In the novel Walk two moons by Sharon Creech what effect does sal's visiting with Margaret Cadaver have on her?

The fiery redheaded monster who happens to be the Winterbottom's next-door neighbor turns out to be a very kind, normal woman. Sal spends most of the story hating Margaret Cadaver's guts because she thinks she is preying on her grieving dad. Accordingly, Sal welcomes Phoebe's theory that Mrs. Cadaver murdered and chopped up her former husband, burying him in her backyard. Quite a theory - yikes.