I'm not sweetie

On Wednesday night I babysat for my friend Marie's kids while she went to back to school night. When I got there Peter had to show me that he was wearing big boy underwear and not diapers anymore. So of course I toldm him what a big boy he was. Later that night as I was putting him to bed I told him good night sweetie I'll see you soon. He looks at me and says "I'm not your sweetie, I'm your big boy!!! Point taken Good night Big Boy.