I have an older brother who is 44 (he has a different Dad to me, mum married when she was 21, already pregnant with my brother haha but he hubby died when my brother was 3 months old, his dad was only 21 aswell when he died so that's why mum had one child with a different father but I cosider my brother my "full" brother)

I have an older sister who is 36

I have a twin sister, the same age as me hahahaha 30.

My parents are still married so no step sisters/brothers here (sadly wont be the same for my children growing up, but it's quite normal these days having combined families after divorce)