So do you expect the friend to teach Gypsy right from wrong? When her own mother is telling her otherwise?
No, I'm trying to say that Dee Dee wasn't the only influence on Gypsy's life. Had she been raised off the grid in a cabin in the woods and had never read a book, or seen tv/movies, etc., then I'd buy that Dee Dee could make Gypsy think whatever she wanted about right and wrong. But Gypsy did have all those views into the world, so she had at least some view into normal social right/wrong.