Older sibling at 18

Hey all. Outside of comics I’ve taken to play writing. I have a story that’s taken a turn to something I’m a little unfamiliar with. The main character learns her mother is pregnant and that she’s going to be an older sister at 18. Now I’m a middle child, my younger sibling was born when I was 8. But 8 year old boys see nearly everything as a big adventure so I’m sure it would be different if I was older. So anyone experience this sort of thing and want to share?

Errr… I’m the 9th and my little sis was born when I was 5 so… I’m afraid I can’t help :slight_smile: