It's come out in the British House of Lords that a pair of twins, who didn't realize they were siblings, were married. Once the couple found out how close they really were, the marriage was annulled. The matter was discussed during a debate on the legislation surrounding human fertility and embryology. From CNN:
"They were never told that they were twins," (a senior British lawmaker) said during the Dec. 10 debate... They had been adopted by separate families and "met later in life and felt an inevitable attraction, and the judge had to deal with the consequences of the marriage that they entered into and all the issues of their separation."Link (Thanks, Mark Pescovitz!)
No further details about the couple have emerged, and it is not known when the marriage took place or how long they were together before they discovered the truth.
Adoption groups said Friday the case proves the need for openness and transparency during the adoption process.