Catherine was in a tough spot, she had never encountered such a difficult situation or such a challenging choice since the day she was born. On one side was Vivian who treated her as a sister, on the other side was the relatively innocent Ava. Whichever side she chose, the other would sink into despair. For a moment, Catherine even felt some dizziness. She really wished she could just faint and escape far away from this scene where she had to make a decision.