Moms I'm worried. I'm about to be 21 weeks pregnant and I'm so scared that Delos who just turned a…

Moms I'm worried. I'm about to be 21 weeks pregnant and I'm so scared that Delos who just turned a year old won't take to the new baby well. He's a spoiled brat (not by our doing) but he made a girl his age cry the other day because he gets excited around kids and flails his arm and hits too hard. How can you make sure your older kid won't constantly make the new baby cry? He will be almost a year and a half at the time.