Sarah was 30 years old and feeling sad. Her younger sister, Lily, was happily married and had two cute kids. "I wish I had my own family, too!" Sarah said to her friend, Mia. "It's not fair that Lily gets to be a mom before me!" They sat under the big tree, watching the children play, while Sarah felt a little jealous. But Mia smiled and said, "Don't worry, Sarah! Your time will come!"