Y'all keep saying that she should have taken her sister with her but she was just a teenager at the time. Diana was kind enough to take her in, she also helped her get where she's at.
She knew she had to make a change to get her sister back, and she did. It was just a process. But if she would have stayed then it's no telling where either one of them would be.
But I kind of get what y'all are saying too, sort of.