So apparently Beyonce has another little sibling, a half-sister named Koi. A court order forced Matthew to take a paternity test and the results came back that he is 99.9% the father.

http://www.dailymail.co.uk/tvshowbiz/article-2812986/Beyonce-s-secret-sister-Mathew-Knowles-love-child-pictured-time-mother-says-hopes-four-year-old-Koi-one-day-meet-singer.html