Read the following context and answer the question.
Context: Claire 's about to have the baby , she needs the doctor now . But when Jin gets there , Jack 's tied up with Boone 's crushed leg and ca n't leave him . Kate , Charlie and Jin are going to have to deliver the baby . Jin 's and Sun 's eyes lock again for the first time since Sun revealed she spoke English . He had n't known how he would feel when he had to deal with her again . But this is not the time to think of that .
Question: What is causing Kate , Charlie and Jin 's anxiety ?
Answer:


Kate , Charlie and Jin have to oversee a birth .