Stated she was like mother to the other girls and did not run away with them due to her ethnicity potentially giving them away in a Middle Eastern area.
Sounds like she was a very strong person,to bad she had to go through this and die in such a horrible manner.
She should have taken her chances. What is the point in remaining in ISIS captivity, only to be killed by the Islamist thugs later? Even if it was just a 10% chance, she should have taken it. Perhaps she was hoping for a hostage exchange (al Baghdadi had promised to free her, if Afafia Siddiqui was released from the US custody).