Beyoncé and Jay-Z are one of the world's most famous power couples. And they now have an equally famous family, with daughter Blue Ivy, 13, and seven-year-old twins, Rumi and Sir. But Beyoncé's mother,

"It came at a time that I was open to writing my history down," says the author of her new book, ‘Matriarch: A Memoir.'

Tina Knowles detailed how her daughters Beyoncé, Solange Knowles, plus Kelly Rowland supported her amid her breast cancer journey last year.