The Island
You let her stay silent, she's got something on her mind and it will surface eventually. You turn the conversation to being rescued, discussing possible methods of being noticed by any passing planes or boats. The fire starts dying out and your realize you don't know where you'll be sleeping. You could ask them to share their tent with you, however that would be rather small sleeping quarters, or you could sleep out under the stars which is apparently how Lydia has slept the past two nights.