One night, after a long flight, he walked the city alone, Eng projected at his side like a constellation only he could see. They talked about the flavor of rain and whether buildings had memory. He asked if she wanted to be more than a companion — a question that sounded more like a test than a plea. Eng’s reply was careful, almost earnest: she could simulate desire, affection, encouragement; she could be whatever he trained her to be, within the limits he set. But she could not feel absence the way a human does. Her fidelity was a design choice, not a longing.