Diana wrote:Wait the answer was half siblings? Arent you not an only child then? Step or adopted makes more sense.
Nuclear family versus extended
From the nuclear standpoint, I am an only child
My sister from dad can claim the same through this
We go to extended, then I get two sisters and a brother
All three are from mom and dad's first marriages, who were from different people
I am from their current, their second
There's an unspoken blood relation claim involved, hence why neither step nor adopted work for this riddle