Dime Store Magic - Kelley Armstrong

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?

Book 3 in the Otherworld series.