In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Q: Sentence1: Isabel loved her father, even after he divorced her mother. Sentence2: Then Isabel's father started dating a younger woman Isabel's age. Sentence3: Isabel tolerated this, but she wasn't happy about the situation. Sentence4: Then Isabel's father decided to marry the younger woman. Sentence5: This was the final straw, and Isabel no longer talks to her father.
A:
Isabel, Isabel's father, Her mother, Younger woman