Is this straightforward incest? Or could love between consenting adult relatives be the result of something else

DURATION: 47:21
DISTRIBUTOR: All3Media
UNFORTUNATELY, THIS CONTENT IS NOT AVAILABLE IN THE FOLLOWING TERRITORY: UK & Denmark
Please note this content is not available for licensing from Barcroft Media Ltd.

The taboo of incest and how it is commonly perceived in modern society is explored in this documentary. It specifically investigates the effects of 'Genetic Sexual Attraction'; a phenomenon some experts believe is experienced by up to 50% of adoptees when they first meet their blood relatives. One case specifically highlighted is that of a young German couple whose relationship and subsequent family has sent shock waves throughout Germany.