Board Thread:General Discussion/@comment-3257939-20131104060426/@comment-16502426-20131120123532

124.83.7.182 wrote: So... illegitimate child theory?

Not really. Half siblings can happen through remarriage or a number of other things. My father's first wife (the mother of my sisters) died of cancer when they were young, for instance.

But in any case, I think they're just full sisters anyway.