The knowledge of hidden psychic feelings which psychoanalytic investigation of individuals has given us, makes it possible to add other motives to the above. Where the psycho-sexual needs of the woman are to be satisfied in marriage and family life, there is always the danger of dissatisfaction through the premature termination of the conjugal relation, and the monotony in the wife’s emotional life. The ageing mother protects herself against this by living through the lives of her children, by identifying herself with them and making their emotional experiences her own. Parents are said to remain young with their children, and this is, in fact, one of the most valuable psychic benefits which parents derive from their children. Childlessness thus eliminates one of the best means to endure the necessary resignation imposed upon the individual through marriage. This emotional indentification with the daughter may easily go so far with the mother that she also falls in love with the man her daughter loves, which leads, in extreme cases, to severe forms of neurotic ailments on account of the violent psychic resistance against this emotional predisposition. At all events the tendency to such infatuation is very frequent with the mother-in-law, and either this infatuation itself or the tendency opposed to it joins the conflict of contending forces in the psyche of the mother-in-law. Very often it is just this harsh and sadistic component of the love emotion which is turned against the son-in-law in order better to suppress the forbidden tender feelings. The relation of the husband to his mother-in-law is complicated through similar feelings which, however, spring from other sources. The path of object selection has normally led him to his love object through the image of his mother and perhaps of his sister; in consequence of the incest barriers his preference for these two beloved persons of his childhood has been deflected and he is then able to find their image in strange objects. He now sees the mother-in-law taking the place of his own mother and of his sister’s mother, and there develops a tendency to return to the primitive selection, against which everything in him resists. His incest dread demands that he should not be reminded of the genealogy of his love selection; the actuality of his mother-in-law, whom he had not known all his life like his mother so that her picture can be preserved unchanged in his unconscious, facilitates this rejection. An added mixture of irritability and animosity in his feelings leads us to suspect that the mother-in-law actually represents an incest temptation for the son-in-law, just as it not infrequently happens that a man falls in love with his subsequent mother-in-law before his inclination is transferred to her daughter.