Who are X & Y?
"My dear uncle, how can you talk in such an exaggerated fashion?" X protested. "Do but recollect a little! Y may be a ****, but at least he won't turn out to be my father!"
"Turn out to be your father?" repeated Z, in a stupefied tone. "What, in heaven's name--?"
Y's shoulders had begun to shake. "Oedipus," he said. "At least, so I apprehend, but she has become a trifle confused. What she means is that she won't turn out to be my mother."
"Well, it is the same thing, Y!" said X, impatient of such pedantry. "Just as unsuitable!"
Look at the answer?