They may already know too much about their mother and....

“ They may already know too much about their mother and father--nothing being more factual than divorce, where so much has to be explained and worked through intelligently (though they have tried to stay equable). I've noticed this is often the time when children begin calling their parents by their first names, becoming little ironists after their parents' faults. What could be lonelier for a parent than to be criticized by his child on a first-name basis? ”

Richard Ford

From : The Sportswriter