League of Lilith by Sugrue and Sugrue

Sarai, a Biblical Studies lecturer, learns a great and terrible truth - a core knowledge she must impart to a sucessor. Will she choose Christchurch society wife, Jen, or prostitute Kat? The lives of these two women collide in unexpected ways around Sarai, while in the wings lurk a coven of Wiccan witches, and the dark desires and dealings that threaten Jen's husband, Wilkin. to what lengths will he go to get the heir he desperately desires? Has Womenkind surrendered it's sacred duty? Does Sarai know the secret to the world's survival or has a life of radical feminism driven her insane?