Three generations shared the stage at Beyoncé's seond show in Los Angeles as she brought her mom, Tina Knowles, onstage to congratulate her on her book.

So far, Beyoncé’s Cowboy Carter tour has been a fabulous family affair. Daughters Rumi and Blue Ivy have each made cameos on the stage as her backup (and front-of-stage, per Blue for “Déjà Vu!”) dancers. It’s also been seven-year-old Rumi’s onstage debut.

Knowles released her memoir 'Matriarch' on April 22, and previously told PEOPLE that she almost didn't write itA special guest joined Beyoncé onstage during the second night of her Cowboy Carter Tour — her mom,