Beyoncé’s mom, Tina Knowles, is calling it quits with her husband, Richard Lawson, after eight years of marriage, according to court documents cited by TMZ Wednesday. The union was her second, after a 31-year marriage to Beyoncé’s father Mathew Knowles finally crumbled in 2011. In court documents Knowles cited “irreconcilable differences” as the reason for her split with Lawson. Reps for both parties did not respond to TMZ when approached for comment.