When she was a child, she told him, you are older than me, you are the elder brother, you have to take care of me and protect me. If you have anything delicious, you have to give it to me first. If you have anything fun, you have to let me play with it first. If you can't let it go, you have to remember that I haven't played with it yet. When you are happy, you also want to make me happy. When you are unhappy, don't affect my mood. So you can face me when you laugh, but hide away from me when you cry.
No one said she was overbearing, it was just a matter between children. He wouldn't call her domineering, he hadn't learned the word yet, and given his personality, he wouldn't say anything about her.