Who is Maeve Livingstone from Anansi Boys: A Novel and what is their importance?

Maeve Livingstone is Morris' widow. When she finds herself unable to access any of her husbands funds on deposit with the Grahame Coats Agency, she becomes suspicious and investigates. her investigation reveals the extent of Coats' embezzlement activities, but when she confronts him with the evidence..... he murders her and hides the body.