This is the third book in the Spellcrackers.com urban fantasy series. Our MC is Ginny, a full-blooded sidhe fae who has no magic of her own, but is capable of cracking (breaking) other peoples magic.
There is a major continuation here from events in the previous books, but essentially, a fertility curse has been placed on the fae, and they have been unable to conceive any full-blooded fae children for a while. They are able to have faelings (half fae/half human). Ginny has been viewed as the hope of the fae race, and if she can conceive and carry a child to term, it is believed that the curse will be broken. There are some pretty funny moments of everyone courting Ginny, but she is really not interested in getting pregnant to break the curse.
Also, in this story, the faelings have started dying of mysterious circumstances, and Ginny is trying to help solve the case. Not to give anything away, but the central mystery turns out to be tightly intertwined with the curse and Ginny's hidden family tree.
The major things that I like about this series are that Ginny is not a powerful, kick-butt heroine, although she does have certain talents. And Suzanne McLeod has done some great world-building here, with the different races and their primary characteristics. And there are also some powerful sexy love interests!