Crone Wars by Donna McDonald

Will the Power of Three soon cease to be?

In a world of witches, familiars, and dark forces, Katherine must prove her loyalty and battle against the hot mess she created by holding back the truth. Mather, a dark witch reborn through sacrifice, is also the man who fathered her and he wants her powers. She should have warned her coven, but she didn’t, and now they no longer trust her.
Her problems are out of control. Sean won’t take no for an answer. People are dropping off strange dog familiars in her shop, and The Baba Yaga is coming by to lecture. Worst of all, Goddess Hecate pronounced her not powerful enough to fight her evil father and only good enough to be used as bait.
How is she ever going to prove everyone is wrong about her?