There is a joke in my family that my father's father is not his biological father. He only has sisters and his father is dead, so there's no possibility of a true test. But I'm his daughter and I did a DNA test, and here's what I got.
I got DNA results back and here's what it says about one of my aunts that tested too. Great aunt or cousin is the link they gave us.
12,2% (866,2 cM) DNA shared 19 Segments shared 106,2 cM Segment longest
Does that actually mean the joke is true and my aunt is my half aunt?