Telling your older child about the new baby?!

**UPDATE** so we told my son tonight. He was NOT happy. He was upset, and cried, but we talked, just me and him alone. I told him it was okay to be upset for now, but it would mean a lot to me if he could find some happiness in his heart. He said he would. I promised him that I would ALWAYS make time for just the two of us. We shall see how this plays out I suppose.

So, I have a 10 year old from a previous marriage. I am remarried now, I’ve been with my husband for about 4 years but newly married. We are going to be telling my son tomorrow about becoming a big brother. I’m SO nervous he isn’t going to take it well. He’s made comments before about not wanting a baby brother or sister and “I don’t want you to have a baby. I don’t want to hear it crying all night” and he’s such a mommas boy. I know it’s gonna be an adjustment for him seeing as how it’s just been me and him for so long (I got divorced when he was 3). Any of you ladies have any suggestions on how to tell him? We got him a shirt that says “this is what an awesome big brother looks like” and we were gonna gift it to him and tell him he’s gonna have a baby brother or sister in July.