DS used to call us by our first names and we never corrected him. We just used to call each other Mummy and Daddy when talking to him. Eventually he used Mummy and Dad more often. Then DD came along and he reverted to calling us by our first names again.
When asked by his gran why he calls us by our first names he says ' Because X is their name and Mummy is what they do'. I find it hard to argue with that logic. DD is now starting to use our first names. I just wondered if other had similar experience and do you think it is an important issue. DS is 6 and dd is 20 mths.