ok so my SO and i are expecting our first child together and i am not sure how to handle the whole stepkid and new baby thing..... my 4 year old step son calls me by my first name, and it hasnt been a problem. he calls his birth mother mommy and for now until he is old enough to understand that he has a mom and a step mom we are keeping it that way. but now with a new baby on the way i wonder how this will work out, clearly the baby will be calling me mommy and his father daddy, but i think that the son will be confused a little about why that is and why i am mommy to the baby but tracy to him.... so for all the other step mothers out there that also have bio kids, how did you handle this? i dont want to make him feel left out or that he is different. is 4 years old too early to explain that he has a different mommy and how do you do that?