What Should I Do If My Younger Brother Keeps Pestering Me?

I don't change my surname when I'm sitting, and I don't change my name when I stand, so is Xiao Ning. The right people will meet at the right time. He has two faces. In front of her, he is a coquettish and arrogant man, and to outsiders he is a cold young master. He blocked her with red eyes and said: Xiao Ning, do you not want to be responsible? Xiao Ning: But we are all adults, and I don't want you to be responsible. Don't cry.