I was an only child until I was twelve. Seriously. Now I have a two year old little sister. Good thing I'll be out of the house by the time she hits my age. -.-
I did have a foster brother once though, but things just weren't working out the best they could between us, so he went back to his real mom. It was when I was maturing a lot and turning into who I am now and I literally couldn't stand it, because he was "Emo"
No offense to any out there who label yourselves as "Emo", I just couldn't stand the kid.