From FreeRadicals a Feb '10 commentary on the UK experience, with links to details and ends with this:
What remains somewhat unexplored (to my knowledge – any pointers to interesting reports greatly appreciated) is the role that women have played in terrorist plots – are they accelerators in their husbands radicalization (or possible plotters)? Or are they innocent naďf's who either get caught up in their husband's plotting or are firmly kept out of the loop by domineering males?

Or is none of this the case, and in fact they could play a positive role in shifting the husband’s attention from his extreme ideas? All of which would be useful knowledge when attempting to craft a counter- or de-radicalization strategy.
The author is an analyst linked to IISS and the link is:http://icsr.info/blog/The-Terrorists-Wife