Cher opens up about her marriage to Sonny Bono in her new memoir, 'Cher: The Memoir, Part One.' She reveals that she'd just suffered a third miscarriage when she caught Bono cheating with his secretary.

Cher alleged in her new memoir that she caught ex-husband Sonny Bono cheating on her with his secretary around 1967, when she was suffering from her third miscarriage.

The diva was duped by Bono, who had set up a company called Cher Enterprises in which he owned 95 percent, with the other 5 percent going to his lawyer.

I figured I’d plead insanity … Then I’d get a book deal and my own show,” Cher alleges Sonny told her after admitting to thinking about killing her.

Though Cher and Sonny Bono’s marriage lasted less than a decade, their musical hits endured. Yet Cher details in her new memoir that the success of her creative partnership with her late husband wasn’t equally shared.

Cher wasn’t kidding when she sang “Love Hurts.” The singer soared to stardom in the ’60s alongside Sonny Bono as the pop duo Sonny & Cher, but their split was as bitter as they come, with Cher claiming Bono took all her money.

“Cher: The Memoir, Part One” is here – and proving the pop icon is more than "strong enough" to talk about her past. Even when that past involves talking about some uncomfortable topics, including the age gap between her and late ex-husband Sonny Bono.