M.M.
Hello S.,
We had our daughter when my son was also 4yrs old. Big adjustment to being a Big Brother and having a new addition to the family! My son thought the world revolved around him, and that changed as soon as we brought my daughter home! Before my daughter was born, we attended a Big Sibling class that was offered through the hospital that I delivered at. When we brought my daughter home, we made sure to include him with alot of the baby things...constantly telling him how great of a helper he is. We made sure that if one of us was with my daughter, ther other was with my son so he didn't feel left out. It will take some time, but eventually your son will adjust. My daughter is a little over a year now and my son is 5. Other than a few bits of jealousy here and there, he has adjusted pretty well. Good luck and congrats!