He has been doing this for years. It's quite likely that a child born without a donor (and thus unsuspecting) but with a parent born from this donor will fall i

He has been doing this for years. It's quite likely that a child born without a donor (and thus unsuspecting) but with a parent born from this donor will fall in love with a later child from this donor. Suddenly you have half-uncle/aunt procreating with half-nie ce/nephew...