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.

In "The Memoir, Part One," Cher details her fraught marriage with Sonny Bono, including their imbalanced working relationship.

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.

In 1972, Sonny Bono told Cher he “seriously thought” about how he’d kill his then-wife, and how he’d parlay his infamy into a new career.

Even when that past involves talking about some uncomfortable topics, including the age gap between her and late ex-husband Sonny Bono. Salvatore Bono entered Cher’s life as a protector and champion,

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.