I have three children, the youngest has just turned 5 months. He’s a clingy baby who hates being put down and is a terrible daytime and nighttime sleeper. I am totally exhausted. My other two children have been generally great since his arrival but in the last couple of weeks DS2 (almost 4 year old) has started to hit, kick and punch me and his dad. He’s never done this before and I’m not sure how to deal with it. We usually say something like we don’t hit and then leave him alone to cool down for a few minutes. He’ll then apologize but does it again, sometimes straight away. Today he started hitting me because I told him he couldn’t ride his scooter in the house. He then slapped the baby. I was so shocked, I took him to his room and have told him to stay there until he’s calmed down. He’s not in the slightest bit bothered though. I can hear him playing and chatting away to himself. Should there be more punishment or is that enough now?