big bump

Today, Jason said he wanted Rachel to go "back in my belly". I am not sure how serious he was about this but he did say it twice. Then he laughed and moved onto another topic. Yesterday, he was playing with her in the living room and he managed to end up pushing her into a glass table where she really hit her head. She is ok even with the big bump on her forehead. Jason immediately put a band aid on his OWN forehead and even slept that way. At supper he told me that he doesn't feel bad at all that his sister got hurt because she was fine (she was sitting in her highchair happily chatting away at the time). What does it all mean?? Is there a 4yr old interpreter out there somewhere?? I really think that him putting a bandaid on his own forehead meant he felt bad for hurting his sister. Or maybe it just makes me feel better to believe that.