starfiresilverstar: indeed it raises questions. One father can have 100 children. And to be precise they are not just siblings. Actually they are brothers and sisters
Tyler_Grey: The article suggests he, at least, was using the neutral term because "brother" and "sister" seemed more intimate than he had earned with them.
Sudden thought, about people checking if they're donor children before dating - what about, not just them, but their parents? First cousin crosses are almost as genetically risky, although the half-cousin nature mitigates that a bit, but the likelihood is also far more obscured.