Simon Cowell ex writing tell-all?

Los Angeles - Simon Cowell's ex-fiancée is reportedly writing a tell-all book.

Mezhgan Hussainy apparently wants to get back at the music mogul after comments in his own biography about how they parted ways because when he grew bored of her.

The book will tell the story of his 39-year-old former flames's life from poverty-stricken Afghanistan to Hollywood make-up artist.

But most importantly is will give an account on what it was like dating Simon and living in his mansion as well as revealing the arguments that led to her split with the 52-year-old X-Factor boss last year.

A family told the Mirror: ''Mezhgan was very hurt by some comments in the biography, particularly a quote from Simon's mom Julie that said Mezhgan made her stomach churn.

''She was embarrassed, feeling she'd been made to look a fool, and she plans to put her side across, which is likely to leave Simon squirming.''

In the recent biography, written by journalist Tom Bower, Simon referred to his relationship with Mezhgan as a ''big mistake''.

He added: ''I'm attracted to personalities who are difficult to control. So there are tantrums, tears and fights, which is all part of the drama.''

The Mezghan source added: ''Mezhgan had initially planned to be very positive about Simon, but things have changed after some of the things that have come out and she's not shy about speaking her mind.

''Mezhgan is a very strong-minded woman, she doesn't allow herself to be walked over. Simon should be quietly worried.''