"In brief… the parents were the father and the mother." The smut that was really science fell with a crash into the boys' eye-avoiding silence.
'Mother,' he repeated loudly rubbing in the science; and, leaning back in his chair, 'These,' he said gravely, 'are unpleasant facts; I know it. But then most historical facts are unpleasant."
What can BEST be inferred from the quote?