Sara had a huge secret. She didn't want to tell anyone but she knew when she found the right one she would have to tell him.
Sara's secret is that she is that fallen commet. Her father is a constilation. Sara believes that there is a guy on Earth that has a good heart. She believes that it is Alex but she doesn't know for sure. Her Father doesnt believe it but has given her a year to find the right guy and prove him wrong.
She loves Alex and he loves her. Sara hopes that this is enough to prove to her father that there is good in man. But as she spends more time with him she understands that there is more to it then love, its how you show that love for them.