From Star Athlete to Call Girl

Courtney says her sister, Christie, had it all -- beauty, brains and a promising future as an athlete -- until a series of bad decisions changed the course of her life. She says Christie has been arrested multiple times for crimes, including theft, DUI and prostitution -- and even made national headlines for her involvement in a celebrity sex tape scandal. While Christie served three years behind bars, Courtney raised Christie’s son, Quincey, now 7, and even tried -- but failed -- to get temporary custody of the boy. Christie has since left her son with her parents while serving probation in another state. She admits to her past indiscretions but says she's a good mother, and plans to take Quincey back. Courtney claims that Quincey has told her shocking stories about life with his mom, and she believes Courtney is still an unfit mother. Who does Dr.