Black Mamba

Blood is thicker than water, or so they say. For Detective Billie McCoy, blood doesn't come into it with her family. Her three best friends, Casey, Jane and Sarah, are like sisters to her, and with the four of them lacking any blood-relatives, you'd be hard pushed to find a tighter bunch. So, when Casey's long lost cousin Jill turns up out of the blue, Billie is thrilled for the girls to have foun...