Cara had been on this island long enough to figure out what was coming this weekend (even if she was in denial about it), and as such she being incredibly mature and not leaving her apartment. She wasn't even going to leave her room if she could help it.

Though in a fit of contrariness, she'd locked the balcony door while leaving the front door unlocked. That should show certain people who she definitely wasn't thinking about as she pulled her blankets over her head.

See? Completely mature.

[For those who have a reason to be there.]