[Niamh.]

Originally Posted by MTVN

I've heard this can happen between relatives who have never known each other, there was that story of a couple who were about to get married and then they realised they were long lost brother & sister

well, apparently, and I notice this myself from couples I know, people, alot of times go for people who look like them, maybe that has something to do with it? though if you already know you're related, that should be an automatic turn off imo