<br /> Tina Knowles-Lawson says Beyoncé and Jay-Z’s son mimics his father's facial expressions. At the 6th Annual Ladylike Day at UCLA on Saturday, Beyonce's mother opened up about her 7-month-old grandchildren, Rumi and Sir, to Us Weekly. She said, “This is my first experience around twins, and they’re so different, and their personalities, and they are wonderful. <br />
