(Psychological / emotional perspective)
Since self-image and sexuality are so closely connected, incest in dreams is much more likely to be an effort to sort out our feelings about ourselves than anything else. Dreaming of incest with brothers or sisters may symbolize an attempt to unify the masculine and feminine aspects within us. We are attempting to make a link with the part of our own personality most closely reflected by that person. We can only do this within the safety of a dream.