Sometimes jihadists will kidnap and rape a woman, providing a basis for an adultery charge and also dishonoring her family. They offer her a choice: be stoned to death for adultery - the islamic way - or restore her family honor through martyrdom. I suspect the latter is the case.
Nah, this woman was all in it. She had a Master of Science degree in Zoology and a Twitter account where she posted various tweets about dying for a cause and quotes from Fidel Castro.