and a soft pink sweater, hair loose round her shoulders - but she still raised very, very amused eyebrows at John walking barefoot and half-dressed through the lobby.
The automatic formal greeting died on her lips. "Hello, John," she said simply, instead, with a natural smile.