Tina Knowles loves being a grandmother to Beyoncé‘s three kids - but she's not so much a fan of how the world turned on her daughter when the superstar was first expecting. In an interview with People published Tuesday (April 22) - the same day the businesswoman's new memoir,

In her upcoming memoir, Tina Knowles opens up about the "horrendous" rumors that Beyoncé faked her pregnancy with Blue Ivy.

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