A lengthy WaPo report, using mainly French sources, reveals how one woman decided to help the police end an active terrorist after the Paris attacks:https://www.washingtonpost.com/world/national-security/one-woman-helped-the-mastermind-of-the-paris-attacks-the-other-turned-him-in/2016/04/10/66bce472-fc47-11e5-9140-e61d062438bb_story.html?

His plans were derailed largely because of his decision to involve two women whose impulses when faced with the choice of trying to help him or stop him were immediately at odds.

The relationship between the two women in many ways reflects broader tensions in Muslim communities across Europe over interpretations of their religion, degrees of loyalty to their countries and the insidious appeal of the Islamic State.
The most important factor, her motivation, with my emphasis:
It’s important the world knows that I am Muslim myself...It’s important to me that people know what Abaaoud and the others did is not what Islam is teaching.