Margot Al-Harazi

Margot Al-Harazi is the widow of a well-known British terrorist and the mother of Simone Al-Harazi. She was a conspirator working with Derek Yates, who he was intending to sell a device that would allow military drones to be hacked into and remotely controlled.

Live Another Day
Margot calls Yates after viewing the video of the drone attack, impressed with his work and making sure that the attack isn't traceable back to him. She requests meeting him at a designated location with his money in exchange for selling the device to him.

At the meeting place, Yates considers double-crossing Margot. Simone (who had been posing as a Russian and was Yates's girlfriend) stabs him in the side of the head, killing him instantly. Simone calls Margot, saying that she is in possession of the device and has killed Yates because he wanted to double-crossed her. It's revealed in this conversation that Simone is Margot's daughter.