A pair of twins who were adopted by separate families as babies got married without knowing they were brother and sister, a peer told the House of Lords.
A court annulled the UK couple’s union after they discovered their true relationship, Lord Alton said.
The peer – who was told of the case by a High Court judge involved – said the twins felt an “inevitable attraction”.
He said the case showed how important it was for children to be able to find out about their biological parents.
Details of the of the identities of the twins involved have been kept secret, but Lord Alton said the pair did not realise they were related until after their marriage.