It may have been jealousy that guided her to this swift judgment upon the character of the emotion correctly and charmingly expressing itself. If so, jealousy was for once a trustworthy guide. She turned swiftly and escaped unseen. The idea of trapping him, of confronting him, never occurred to her. She felt ashamed and self-reproachful that she had seen. Instead of the anger that fires a vain woman, whether she cares about a man or not, there came a profound humiliation. She had in some way fallen short; she had not given him all he needed; it must be that she hadn't it to give, since she had given him all she had. He must not know--he must not! For if he knew he might dislike her, might leave her--and she dared not think what life would be without him, her only source of companionship and affection, her only means of support. She was puzzled that her discovery, not of his treachery--he had so broken her spirit with his suspicions and his insulting questions that she did not regard herself as of the rank and dignity that has the right to exact fidelity--but of his no longer caring enough to be content with her alone, had not stunned her with amazement. She did not realize how completely the instinct that he was estranged from her had prepared her for the thing that always accompanies estrangement. Between the perfect accord, that is, the never realized ideal for a man and a woman living together, and the intolerable discord that means complete repulse there is a vast range of states of feeling imperceptibly shading into each other. Most couples constantly move along this range, now toward the one extreme, now toward the other. As human kings are not given to self-analysis, and usually wander into grotesque error whenever they attempt it, no couple knows precisely where it is upon the range, until something crucial happens to compel them to know. Susan and Rod had begun as all couples begin--with an imaginary ideal accord based upon their ignorance of each other and their misunderstanding of what qualities they thought they understood in each other. The delusion of accord vanished that first evening in New York. What remained? What came in the place? They knew no more about that than does the next couple. They were simply "living along." A crisis, drawing them close together or flinging them forever apart or forcing them to live together, he frankly as keeper and she frankly as kept, might come any day, any hour. Again it might never come. After a few weeks the matter that had been out of her mind accidentally and indirectly came to the surface in a chance remark. She said: "Sometimes I half believe a man could be untrue to a woman, even though he loved her."