Dime Store Magic ( Otherworld #3) by Kelley Armstrong-Used

Leader of the American Coven, guardian to the preteen daughter of a black witch... it’s not the lifestyle twenty-three year-old Paige Winterbourne imagined for herself, and it’s wreaking hell on her social life.

But she’s up to the challenge. When half-demon Leah O’Donnell returns to fight for custody of Savannah, Paige is ready.

She’s not as prepared for the team of supernaturals Leah brings with her, including a powerful sorcerer who claims to be Savannah’s father. Cut off from her friends, accused of witchcraft, Satanism, necromancy, murder. . . Paige quickly realizes that keeping Savannah could mean losing everything else. Has she finally found a battle she isn’t willing to fight?