Simpson's mum 'writing tell-all book'

Jessica Simpson's mother is writing a tell-all book about her 34-year marriage to Joe Simpson, it has been claimed.

Tina Simpson entered divorce documents dated September 24 in McLennan County, Texas.

The estranged couple cited 'discord and conflict of personalities' as grounds for the split.

Reports surfaced Joe, a former Baptist minister known for managing the careers of daughters Jessica and Ashlee, was having an affair with a 21-year-old male model named Bryce Chandler Hill.

A representative for the family has denied the explosive claims.

According to Star magazine, Tina, 52, has now signed a 'million dollar deal' with publishers to tell all about her marriage to Joe, and what caused it to fall apart.

'Tina was already planning on writing a book before her marriage to Joe crumbled, but that was going to be about her own life as mom to Jessica and Ashlee,' an source told the magazine.

'Now that idea has been shelved, and Tina is focusing on writing a tell-all about her marriage to Joe.'

A spokesperson for the family has yet to comment on the report.