Liza Minnelli says her 'center of gravity crumbled' after finding husband Peter Allen in bed with another man

Liza Minnelli is recounting the exact moment she found her ex-husband, Peter Allen, in bed with a man.

In her memoir, "Kids, Wait Till You Hear This!," Minnelli wrote that it was "impossible for her heart to absorb" witnessing her first husband having "passionate sex" with another man.

"One afternoon, returning early from an indulgent shopping spree, I walked into our apartment and found Peter having passionate sex. With a man. In our bed!" Minnelli, who married Allen in 1967, wrote.