Beyonce's Dad Mathew Knowles Accidentally Reveal The Sexes Of Her Twins In an interview with "The Insider," Mathew Knowles not only admitted that he had no idea Beyoncé was pregnant, but many people believe that he accidentally revealed the sexes of her unborn twins. At first, the sit-down was going smoothly. Knowles was speaking about the moment he found out Bey was expecting. “I was shocked. I got a first text, and I was like, ‘Why is this person saying congratulations?’ Then I get a second text from one of my students at Texas Southern, and I was like, ‘What are you talking about?’ He was like, ‘Go to the web.’ I didn’t know myself,” he said. Then, Knowles' tongue slipped when he went into further detail about Bey's pregnancy.