Twins discover they have different fathers via DNA test in 1st such case for UK

Twins, Michelle and Lavinia Osbourne, recently discovered that they have different fathers through a take-home DNA test, officially becoming UK's first recorded case of heteropaternal superfecundation. Less than 20 cases of the rare biological condition have been reported so far. It occurs when two or more eggs released in the same menstrual cycle are fertilised by sperms from different men.