I can't work it out and my head is getting mashed. Can anyone work out how someone is related to me albeit very thinly?
My grandad got married. He had 2 children A & B. then he divorced.
He then met a woman who was already pregnant (child C), married her and brought C up as his own.
Then he had another child (D) with the same woman. Making C & D Half Brother and Sister.
This also made D Half Brother to A & B.
what relationship even distantly are A & B to C?