She has a fully loyalty meter on the status readout during the episode.
The OP contains tons of hints as to her joining Britannia. Further, Lelouch has been unable to come and save her like he promised, and she'll probably get angry at him for not coming for her fast enough. She also might learn about what happened with Euphie.
GODDAMIT SUNRISE! DON'T GIVE US THIS BULLSHIT TEASING AT THE BEGINNING OF THE SEASON AND THEN PULL THIS CRAP ON IS!