Aw! Haha that's adorable. My little brother is 3, gunna be 4 on New Years Eve. I was an only child for 9 years, he's the only person that's ever talked back to me but I gotta give him props for it haha. He always calling me "hotshot", like I do to people
"It's not ya day, hotshot!"
"Ya outta luck, kid!"
And things. Haha.