[Gayle]

It was in the Guardian too. But the one thing that was pointed out there that is quite relevant is that they had been seperated all through their formative years. Apparently, it happens quite often when siblings have been seperated at a young age and meet again as adults - they find themselves connecting but mistake it as sexual rather than family because they have no frame of reference. Apparently, also works the same way with parents meeting up with their children after being seperated - it's only knowing how society would judge them that keeps them from doing something improper.

I'm not condoning it and certainly don't think it's healthy but just think how many couples are attracted to each other who are alike in personality and looks.